CA2636022C - Device and method for generating a liquid detergent concentrate from a solid detergent and a method for washing a vehicle - Google Patents
Device and method for generating a liquid detergent concentrate from a solid detergent and a method for washing a vehicle Download PDFInfo
- Publication number
- CA2636022C CA2636022C CA002636022A CA2636022A CA2636022C CA 2636022 C CA2636022 C CA 2636022C CA 002636022 A CA002636022 A CA 002636022A CA 2636022 A CA2636022 A CA 2636022A CA 2636022 C CA2636022 C CA 2636022C
- Authority
- CA
- Canada
- Prior art keywords
- detergent
- water
- liquid detergent
- solid
- stock solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003599 detergent Substances 0.000 title claims abstract description 146
- 239000013042 solid detergent Substances 0.000 title claims abstract description 77
- 239000012141 concentrate Substances 0.000 title claims abstract description 68
- 239000007788 liquid Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005406 washing Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 133
- 239000004094 surface-active agent Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000007865 diluting Methods 0.000 claims 1
- 239000011550 stock solution Substances 0.000 abstract description 99
- 235000008504 concentrate Nutrition 0.000 description 48
- 239000000203 mixture Substances 0.000 description 44
- 239000003981 vehicle Substances 0.000 description 38
- 239000000243 solution Substances 0.000 description 34
- 239000003795 chemical substances by application Substances 0.000 description 29
- 238000004140 cleaning Methods 0.000 description 22
- 239000007787 solid Substances 0.000 description 22
- -1 flakes Substances 0.000 description 17
- 239000007921 spray Substances 0.000 description 10
- 239000002253 acid Substances 0.000 description 9
- 150000003839 salts Chemical class 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 239000003112 inhibitor Substances 0.000 description 7
- 229920001223 polyethylene glycol Polymers 0.000 description 7
- 239000006057 Non-nutritive feed additive Substances 0.000 description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- 125000000217 alkyl group Chemical group 0.000 description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 5
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 5
- 229910052783 alkali metal Inorganic materials 0.000 description 5
- 239000003945 anionic surfactant Substances 0.000 description 5
- 235000014666 liquid concentrate Nutrition 0.000 description 5
- 239000003352 sequestering agent Substances 0.000 description 5
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 239000002202 Polyethylene glycol Substances 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 4
- 239000004480 active ingredient Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000002738 chelating agent Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 235000021317 phosphate Nutrition 0.000 description 4
- 229910052700 potassium Inorganic materials 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical class CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- 150000001408 amides Chemical class 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 239000003093 cationic surfactant Substances 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000003752 hydrotrope Substances 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 239000002736 nonionic surfactant Substances 0.000 description 3
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 3
- 150000003014 phosphoric acid esters Chemical class 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 3
- 150000004760 silicates Chemical class 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 3
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- LDVVTQMJQSCDMK-UHFFFAOYSA-N 1,3-dihydroxypropan-2-yl formate Chemical compound OCC(CO)OC=O LDVVTQMJQSCDMK-UHFFFAOYSA-N 0.000 description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical class NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical class C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 150000008051 alkyl sulfates Chemical class 0.000 description 2
- 239000002280 amphoteric surfactant Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000536 complexating effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical class CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 150000002169 ethanolamines Chemical class 0.000 description 2
- MTZQAGJQAFMTAQ-UHFFFAOYSA-N ethyl benzoate Chemical class CCOC(=O)C1=CC=CC=C1 MTZQAGJQAFMTAQ-UHFFFAOYSA-N 0.000 description 2
- 239000003205 fragrance Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 235000011181 potassium carbonates Nutrition 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- FKKAGFLIPSSCHT-UHFFFAOYSA-N 1-dodecoxydodecane;sulfuric acid Chemical compound OS(O)(=O)=O.CCCCCCCCCCCCOCCCCCCCCCCCC FKKAGFLIPSSCHT-UHFFFAOYSA-N 0.000 description 1
- LWPLSMSFAZPBGO-UHFFFAOYSA-N 1-dodecyl-2h-pyridine;hydrochloride Chemical compound Cl.CCCCCCCCCCCCN1CC=CC=C1 LWPLSMSFAZPBGO-UHFFFAOYSA-N 0.000 description 1
- ZZNDQCACFUJAKJ-UHFFFAOYSA-N 1-phenyltridecan-1-one Chemical compound CCCCCCCCCCCCC(=O)C1=CC=CC=C1 ZZNDQCACFUJAKJ-UHFFFAOYSA-N 0.000 description 1
- URDCARMUOSMFFI-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]ethyl-(2-hydroxyethyl)amino]acetic acid Chemical compound OCCN(CC(O)=O)CCN(CC(O)=O)CC(O)=O URDCARMUOSMFFI-UHFFFAOYSA-N 0.000 description 1
- RKZIPFOHRUCGGS-UHFFFAOYSA-N 4,5-dihydroimidazole-1-carboxylic acid Chemical class OC(=O)N1CCN=C1 RKZIPFOHRUCGGS-UHFFFAOYSA-N 0.000 description 1
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- QZXSMBBFBXPQHI-UHFFFAOYSA-N N-(dodecanoyl)ethanolamine Chemical compound CCCCCCCCCCCC(=O)NCCO QZXSMBBFBXPQHI-UHFFFAOYSA-N 0.000 description 1
- OTGQIQQTPXJQRG-UHFFFAOYSA-N N-(octadecanoyl)ethanolamine Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCO OTGQIQQTPXJQRG-UHFFFAOYSA-N 0.000 description 1
- BACYUWVYYTXETD-UHFFFAOYSA-N N-Lauroylsarcosine Chemical compound CCCCCCCCCCCC(=O)N(C)CC(O)=O BACYUWVYYTXETD-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical class CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical class OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- XYQRXRFVKUPBQN-UHFFFAOYSA-L Sodium carbonate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]C([O-])=O XYQRXRFVKUPBQN-UHFFFAOYSA-L 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- 150000003973 alkyl amines Chemical group 0.000 description 1
- 150000008055 alkyl aryl sulfonates Chemical class 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 235000012206 bottled water Nutrition 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000005323 carbonate salts Chemical class 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 150000001860 citric acid derivatives Chemical class 0.000 description 1
- 229940096386 coconut alcohol Drugs 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- FZCSCCVLIJOECE-UHFFFAOYSA-L dipotassium carbonate trihydrate Chemical compound O.O.O.[K+].[K+].[O-]C([O-])=O FZCSCCVLIJOECE-UHFFFAOYSA-L 0.000 description 1
- KMUFDTCJTJRWGL-UHFFFAOYSA-L dipotassium;carbonate;dihydrate Chemical compound O.O.[K+].[K+].[O-]C([O-])=O KMUFDTCJTJRWGL-UHFFFAOYSA-L 0.000 description 1
- GLYUSNXFOHTZTE-UHFFFAOYSA-L disodium;carbonate;heptahydrate Chemical compound O.O.O.O.O.O.O.[Na+].[Na+].[O-]C([O-])=O GLYUSNXFOHTZTE-UHFFFAOYSA-L 0.000 description 1
- MQRJBSHKWOFOGF-UHFFFAOYSA-L disodium;carbonate;hydrate Chemical compound O.[Na+].[Na+].[O-]C([O-])=O MQRJBSHKWOFOGF-UHFFFAOYSA-L 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical class CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- MOTZDAYCYVMXPC-UHFFFAOYSA-N dodecyl hydrogen sulfate Chemical compound CCCCCCCCCCCCOS(O)(=O)=O MOTZDAYCYVMXPC-UHFFFAOYSA-N 0.000 description 1
- 229940043264 dodecyl sulfate Drugs 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- OUDSFQBUEBFSPS-UHFFFAOYSA-N ethylenediaminetriacetic acid Chemical compound OC(=O)CNCCN(CC(O)=O)CC(O)=O OUDSFQBUEBFSPS-UHFFFAOYSA-N 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XGZOMURMPLSSKQ-UHFFFAOYSA-N n,n-bis(2-hydroxyethyl)octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)N(CCO)CCO XGZOMURMPLSSKQ-UHFFFAOYSA-N 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- 150000003009 phosphonic acids Chemical class 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920001983 poloxamer Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 239000011736 potassium bicarbonate Substances 0.000 description 1
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 1
- 235000015497 potassium bicarbonate Nutrition 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 108700004121 sarkosyl Proteins 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229940001593 sodium carbonate Drugs 0.000 description 1
- 229940018038 sodium carbonate decahydrate Drugs 0.000 description 1
- 229940076133 sodium carbonate monohydrate Drugs 0.000 description 1
- 235000011182 sodium carbonates Nutrition 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 229910000031 sodium sesquicarbonate Inorganic materials 0.000 description 1
- 235000018341 sodium sesquicarbonate Nutrition 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000003890 succinate salts Chemical class 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 239000003826 tablet Substances 0.000 description 1
- 150000003892 tartrate salts Chemical class 0.000 description 1
- RYCLIXPGLDDLTM-UHFFFAOYSA-J tetrapotassium;phosphonato phosphate Chemical compound [K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])([O-])=O RYCLIXPGLDDLTM-UHFFFAOYSA-J 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 150000003573 thiols Chemical class 0.000 description 1
- 239000013638 trimer Substances 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 1
- WCTAGTRAWPDFQO-UHFFFAOYSA-K trisodium;hydrogen carbonate;carbonate Chemical compound [Na+].[Na+].[Na+].OC([O-])=O.[O-]C([O-])=O WCTAGTRAWPDFQO-UHFFFAOYSA-K 0.000 description 1
- SOBHUZYZLFQYFK-UHFFFAOYSA-K trisodium;hydroxy-[[phosphonatomethyl(phosphonomethyl)amino]methyl]phosphinate Chemical compound [Na+].[Na+].[Na+].OP(O)(=O)CN(CP(O)([O-])=O)CP([O-])([O-])=O SOBHUZYZLFQYFK-UHFFFAOYSA-K 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000002888 zwitterionic surfactant Substances 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F21/00—Dissolving
- B01F21/20—Dissolving using flow mixing
- B01F21/22—Dissolving using flow mixing using additional holders in conduits, containers or pools for keeping the solid material in place, e.g. supports or receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- C11D2111/14—
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/4891—With holder for solid, flaky or pulverized material to be dissolved or entrained
Abstract
A device for generating a liquid detergent concentrate from a solid detergent is provided. The device includes a solid detergent reservoir for holding solid detergent, a stock solution reservoir for holding stock solution, and a hot water heater for controlling the temperature of water used to generate the stock solution from the solid detergent. A method for generating a liquid detergent concentrate from a solid detergent and a method for washing a vehicle are provided.
Description
DEVICE AND METHOD FOR GENERATING A LIQUID DETERGENT
CONCENTRATE FROM A SOLID DETERGENT AND A METHOD FOR
WASHING A VEHICLE
Field of the Invention The invention relates to a device for generating a liquid detergent concentrate from a solid detergent, a method for generating a liquid detergent concentrate from a solid detergent, and to a method for washing a vehicle.
Baekground of the Invention Liquid detergent concentrates for use in the veliicle washing industry are conventionally shipped in large containers. Typically, a line is attached to the container containing the large amount of liquid detergent concentrate, and a portion of the liquid detergent concentrate is drawn off for each vehicle washing cycle.
Shipping large concentrates of liquid detergent can be expensive. In addition, disposal of the container that holds the liquid detergent concentrate can be problematic.
As an alternative to shipping large volumes of liquid concentrate, large volumes of liquid concentrate can be generated on site by mixing a detergent powder with water. Once the liquid concentrate is used up, a new batch of liquid concentrate can be prepared. One technique for preparing a liquid concentrate from detergent powder is by subnlerging the detergent powder in a tank filled with an aqueous solution. This technique requires an operator to place detergent directly into standing water. Splashing caused by adding the detergent directly into tlie concentrated solution and/or mechanical mixing using a mixing blade can pose a safety hazard.
Much attention has been directed by Ecolab Inc., the assignee of this patent application, in preparing liquid detergents from solid detergent concentrates.
This focus of attention has been directed mostly at warewashing and clothes washing. See, for example, U.S. Pat. No. 4,687,121 issued to Copeland et al;
and U.S. Pat. Nos. 4,569,781 and 4,569,780 issued to Fernholz et al.
Summary of the Invention A device for generating a liquid detergent concentrate from a solid detergent is provided according to the invention. The device includes a solid detergent reservoir, a water inlet, a stock solution reservoir, and a hot water heater.
The solid detergent reservoir is provided for holding solid detergent, and includes a stock solution generating region for generating stock solution from solid detergent provided within the solid detergent reservoir. The water inlet is provided for directing water onto solid detergent provided within the solid detergent solution generating region of the solid detergent reservoir for generating stock solution. The stock solution reservoir is provided for holding stock solution generated in the stock solution generating region. The stock solution reservoir includes a stock solution inlet for receiving stock solution from the stock solution generating region, a stock solution outlet for removal of stock solution from the stock solution reservoir, and a stock solution level sensor for sensing the level of stock solution provided within the stock solution reservoir and for generating a first signal and a second signal. The first signal indicates when the stock solution reservoir requires additional stock solution, and the second signal indicates when the stock solution reservoir has a sufficient amount of stock solution. The hot water heater is provided for controlling the temperature of water provided to the water inlet.
A method for generating a liquid detergent concentrate from a solid detergent is provided according to the invention. The method includes steps of: (a) applying water against a solid detergent in a solid detergent reservoir to provide a liquid detergent concentrate, wherein the water is provided at a relatively constant temperature and the relatively constant temperature is provided within a range of about 40 F and about 150 F; (b) collecting the liquid detergent concentrate in a liquid detergent concentrate reservoir; (c) monitoring the amount of liquid detergent concentrate within the liquid detergent concentrate reservoir and providing a first signal and a second signal, the first signal indicating when sufficient liquid detergent concentrate is provided within the liquid detergent concentrate reservoir and the second signal indicating when more liquid detergent concentrate is needed within the liquid detergent conceiitrate reservoir; and (d) controlling the flow of water
CONCENTRATE FROM A SOLID DETERGENT AND A METHOD FOR
WASHING A VEHICLE
Field of the Invention The invention relates to a device for generating a liquid detergent concentrate from a solid detergent, a method for generating a liquid detergent concentrate from a solid detergent, and to a method for washing a vehicle.
Baekground of the Invention Liquid detergent concentrates for use in the veliicle washing industry are conventionally shipped in large containers. Typically, a line is attached to the container containing the large amount of liquid detergent concentrate, and a portion of the liquid detergent concentrate is drawn off for each vehicle washing cycle.
Shipping large concentrates of liquid detergent can be expensive. In addition, disposal of the container that holds the liquid detergent concentrate can be problematic.
As an alternative to shipping large volumes of liquid concentrate, large volumes of liquid concentrate can be generated on site by mixing a detergent powder with water. Once the liquid concentrate is used up, a new batch of liquid concentrate can be prepared. One technique for preparing a liquid concentrate from detergent powder is by subnlerging the detergent powder in a tank filled with an aqueous solution. This technique requires an operator to place detergent directly into standing water. Splashing caused by adding the detergent directly into tlie concentrated solution and/or mechanical mixing using a mixing blade can pose a safety hazard.
Much attention has been directed by Ecolab Inc., the assignee of this patent application, in preparing liquid detergents from solid detergent concentrates.
This focus of attention has been directed mostly at warewashing and clothes washing. See, for example, U.S. Pat. No. 4,687,121 issued to Copeland et al;
and U.S. Pat. Nos. 4,569,781 and 4,569,780 issued to Fernholz et al.
Summary of the Invention A device for generating a liquid detergent concentrate from a solid detergent is provided according to the invention. The device includes a solid detergent reservoir, a water inlet, a stock solution reservoir, and a hot water heater.
The solid detergent reservoir is provided for holding solid detergent, and includes a stock solution generating region for generating stock solution from solid detergent provided within the solid detergent reservoir. The water inlet is provided for directing water onto solid detergent provided within the solid detergent solution generating region of the solid detergent reservoir for generating stock solution. The stock solution reservoir is provided for holding stock solution generated in the stock solution generating region. The stock solution reservoir includes a stock solution inlet for receiving stock solution from the stock solution generating region, a stock solution outlet for removal of stock solution from the stock solution reservoir, and a stock solution level sensor for sensing the level of stock solution provided within the stock solution reservoir and for generating a first signal and a second signal. The first signal indicates when the stock solution reservoir requires additional stock solution, and the second signal indicates when the stock solution reservoir has a sufficient amount of stock solution. The hot water heater is provided for controlling the temperature of water provided to the water inlet.
A method for generating a liquid detergent concentrate from a solid detergent is provided according to the invention. The method includes steps of: (a) applying water against a solid detergent in a solid detergent reservoir to provide a liquid detergent concentrate, wherein the water is provided at a relatively constant temperature and the relatively constant temperature is provided within a range of about 40 F and about 150 F; (b) collecting the liquid detergent concentrate in a liquid detergent concentrate reservoir; (c) monitoring the amount of liquid detergent concentrate within the liquid detergent concentrate reservoir and providing a first signal and a second signal, the first signal indicating when sufficient liquid detergent concentrate is provided within the liquid detergent concentrate reservoir and the second signal indicating when more liquid detergent concentrate is needed within the liquid detergent conceiitrate reservoir; and (d) controlling the flow of water
2 against the solid detergent provided within the solid detergent reservoir based on the first signal and the second signal.
A method for washing a vehicle is provided according to the invention. The method includes steps of: (a) applying water against a solid detergent provided within a solid detergent reservoir to generate a liquid detergent concentrate; (b) collecting the liquid detergent concentrate in a liquid detergent concentrate reservoir; (c) withdrawing liquid detergent concentrate from the liquid detergent concentrate reservoir and combining the liquid detergent concentrate with water to provide a use solution; and (d) washing the vehicle with the use solution.
Brief Description of the Drawings Figure 1 is a perspective view of a device for generating a liquid detergent concentrate from a solid detergent according to the principles of the invention.
Figure 2 is a front view of the device for generating a liquid detergent concentrate from a solid detergent of Figure 1 with the door open showing the internals of the device.
. Figure 3 is a partial cut-away view of the device for generating a liquid detergent concentrate from a solid detergent of Figure 1.
Figure 4 is a schematic diagram of an apparatus for applying a detergent use solution to a vehicle according to the principles of the invention.
Figure 5 is a schematic diagram of a device for generating an aqueous detergent composition from a solid detergent utilizing multiple detergents.
Figures 6(a) and 6(b) are exeniplaiy 'control logic diagrams for operating the device for generating a liquid detergent concentrate from a solid detergent according to the principles of the invention.
Detailed Description Now referring to Figures 1-3, a device for generating a liquid detergent concentrate from a solid detergent according to the invention is shown at reference numeral 10. The device for generating a liquid detergent concentrate from a solid detergent 10 can be referred to more simply herein as the "device."
The
A method for washing a vehicle is provided according to the invention. The method includes steps of: (a) applying water against a solid detergent provided within a solid detergent reservoir to generate a liquid detergent concentrate; (b) collecting the liquid detergent concentrate in a liquid detergent concentrate reservoir; (c) withdrawing liquid detergent concentrate from the liquid detergent concentrate reservoir and combining the liquid detergent concentrate with water to provide a use solution; and (d) washing the vehicle with the use solution.
Brief Description of the Drawings Figure 1 is a perspective view of a device for generating a liquid detergent concentrate from a solid detergent according to the principles of the invention.
Figure 2 is a front view of the device for generating a liquid detergent concentrate from a solid detergent of Figure 1 with the door open showing the internals of the device.
. Figure 3 is a partial cut-away view of the device for generating a liquid detergent concentrate from a solid detergent of Figure 1.
Figure 4 is a schematic diagram of an apparatus for applying a detergent use solution to a vehicle according to the principles of the invention.
Figure 5 is a schematic diagram of a device for generating an aqueous detergent composition from a solid detergent utilizing multiple detergents.
Figures 6(a) and 6(b) are exeniplaiy 'control logic diagrams for operating the device for generating a liquid detergent concentrate from a solid detergent according to the principles of the invention.
Detailed Description Now referring to Figures 1-3, a device for generating a liquid detergent concentrate from a solid detergent according to the invention is shown at reference numeral 10. The device for generating a liquid detergent concentrate from a solid detergent 10 can be referred to more simply herein as the "device."
The
3 device 10 includes a concentrated detergent reservoir 12, a stock solution reservoir 14, a water inlet line 16, a stock solution outlet line 18, and a processing unit 20.
The processing unit 20 controls the operation of the device 10. The processing unit 20 receives information about the conditions within the stock solution reservoir 14 and instnicts other components of the aqueous detergent generating device 10 to generate or stop generating stock solution depending upon the conditions within the stock solution reservoir 14.
The concentrated detergent reservoir 12 includes a detergent guide 30 having an inner surface 31 that holds the solid detergent in place within the concentrated detergent reservoir 12. The concentrated detergent reservoir 12 additionally includes a support member 32 for holding the detergent within the concentrated detergent reservoir 12. The support member 32 is preferably provided in the form of a screen 33 that allows water and aqueous detergent to flow therethrough. Accordingly, the detergent provided within the concentrated detergent reservoir 12 is contained by the detergent guide 30 and the support meinber 32.
The concentrated detergent provided within the detergent guide 30 is preferably a solid 29 provided in the form of solid blocks 34. A plurality of solid blocks 34 can be arranged within the concentrated detergent reservoir 12. The screen 33 is provided to support the blocks 34 and to allow concentrated aqueous detergent 36 to flow out of the concentrated detergent reservoir 12 and into the stock solution reservoir 14. Preferably, a water stream 38 is directed against the exposed surface 40 of the block 34. It should be appreciated that the term "exposed surface"
refers to the portion of the concentrated detergent against tivhich a water stream is directed and becomes degraded as the water stream removes the detergent. The exposed surface 40 shown in Figure 3 is the bottom surface of the lowest block that is degraded as the water stream 38 is directed against it. As the aqueous detergent 36 is generated, the height of the stack of blocks 34 deteriorates and new blocks 37 can be added at the opening 42. Preferably, a cover 44 is provided for covering the opening 42. Preferably, the concentrated detergent reservoir 12 is sufficiently enclosed to contain the detergent concentrate generated therein.
It should be understood that the sotirce that provides the water could be any source of water including recycled water, municipal water, well water, pond water, etc.
The
The processing unit 20 controls the operation of the device 10. The processing unit 20 receives information about the conditions within the stock solution reservoir 14 and instnicts other components of the aqueous detergent generating device 10 to generate or stop generating stock solution depending upon the conditions within the stock solution reservoir 14.
The concentrated detergent reservoir 12 includes a detergent guide 30 having an inner surface 31 that holds the solid detergent in place within the concentrated detergent reservoir 12. The concentrated detergent reservoir 12 additionally includes a support member 32 for holding the detergent within the concentrated detergent reservoir 12. The support member 32 is preferably provided in the form of a screen 33 that allows water and aqueous detergent to flow therethrough. Accordingly, the detergent provided within the concentrated detergent reservoir 12 is contained by the detergent guide 30 and the support meinber 32.
The concentrated detergent provided within the detergent guide 30 is preferably a solid 29 provided in the form of solid blocks 34. A plurality of solid blocks 34 can be arranged within the concentrated detergent reservoir 12. The screen 33 is provided to support the blocks 34 and to allow concentrated aqueous detergent 36 to flow out of the concentrated detergent reservoir 12 and into the stock solution reservoir 14. Preferably, a water stream 38 is directed against the exposed surface 40 of the block 34. It should be appreciated that the term "exposed surface"
refers to the portion of the concentrated detergent against tivhich a water stream is directed and becomes degraded as the water stream removes the detergent. The exposed surface 40 shown in Figure 3 is the bottom surface of the lowest block that is degraded as the water stream 38 is directed against it. As the aqueous detergent 36 is generated, the height of the stack of blocks 34 deteriorates and new blocks 37 can be added at the opening 42. Preferably, a cover 44 is provided for covering the opening 42. Preferably, the concentrated detergent reservoir 12 is sufficiently enclosed to contain the detergent concentrate generated therein.
It should be understood that the sotirce that provides the water could be any source of water including recycled water, municipal water, well water, pond water, etc.
The
4 portion of the concentrated detergent reservoir 12 where the stock solution 52 is generated can be referred to as the stock solution generating region 43.
New solid blocks 37 can be added to the concentrated detergent reservoir 12 through the opening 42. The new solid blocks 37 are preferably provided in a container 39. The container 39 is preferably a bucket 41. The combination of the new solid block 37 and bucket 41 can be inverted as shown in Figure 3 and introduced into the concentrated detergent reservoir 12. The lip 46 of the bucket 41 is preferably constructed so that it rests on the top edge 47 of the detergent guide 30. The detergent reservoir 12 includes an outer wall 48 that contains the detergent guide 30 and the bucket 41 within the concentrated detergent reservoir 12. As the bucket lip 46 rests on the edge 47, the solid block 37 can fall out of the bucket 41 and is guided by the detergent guide 30 so that it sits on top of a lower solid block 34. The bucket 41 can then be removed from the concentrated detergent reservoir 12 and discarded. An advantage of this technique for introducing solid blocks into the concentrated detergent reservoir'12 is that operator contact of the solid blocks 34 can be avoided.
The stock solution reservoir 14 includes a container 50 for holding the stock solution 52, and a sensor 54 for sensing the amount of stock solution 52 provided within the container 50. When additional stock solution 52 is desired, the sensor 54 provides a signal indicating that additional stock solution 52 needs to be prepared. When the container 50 contains a sufficient amount of stock solution 52, the sensor 54 provides a signal indicating that no additional stock solution 52 needs to be prepared. The sensor 54 includes a low level sensor 56 and a high level sensor .58. The low lever sensor 56 is triggered when the level of the stock solution decreases to a level that reflects a need for additional stock solution to be prepared.
The high level sensor 58 is triggered when the level of the stock solution 52 is at a sufficiently high level that additional stock solution need not be prepared.
The stock solution reservoir 14 includes a stock solution inlet 59 that allows stock solution 52 to enter into the container 50, and a stock solution outlet 60 that is provided for drawing stock solution 52 out of the container 50. The stock solution 52 can be piunped or aspirated out of the container 50 and then combined
New solid blocks 37 can be added to the concentrated detergent reservoir 12 through the opening 42. The new solid blocks 37 are preferably provided in a container 39. The container 39 is preferably a bucket 41. The combination of the new solid block 37 and bucket 41 can be inverted as shown in Figure 3 and introduced into the concentrated detergent reservoir 12. The lip 46 of the bucket 41 is preferably constructed so that it rests on the top edge 47 of the detergent guide 30. The detergent reservoir 12 includes an outer wall 48 that contains the detergent guide 30 and the bucket 41 within the concentrated detergent reservoir 12. As the bucket lip 46 rests on the edge 47, the solid block 37 can fall out of the bucket 41 and is guided by the detergent guide 30 so that it sits on top of a lower solid block 34. The bucket 41 can then be removed from the concentrated detergent reservoir 12 and discarded. An advantage of this technique for introducing solid blocks into the concentrated detergent reservoir'12 is that operator contact of the solid blocks 34 can be avoided.
The stock solution reservoir 14 includes a container 50 for holding the stock solution 52, and a sensor 54 for sensing the amount of stock solution 52 provided within the container 50. When additional stock solution 52 is desired, the sensor 54 provides a signal indicating that additional stock solution 52 needs to be prepared. When the container 50 contains a sufficient amount of stock solution 52, the sensor 54 provides a signal indicating that no additional stock solution 52 needs to be prepared. The sensor 54 includes a low level sensor 56 and a high level sensor .58. The low lever sensor 56 is triggered when the level of the stock solution decreases to a level that reflects a need for additional stock solution to be prepared.
The high level sensor 58 is triggered when the level of the stock solution 52 is at a sufficiently high level that additional stock solution need not be prepared.
The stock solution reservoir 14 includes a stock solution inlet 59 that allows stock solution 52 to enter into the container 50, and a stock solution outlet 60 that is provided for drawing stock solution 52 out of the container 50. The stock solution 52 can be piunped or aspirated out of the container 50 and then combined
5 with a high-pressure water line for delivery as a detergent use solution for washing a substrate or surface such as the surface of a motor vehicle.
The water inlet line 16 is shown extending through the stock solution reservoir 14 and is provided with a nozzle 62 for directing water against the exposed surface 40 of the block 35. It should be appreciated that the water inlet line 16 need not extend through the stock solution reservoir 14. That is, the water inlet line 16 can be provided outside of the stock solution reservoir 14 but it is appropriate to have the water provided by the water inlet line directed against the solid detergent within the concentrated detergent reservoir 12 to generate the stock solution 52.
It is an advantage of the invention that the concentration of the stock solution 52 can be maintained at a relatively constant level for a given solid detergent composition. That is, by controlling certain parameters, such as, the distance 70 between the nozzle 62 and the exposed surface 40, the area of the exposed surface 40, the temperature of the water stream 38, the pressure of the water streani 38 against the exposed surface 40, the duration of application of the water stream 38 against the exposed surface 40, the volume of the container 50, and the opening sizes provided by the support member 32. By controlling these parameters to specific values, it is believed that the concentration of the stock solution 52 will remain relatively constant for a particular solid detergent composition. It should be appreciated that the concentration of the stock solution 52 can vary as the chemistry of the solid detergent andlor the water stream 38 vary. For example, the solid detergent can be provided so that degrades more or less easily in the presence of water, and the water chemistry may vary from one location to another location, or may include additives that affect the rate of degradation of the solid detergent.
The container 50 is preferably sized to reduce fluctuations in the concentration of the stock solution 52 and to provide a sufficient amount of stock solution for a given wash application. In general, if the volume of the container is too small, it is expected that the concentration of the stock solution may vary to an extent that it is not desirable. Although a larger container volunie may be desirable to moderate fluctuations in concentration, it should be understood that a larger volume of the container may require an increased heating capacity of the water heater 110. This is particularly a concern during start up when charging the
The water inlet line 16 is shown extending through the stock solution reservoir 14 and is provided with a nozzle 62 for directing water against the exposed surface 40 of the block 35. It should be appreciated that the water inlet line 16 need not extend through the stock solution reservoir 14. That is, the water inlet line 16 can be provided outside of the stock solution reservoir 14 but it is appropriate to have the water provided by the water inlet line directed against the solid detergent within the concentrated detergent reservoir 12 to generate the stock solution 52.
It is an advantage of the invention that the concentration of the stock solution 52 can be maintained at a relatively constant level for a given solid detergent composition. That is, by controlling certain parameters, such as, the distance 70 between the nozzle 62 and the exposed surface 40, the area of the exposed surface 40, the temperature of the water stream 38, the pressure of the water streani 38 against the exposed surface 40, the duration of application of the water stream 38 against the exposed surface 40, the volume of the container 50, and the opening sizes provided by the support member 32. By controlling these parameters to specific values, it is believed that the concentration of the stock solution 52 will remain relatively constant for a particular solid detergent composition. It should be appreciated that the concentration of the stock solution 52 can vary as the chemistry of the solid detergent andlor the water stream 38 vary. For example, the solid detergent can be provided so that degrades more or less easily in the presence of water, and the water chemistry may vary from one location to another location, or may include additives that affect the rate of degradation of the solid detergent.
The container 50 is preferably sized to reduce fluctuations in the concentration of the stock solution 52 and to provide a sufficient amount of stock solution for a given wash application. In general, if the volume of the container is too small, it is expected that the concentration of the stock solution may vary to an extent that it is not desirable. Although a larger container volunie may be desirable to moderate fluctuations in concentration, it should be understood that a larger volume of the container may require an increased heating capacity of the water heater 110. This is particularly a concern during start up when charging the
6 container 50 for the first time. Preferably, the volume of the container 50 is greater thari about one liter, and less than about 20 liters. More preferably, the volume of the container is between about four liters and about 12 liters, and even more preferably between about six liters and about ten liters. It should be understood that the volume of the container 50 refers to the amount of the stock solution 52 that can be contained therein during operation of the device 10.
It is desirable to provide a relatively constant distance between the nozzle 62 and the exposed surface 40 of the stack of blocks 34. That is, as stock solution 52 is prepared by degradation of the solid detergent, the stack of blocks continue to move downward so that the exposed surface 40 remains the same distance away from tlie nozzle 62. Preferably, the spray pattern of the water 38 is provided so that the exposed surface 40 of the lowest block 3 5 degrades relatively, uniformly across the surface area. It should be understood that the reference to degradation reflects the solubilization of the detergent. The distance between the nozzle 62 and the exposed surface 40 is preferably a function of the nozzle spray angle and is preferably provided so that the entire exposed surface is wetted.
Preferably, the distance between the nozzle 62 and the exposed surface 40 is between about two inches and about 12 inches, and more preferably between about three inches and about six inches.
Stock solution 521eaves the stock solution reservoir 14 via the stock solution outlet 60 and passes through the stock solution outlet line 18. The stock solution 52 can then be used as a detergent use solution or the stock solution 52 can be further diluted with a water stream for generating a detergent use solution. It is expected that in most vehicle washing facilities, the stock solution 52 will be injected into a water stream that is then sprayed against the surface of a motor vehicle to clean the surface of the motor vehicle. It should be appreciated that stock solution 52 and/or the resulting detergent use solution can be used to clean the surface of any article requiring cleaning.
Now referring to Figure 2, the door 102 of the device 10 for generating a liquid detergent concentrate from a solid detergent is opened revealing the internal components 104. It should be appreciated that the flexible tubing connecting the various internal components 104 have been removed in this figure in.
It is desirable to provide a relatively constant distance between the nozzle 62 and the exposed surface 40 of the stack of blocks 34. That is, as stock solution 52 is prepared by degradation of the solid detergent, the stack of blocks continue to move downward so that the exposed surface 40 remains the same distance away from tlie nozzle 62. Preferably, the spray pattern of the water 38 is provided so that the exposed surface 40 of the lowest block 3 5 degrades relatively, uniformly across the surface area. It should be understood that the reference to degradation reflects the solubilization of the detergent. The distance between the nozzle 62 and the exposed surface 40 is preferably a function of the nozzle spray angle and is preferably provided so that the entire exposed surface is wetted.
Preferably, the distance between the nozzle 62 and the exposed surface 40 is between about two inches and about 12 inches, and more preferably between about three inches and about six inches.
Stock solution 521eaves the stock solution reservoir 14 via the stock solution outlet 60 and passes through the stock solution outlet line 18. The stock solution 52 can then be used as a detergent use solution or the stock solution 52 can be further diluted with a water stream for generating a detergent use solution. It is expected that in most vehicle washing facilities, the stock solution 52 will be injected into a water stream that is then sprayed against the surface of a motor vehicle to clean the surface of the motor vehicle. It should be appreciated that stock solution 52 and/or the resulting detergent use solution can be used to clean the surface of any article requiring cleaning.
Now referring to Figure 2, the door 102 of the device 10 for generating a liquid detergent concentrate from a solid detergent is opened revealing the internal components 104. It should be appreciated that the flexible tubing connecting the various internal components 104 have been removed in this figure in.
7 order to more clearly illustrate the invention. During operation of the device 10, the tubing is provided.
Water enters the device 10 at water inlet 106. The port for water inlet 106 is on the backside 108 of the device 10 and is not shown in Figure 2.
Water enters the inlet 106 and flows to the hot water heater 110 where it is heated to a desired temperature. Relief line 112 is provided ass relief line to protect the hot water heater. A relief valve is provided within the relief line 112 and opens when the temperature and/or pressure conditions within the hot water heater 110 exceed desired limits. Preferably, the relief valve opens when the water temperature within the hot water heater 110 exceeds 200 F and/or when the pressure within the hot water heater exceeds 1001bs.
Heated water flows out of the hot water heater 110 via hot water outlet 114 and flows into the water inlet line 16. The flow of hot water out of the hot water heater 110 is controlled by the water regulator 116.
Stock solution 52 flows out of the container 50 via the stock solution outlet 60 and the stock solution outlet line 18. The device 10 includes a stock solution pump 120 that pumps the stock solution into a water stream or pumps the stock solution 52 into a venturi where it is then aspirated into a water stream. It should be understood that the device 10 might onlit the stock solution pump when the stock solution 52 is aspirated. In the situation where the stock solution is aspirated into a water line, it may be desirable to provide a metering device such as a valve (e.g. a needle valve), an orifice, or restrictive tubing, to adjust the flow rate of stock solution into the water stream. The stock solution pump 120 includes a stock solution inlet 122 and a stock soltition outlet 124. In addition, the stock solution pump 120 includes an air inlet 126 for powering the stock solution pump 120.
It should be understood that the stock solution pump 120 could be powered by electrical energy if it is more eonvenient to use electrical energy rather than a compressed air source as a power source.
An atmospheric vacuum breaker 130 is provided for backflow prevention to avoid siphoning of stock solution 52 into the city water supply.
Water enters the device 10 at water inlet 106. The port for water inlet 106 is on the backside 108 of the device 10 and is not shown in Figure 2.
Water enters the inlet 106 and flows to the hot water heater 110 where it is heated to a desired temperature. Relief line 112 is provided ass relief line to protect the hot water heater. A relief valve is provided within the relief line 112 and opens when the temperature and/or pressure conditions within the hot water heater 110 exceed desired limits. Preferably, the relief valve opens when the water temperature within the hot water heater 110 exceeds 200 F and/or when the pressure within the hot water heater exceeds 1001bs.
Heated water flows out of the hot water heater 110 via hot water outlet 114 and flows into the water inlet line 16. The flow of hot water out of the hot water heater 110 is controlled by the water regulator 116.
Stock solution 52 flows out of the container 50 via the stock solution outlet 60 and the stock solution outlet line 18. The device 10 includes a stock solution pump 120 that pumps the stock solution into a water stream or pumps the stock solution 52 into a venturi where it is then aspirated into a water stream. It should be understood that the device 10 might onlit the stock solution pump when the stock solution 52 is aspirated. In the situation where the stock solution is aspirated into a water line, it may be desirable to provide a metering device such as a valve (e.g. a needle valve), an orifice, or restrictive tubing, to adjust the flow rate of stock solution into the water stream. The stock solution pump 120 includes a stock solution inlet 122 and a stock soltition outlet 124. In addition, the stock solution pump 120 includes an air inlet 126 for powering the stock solution pump 120.
It should be understood that the stock solution pump 120 could be powered by electrical energy if it is more eonvenient to use electrical energy rather than a compressed air source as a power source.
An atmospheric vacuum breaker 130 is provided for backflow prevention to avoid siphoning of stock solution 52 into the city water supply.
8 The controller 20 is provided for receiving signals from the sensor 54 and, based upon those signals, regulating the flow of heated water out of the hot water heater 110 for generating stock solution -52.
The amount of stock solution 52 introduced into the water streain to provide a detergent use solution is controlled by the requirements of the facility that utilizes the device 10. In the case of a commercial vehicle washing facility, the facility will instruct the device 10 of the requirements when stock solution 52 is required, and the pump 120 will respond by injecting desired amounts of the stoek solution into a water stream to create a detergent use solution. If the stock solution 52 is aspirated into a water supply, it is believed that the rate of aspiration will be controlled by a valve placed between the stock solution reservoir 14 and the pressurized water line.
The air flow for powering the stock solution pump 120 is regulated by the air regulator 132 and the air valve solenoid 134 when a signal is provided from the washing facility that additional detergeint is needed, the air valve solenoid 134 responds by opening the air inlet 126 to the stock solution pump 120 causing the stock solution pump 120 to inject stock solution 52 into the water line to create detergent use solution. The drain air filter 136 is preferably provided to remove moisture from the airline to prevent damage to the stock solution pump 120.
The hot water heater 110 preferably controls the temperature of the water to provide a relatively constant water temperature that is sprayed from the nozzle 62. Preferably, the water temperature is provided within a range of about 40 F to about 150 F, and more preferably between about 80 F and about 140 F.
It should be understood that the target temperature can be controlled and depends upon the desired concentration in the stock solution and on the chemistry of the solid detergent. A temperature sensor can-be provided for sensing the temperature of the water sprayed from the nozzle 62. This sensed temperature can be used to adjust the hot water heater 110 to provide a desired water temperature.
The temperature of the water sprayed against the exposed surface 40 is preferably controlled to a relatively constant temperature. In general, the phrase "relatively constant temperature" refers to a temperature fluctuation range that is controlled to provide a relatively consistent concentration of stock solution 52.
The amount of stock solution 52 introduced into the water streain to provide a detergent use solution is controlled by the requirements of the facility that utilizes the device 10. In the case of a commercial vehicle washing facility, the facility will instruct the device 10 of the requirements when stock solution 52 is required, and the pump 120 will respond by injecting desired amounts of the stoek solution into a water stream to create a detergent use solution. If the stock solution 52 is aspirated into a water supply, it is believed that the rate of aspiration will be controlled by a valve placed between the stock solution reservoir 14 and the pressurized water line.
The air flow for powering the stock solution pump 120 is regulated by the air regulator 132 and the air valve solenoid 134 when a signal is provided from the washing facility that additional detergeint is needed, the air valve solenoid 134 responds by opening the air inlet 126 to the stock solution pump 120 causing the stock solution pump 120 to inject stock solution 52 into the water line to create detergent use solution. The drain air filter 136 is preferably provided to remove moisture from the airline to prevent damage to the stock solution pump 120.
The hot water heater 110 preferably controls the temperature of the water to provide a relatively constant water temperature that is sprayed from the nozzle 62. Preferably, the water temperature is provided within a range of about 40 F to about 150 F, and more preferably between about 80 F and about 140 F.
It should be understood that the target temperature can be controlled and depends upon the desired concentration in the stock solution and on the chemistry of the solid detergent. A temperature sensor can-be provided for sensing the temperature of the water sprayed from the nozzle 62. This sensed temperature can be used to adjust the hot water heater 110 to provide a desired water temperature.
The temperature of the water sprayed against the exposed surface 40 is preferably controlled to a relatively constant temperature. In general, the phrase "relatively constant temperature" refers to a temperature fluctuation range that is controlled to provide a relatively consistent concentration of stock solution 52.
9 Preferably, the temperature of the tivater is controlled to within about 30 F, and more preferably to within about 10 F. In a preferred steady state operation, the water temperature is controlled to within about 5 F. It should be understood that the term "steady state" refers to the teniperature conditions after initial heating of cooled equipnient such as piping.
The water sprayed from the nozzle 62 is preferably provided at a relatively low pressure and wets the ~exposed surface 40 of the lowest block 35.
Preferably, the pressure of the water:=from the nozzle 62 is between about 10 psig and about 40 psig.
The support member 32 is provided so that it allows water and stock solution to flow therethrough. If desired, the openings in the support member can be sufficiently small to control the flovc% of undissolved particulates therethrough.
Preferably, the support member 32 is provided -in the form of a screen having a niesh size of between about 1116 sq. in. and about 4 sq. in., and more preferably between about 1 sq. in. and about 2 sq. in. It:should be understood that the support member 32 can be used to help block flow of water to the solid block 34 and to help prevent flow of undissolved particulates frona 'the solid :block 34 to the container 50.
The device 10 can be provided having a housing 150 that encloses the intemal components 104. Access to- 'the internal components 104 can be provided through the door 102 that can be locked in place or unlocked using the lock 152.
The device 10 can be provided as a freestanding device or can be attached to another structure. As shown, the device 10 iiieludes legs 154 for supporting the device. An on/off switch 156 can be provided for powering the device 10. Preferably, a spring 160 is provided for biasing the lid or _cover 44 in a closed position as shown in Figure 2.
The detergent use solution genekated according to the invention can be used in conunercial vehicle washing facilities to wash motor vehicles such as automobiles, trucks, sports utility vehicles, and boats. An exemplary cleaning a7rm apparatus used in commercial vehicle washing facilities is shown at reference numeral 200 in Figure 4. The eleaniiig arm apparatus 200 includes a spray arch that is provided so that it extends around a vehicle provided within the interior area 204. A wash cycle generally involvcs:delivery _af the detergent use solution 208 to the vehicle from the front of the vehicle to the: rear of the vehicle or vice versa. The spray arch 202 includes a plurality of spray nozzles 206 that direct detergent use solution 208 onto the exterior of the vehicle during a wash cycle. The detergent use solution 208 is provided to the spray arch 202:.via the delivery line 210 and is provided under pressure. The detergent use solution 208 is prepared by mixing a liquid detergent concentrate 212 and water 214 in a mixing valve 216. The water 214 flows through the water source line 220, into the pump 222, and is forced out of the pump 222 under pressure into the water liri.e 224 and into the mixing valve 216.
The liquid detergent concentrate 212 flows through the liquid detergent concentrate source line 228, through the chemical pump 230, and are forced from the chemical pump 230 under pressure into the liquid detergent line 232. The liquid detergent concentrate 212 can be made available as the liquid detergent concentrate stock solution. It should be understood that the chemical pump 230 could be omitted if the liquid detergent concentrate 212 is aspirated into the high-pressure water line. In addition, it should be understood that the chemical punip 230 can be used to pump the liquid detergent concentrate 212 irito a venturi so that the liquid detergent concentrate 212 then becomes mixed with the high pressure water.
The cleaning arm apparatus 200: may be employed in a conveyor type or a bay automatic type vehicle washing system. In the conveyor setup, often referred to as a tunnel wash, the spray arch 202 is stationary and the vehicle to be washed is moved through the device either by a conveyor or by driving the car therethrough along a predetermined path. In the bay automatic setup, or rollover type apparatus, the spray arch 202 is mounted on wheels for movement along a predetermined path wherein the rollover device is moved forwardly and backwardly over a stationary vehicle to wash the vehicle. In addition, both of the above-described types of vehicle washing devices may be employed in a frictionless or touchless mode wherein high-pressure 'wash and rinse cycles are utilized so that no cleaning components touch the vehicle or in a touching mode wherein the cleaning components touch the vehicle.
The detergent concentrate 212 is'preferably provided containing about 0.5 wt.% to about 25 wt.%. of active components, and more preferably about 1 wt.% to about 20 wt.%. It should be understood that the active components are those components that contribute to 6e cleaning, polishing, and/or drying properties of the composition.. In general, water is not considered an active component.
The detergent concentrate is preferably injected into a water stream or mixed with water in mixing valve 216. Thd mixing valve can be referred to as a mixing bowl or tee and can include a structure. sufficient to generate turbulent flow to enhance mixing. Sources of water include potable water, recycled water, and an aqueous solution. If the water is excessively high in hardness, then the water may be lreated with a water softener before it is mixed with the liquid detergent concentrate.
The active ingredient level applied to the vehicle in the detergent use solution is preferably between about 0.03 wt.% and 1 wt.%o. When the detergent use solution is applied to the vehicle, it is desirable that the level of active ingredient is consistent during the wash cycle across the entire vehicle.
The detergent use solution is preferably applied to vehicles in commercial vehicle washing facilities under ari application pressure of between about 50 psig to about 300 psig. The: chemical;Tump 230 and the water pump 222 may operate at any pressure to achieve the desi'red pressure range. In one embodiment, the water is supplied to;the mixing valve 216 without using a water pump, and merely using the water pressure of the municipality supplied system.
Typical water pressures supplied by*a municipality are from about 15 psi to about 50 psi. Desirably, the water is supplied through a putnp 222 to achieve a detergent use solution application pressure of frorriabout 50 ~si to about 300 psi. In lieu of a chemical pump, the liquid detergent concentrate maybe supplied to the mixing valve 216 using an aspirator.
Now referring to Figure 5, an alternative arrangement of the invention is indicated at reference numeral 300i In this arrangement, several devices for generating a liquid detergent concentrate fronl a solid detergent are arranged in parallel. Water 302 enters the water pump 304 via the line 306, and leaves the water pump 304 as high-pressure water 308',via the high-pressure line 310. The high-pressure water 308 then combines :witli cleaning chemicals to provide a use solution 312 that is conveyed to a spray arch'via the use 'solution line 314.
The apparatus 300 is'shown for generating multiple use solutions, That is, the apparatus 300 can be used to provide multiple cycles for washing a . . y ',::i .
vehicle, or it can be used to provide different'cleaning cycles. For example, it may be desirable to provide a first wash cycle using a first cleaning detergent 320. In this case, the valve 322 is opened allowing the higli-pressure water 308 to combine with the first cleaning detergent 320 in the inixing valve 324. The resulting use solution 326 then flows to the spray arch.. A second cleaning cycle may involve use of a second detergent concentrate 330. In this case, the valve 334 is opened allowing high pressure water 308 to mix with the second cleaning detergent 330 in the mixing .
valve 336 to provide a second use solution 338. Finally, it may be desirable to provide another cleaning cycle utiliziiig a protectant 340. In this case, the valve 342 is opened allowing the high-pressure water 308 to combine with the protectant in the mixing valve 344 to provide the 'use solution 312.
It should be appreciated that the chemicals provided for the apparatus, 300 can be used in combination or individually in a cleaning cycle. In addition, additional eheniieals can be used:to'prcivide additional cycles or to combine with certain other chemicals to provide desired cleaning cycles.
Now referring to Figures 6(a) and 6(b), logic diagrams are provided showing an exemplary car wash cycle for a conveyor setup (Figure 6(a)) and for an in bay automatic set up (Figure 6(b)).
SOLID DETERGEN'f Solid detergents that cati be used according to the invention include those detergents that degrade when cojilacted with water to provide an aqueous detergent composition. An advantage to providing the detergent composition in a solid form is that it is possible to provide a high concentration of cleaning components. Suitable solid detergerit forms include cast or compressed solid blocks, briquettes, powders, granular material, pellets, tablets, flakes, and gels.
The cleaning components of the:detergent composition are genezally referred to as the active ingredient components :("actives" or "active components").
The components of the detergent coinposition that do not significantly effect cleaning properties can be referred to as non-active components. Exemplary active components include alkaline builders, acidic builders, surfactants, corrosion inhibitors, anti-redeposition agents, Chelating agents, sequestrants, dyes, and fragrances. Exemplary non-active components Include water, certain solidifying agents, and certain processing aids: It should be understood that many solidifying agents and processing aids can be considered active components if they contribute to cleaning properties.
The solid detergents that can be used according to the invention include those solid detergents that contain a sufficient amount of active components so that the resulting aqueous detergent can be used to clean the surface of vehicles.
A preferred application of the detergerit is in the cornmercial vehicle washing industry. Accordingly, the types of soil desired to be removed by the detergent composition include those soils normally encountered on the surface of vehicles and normally removed by commercial vehicle washing facilities.
Solidifying agent Solid detergent compositions that can be used according to the invention preferably include a sufficient amount of a component responsible for solidifying the conlposition ("solidifying agent") to provide a solid detergent. In general, it is desirable to use an amount of solidifying agent responsible for solidifying the composition that is sufficient to provide solidification. If too little of the solidifying agent is used, the detergent is generally not sufficiently solid and may be too soft and may not degrade it a relatively constant rate. If too much of the solidifying agent is used, it is expected;that the detergent composition may sacrifice active ingredient cleaning components :at the expense of the solidifying component, and may result in a composition that is':too hard and does not degrade sufficiently well when contacted with water.
One suitable type of solidifying agent includes polyethylene glycol and mixtures of different molecular weight polyethylene glycols. When polyethylene glycol or mixtures of different molecular weight polyethylene glycols are used as solidifying agents, they are ~referably provided in an amount of at least about 5 wt. !o, and are preferably used in an amount equal to or less than about 55 wt.%. More preferably, the amount-of polyethylene glycol or mixture of polyethylene glycols provided in the solid detergent composition is from about wt.% to about 30 wt.%. It shouldbe uriderstood that the discussion of weight percent in the context of the solid :detergent refers to the weight percent of a component based upon the weight of the solid detergent.
; , . : - .
Another suitable solidifyirig agen,t is urea. When urea is used as a solidifying agent, it is preferably provided in ari amount from about 5 wt.%
to about 32 wt.%, and more preferably in an amount of from about 8 wt.% to about 26 wt.%.
The solid detergent may also include a hydrate-type of solidifying agent. In general, it is understood that a hydrate-type solidifying agent generally pulls water away from other components in the detergent composition thereby causing solidification.
When a hydrate is used as a solidifying agent; it is preferably used in an amount from about 6 wt.% to about 60 wt.%, and inore preferably in an amount from about 8 wt.% to about 50 wt.%. In addition, it should be understood that solidifying agents that can be used according to the invention may or may not be considered active components. That is, if the solidifying agent used is one that enhances the detersive nature of the detergent composition, it should be considered an active component.
Another preferred solidifyifig agent is one that forms a hydrate of a metal hydroxide or carbonate. The solidifying agent may provide for controlled dispensing by using solidification agents which having increased aqueous solubility.
For systenls that require less aqueous solubility or a slower rate of dissolution an organic nonionic or amide hardening agent may'be appropriate. For a higher degree of aqueous solubility, an inorganic solidificatiori agent or a more soluble organic agent such as urea can be used.
Furthermore, surfactants may be used to vary the hardness and solubility. Such surfactants include amides such as stearic monoethanolamide, lauric diethanolamide, and stearic diethanolamide. Nonionic surfactants have also been found to impart varying degrees of hardness and solubility when combined with a coupler such as propylene glycol or polyethylene glycol.
Alkaline and Acid Builders The solid detergent composition preferably includes a sufficient amount of alkaline builder andlor acidic builder to provide desired properties.
Preferably, the builders are provided in the soliddetergent composition in an amount from about 1 wt.% to about 80 wt.%o, and more preferably from about 3 wt.% to about 70 wt.%. : . :
The alkalinity builder in the coniposition can be any alkalinity. builder known that is compatible with the other components of the composition being used.
Suitable alkaline sources or mixtures thereof useful in the present invention are those capable of providing the desired pH. Alkalinity sources can comprise, for example, inorganic alkalinity sources, such as-an alkali metal hydroxide, an alkali metal salt, or the like, or mixtures thereof.
Suitable alkali metal hydroxides ~include those generally known that are compatible with the other components of the composition being used. Some examples include sodium or potassium hydroxide, and the like. An alkali metal hydroxide may be added to the composition iri a variety of fornis, including for example in the fonn of solid beads; dissolved in! an aqueous solution, or a combination thereof. Alkali metal :hydroxides:aie commercially available as a solid in the form of prilled solids or beads having a mix of particle sizes ranging fiom about 12-100 U.S. mesh, or as an aqueous solution, as for example, as a 50 wt%
and a 73 wt% solution.
Suitable alkali nZetal salts iriclude those generally known that are compatible with the other components of the composition being used. Some examples of alkali metal salts include alkali metal carbonates, silicates, phosphonates, sulfates, borates, acetates, citrates, tartrates, succinates, edates, and the like, and mixtures thereof. Some examples include potassium and sodium carbonates and bicarbonates. The carbonate salts include, for example, potassium carbonate, potassium carbonate dihydrate, potassium carbonate trihydrate, sodium carbonate, sodium carbonate decahydrate, sodium carbonate heptahydrate, sodium carbonate monohydrate, sodium sesquicarbonate, and the double salts and mixtures thereof. The bicarbonate salts include, for example, potassium bicarbonate and sodium bicarbonate and mixtures thereof. Other: exaniples include the alkali metal ortho or complex phosphates. Examples of alkali metal orthophosphates include trisodium or tripotassium orthophosphate. The complex phosphates are especially effective because of their ability to chelate water:hardness and heavy metal ions.
The complex phosphates include, for example, sodium or potassium pyrophosphate, tripolyphosphate and hexametaphosphates..
Other examples of alkalirie builders include ethanolamines and amines; silicates; and other like alkaline sources. Exemplary acid builders include poly(acrylic acid), butane(tri.carboxylic acid), Thosphonic acid, and mixtures thereof.
Surfactants Surfactants are preferably useddn the solid detergent to provide detersive properties. The solid detergent preferably includes a surfactant or a mixture of surfactants in an amount from about 1 wt.% to about 80 wt.%, and more preferably from about 5 wt.% to about65 wt.%o: Exemplary surfactants that can be used according to the invention include anionic surfactants, nonionic surfactants, amphoteric surfactants, cationic surfactants, arid mixtures thereof.
Anionic surfactants are usually ;defined by the fact that the surface-active segment of the molecule is anionic. Tho anionic surfactant is usually in the form of a salt, but may also be Zwitterioriic or an internal salt. Examples include, but are not limited to sulfonates such as linear alkyl benezene sulfonate and alpha olefin sulfonate, sulfates such as lauryl sulfate and lauryl ether sulfate, natural soaps, and phosphate esters. Further examples include dimmers, trimers, oligomers, polymers (copolymers, graft polymers; block polymers, etc.) having anionic surfactant groups thereon, such as amine groups, phosphate groups, or other polar charge centers with hydrophilic and/or hydropliobic contribution segments. The surfactant normally contains both a hydrophilic and a hydrophobic center or segment in the molecule to be able to be soluble or dispersible in water, yet display oleophilicity (e.g., dispersing and/or dissolving:or attracting power) towards oils, grease, and other non-aqueous, oleophilic materials:
Further specific examples of suitable anionic surfactants are water-soluble salts of the higlier alkyl sulfates, such as 'sodium lauryl sulfate or other suitable alkyl sulfates having 8 to 18 carbon atoms in the alkyl group, water-soluble salts of higher fatly acid monoglyceride rnonosiilfates, such as the sodium salt of the monosulfated monoglyceride of hydrogenated coconut oil fatty acids, alkyl aryl sulfonates such as sodium dodecyl benzene sulfonate, higher alkyl sulfoacetates, higher fatty acid esters of 1,2-dihydroxy propaiie sulfonate, and the substantially saturated higher aliphatic acyl amides of lower..liphatic amino earboxylic acid :17 compounds, such as those having 12-'to -16 carbons in the fatty acid, alkyl or acyl radicals, and the like. Examples of the last mentioned amides are N-lauroyl sarcosinate, and the sodium, potassium,,and ethanolamine salts of N-lauroyl, N-myristoyl, or N-palmitoyl sarcosiriate. Also effective are polycarboxylated ethylene oxide condensates of fatty alcohols.
Exemplary nonionic surfactants include nonylphenoi ethoxylates, alcohol ethoxylates, ethylene oxide/propylene oxide block polymer surfactants, ethoxylated primary alkyl arnines, alkoxylated thiol surfactants, polyoxyethylene-polyoxypropylene condensates, which are sold.by BASF under the trade name "Pluronic", polyoxyethylene condensates-of aliphatic alcohols/ethylene oxide condensates having from 1 to 30 moles of ethylene oxide per mole of coconut alcohol; ethoxylated long chauz alcohols sold by Shell Chemical Co. under the trade name "Neodol", polyoxyethylene aondeiisates of sorbitan fatty acids, alkanolamides, such as the monoalkoanolamides, dialkaiiolamides and the ethoxylated alkanolamides, for example coconut monoethanolamide, laurie isopropanolamide and lauric dietlianolamide; and amiile oxides for example dodecyldimethylaniine oxide.
Zwitterionic or amphoteric surfactants useful with the invention include .beta.-N-alkylaminopropio.nic: acids, n-alkyl-.beta.-iminodipropionic acids, imidazoline carboxylates, n-alky-betaines; amine oxides, sulfobetaines and sultaines.
Cationic surfactants classes include polyoxyethylene tertiary alkylamines or alkenylamines, such as ethoxylated fatty amines, quaternary anunonitun surfactants and polyoxyetliylene alkyletlierarnines. Representative specific exainples of such cationic surfactants include polyoxyethylene (5) cocoamine, polyoxyethylene (15) tallowamine, distearyldimethylamnaoniurn chloride, N-dodecylpyridine chloride and polyoxypropylene (8) ethoxytrimethylariiinoniuin chloride. Many eationic quaternary amnioniuni surfactants of diverse structures are known in the art to be useful in the detergent solutions coriteinplated herein.
Corrosion Inhibitors:..
The solid detergent may also include corrosion inhibitors to provide corrosion resistance. Corrosion inhibitors.can be provided in an amount from about ;}8 0 to about 25 wt.%, and more prefer6bly1n an ainount from about 0.5 wt.% to about 20 wt.%.
Corrosion inhibitors which may be optionally added to the solid detergent include silicates, phosphate, magnesium and/or zinc ions.
Preferably, the metal ions are provided in a water-soluble form. Examples of useful water-soluble forms of magnesium and zinc ions are the water-soluble salts thereof including the chlorides, nitrates and sulfates of the -iespective metals.
Anti-redenosition, Chelating and Seauestering Agents The solid detergent composition may additionally include anti-redeposition agents, chelating agents; and sequestrants wherein these components are provided in an amount from about 0 to about 80 wt.%, and more preferably from about 0.5 wt.% to about 65 wt.%.
Generally, anti-redeposition agents and sequestrants are those molecules capable of complexing or coordinating the metal ions commonly found in service water and thereby preventing .the "metal ions from interfering with the functioning of detersive components within the composition. Any number of sequestrants maybe used in accordance with the invention. Representative anti-r.edeposition agents and sequestrants include salts of amino carboxylic acids, phosphonic acid salts, water-soluble acrylic polymers, among others.
The chelating agent in the composition can be any chelating agent known that is capable of complexing witli the mineraI ions in the solution in the desired manner, and that is compatible with the other components of the composition. Exemplary ehelating:agents include amino carboxylic acid clielating agents such as N-hydroxyethyliminodiaeetie acid, nitrilotriacetic acid (NTA), ethylenediaminetetraacetic acid (EDTA),'N-hydroxyethyJ.ethylenediaminetriacetic acid (HEDTA), and diethylenetrianiiriepentaacetic acid (DTPA).
Processing Aids The solid detergent cari be prepared utilizing a processing aid. In general, a processing aid refers to a component that assists in the formation of the solid detergent. One preferred processing aid that helps in the formation of a solid detergent includes propylene glycol:
i:g , : . .:
~.. ..
Hydrotropes are usefiit to maintain the organic materials, including the surfactant, readily dispersed in an aqueous cleaning solution and allow the user of the compositions to accurately provide the desired amount of the liquid detergent concentrate into the use solution. Example hydrotropes include the sodium, potassium, animonium and alkanol ainmonium salts of xylene, toluene, ethylbenzoate, isopropylbenzene, naphthalene, alkyl naphthalene sulfonates, phosphate esters of alkoxylated alkyl:phenols, phosphate esters of alkoxylated alcohols and sodium, potassium and ammonium salts of the alkyl sarcosinates.
= 20 Other Ingredients Other additives known for use in vehicle cleaning compositions and solutions may be employed. Such other additives may include, but are not limited to additional surfactants, hydrotropes, additional corrosion inhibitors, antimicrobials, fungicides, fragrances, dyes, antistatic agents, UV absorbers, reducing agents, buffering compounds, corrosion inhibitors, viscosity modifying (thickening or thinning) agents, and thelike.
In general, it is desirable to provide the solid detergent composition with as high an active level as possible. That is, by increasing the active level of the detergent composition, it is believed that it is possible to decrease the shipping costs associated with shipping a less concentrated detergent composition.
Preferably, the active level of the solid detergent composition is at least about 50 wt.%.
Preferably, the active concentration of the solid detergent composition is up to about 85 wt.%, and more preferably at least about 95 wt.%. Solid detergents containing an active concentration greater than 95 wt.% are desirable as long as the detergent can be provided in a solid form such as a block or pellet that will degrade at a desired rate when exposed to water.
Further, while the preferred embodiment of the invention will be described in combination with specific electronic control modules for providing control signals, it will be understood that other control circuits, including inechanical, hydraulic, digital, analog, radio frequency, and optical systems, could equally well be configured within the spirit and scope of this invention. It is also to be understood that the terminology used herein is for the purpose of describing particular embod'unents only and is not iritended to be limiting.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the inventiori. : Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed heiein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
The water sprayed from the nozzle 62 is preferably provided at a relatively low pressure and wets the ~exposed surface 40 of the lowest block 35.
Preferably, the pressure of the water:=from the nozzle 62 is between about 10 psig and about 40 psig.
The support member 32 is provided so that it allows water and stock solution to flow therethrough. If desired, the openings in the support member can be sufficiently small to control the flovc% of undissolved particulates therethrough.
Preferably, the support member 32 is provided -in the form of a screen having a niesh size of between about 1116 sq. in. and about 4 sq. in., and more preferably between about 1 sq. in. and about 2 sq. in. It:should be understood that the support member 32 can be used to help block flow of water to the solid block 34 and to help prevent flow of undissolved particulates frona 'the solid :block 34 to the container 50.
The device 10 can be provided having a housing 150 that encloses the intemal components 104. Access to- 'the internal components 104 can be provided through the door 102 that can be locked in place or unlocked using the lock 152.
The device 10 can be provided as a freestanding device or can be attached to another structure. As shown, the device 10 iiieludes legs 154 for supporting the device. An on/off switch 156 can be provided for powering the device 10. Preferably, a spring 160 is provided for biasing the lid or _cover 44 in a closed position as shown in Figure 2.
The detergent use solution genekated according to the invention can be used in conunercial vehicle washing facilities to wash motor vehicles such as automobiles, trucks, sports utility vehicles, and boats. An exemplary cleaning a7rm apparatus used in commercial vehicle washing facilities is shown at reference numeral 200 in Figure 4. The eleaniiig arm apparatus 200 includes a spray arch that is provided so that it extends around a vehicle provided within the interior area 204. A wash cycle generally involvcs:delivery _af the detergent use solution 208 to the vehicle from the front of the vehicle to the: rear of the vehicle or vice versa. The spray arch 202 includes a plurality of spray nozzles 206 that direct detergent use solution 208 onto the exterior of the vehicle during a wash cycle. The detergent use solution 208 is provided to the spray arch 202:.via the delivery line 210 and is provided under pressure. The detergent use solution 208 is prepared by mixing a liquid detergent concentrate 212 and water 214 in a mixing valve 216. The water 214 flows through the water source line 220, into the pump 222, and is forced out of the pump 222 under pressure into the water liri.e 224 and into the mixing valve 216.
The liquid detergent concentrate 212 flows through the liquid detergent concentrate source line 228, through the chemical pump 230, and are forced from the chemical pump 230 under pressure into the liquid detergent line 232. The liquid detergent concentrate 212 can be made available as the liquid detergent concentrate stock solution. It should be understood that the chemical pump 230 could be omitted if the liquid detergent concentrate 212 is aspirated into the high-pressure water line. In addition, it should be understood that the chemical punip 230 can be used to pump the liquid detergent concentrate 212 irito a venturi so that the liquid detergent concentrate 212 then becomes mixed with the high pressure water.
The cleaning arm apparatus 200: may be employed in a conveyor type or a bay automatic type vehicle washing system. In the conveyor setup, often referred to as a tunnel wash, the spray arch 202 is stationary and the vehicle to be washed is moved through the device either by a conveyor or by driving the car therethrough along a predetermined path. In the bay automatic setup, or rollover type apparatus, the spray arch 202 is mounted on wheels for movement along a predetermined path wherein the rollover device is moved forwardly and backwardly over a stationary vehicle to wash the vehicle. In addition, both of the above-described types of vehicle washing devices may be employed in a frictionless or touchless mode wherein high-pressure 'wash and rinse cycles are utilized so that no cleaning components touch the vehicle or in a touching mode wherein the cleaning components touch the vehicle.
The detergent concentrate 212 is'preferably provided containing about 0.5 wt.% to about 25 wt.%. of active components, and more preferably about 1 wt.% to about 20 wt.%. It should be understood that the active components are those components that contribute to 6e cleaning, polishing, and/or drying properties of the composition.. In general, water is not considered an active component.
The detergent concentrate is preferably injected into a water stream or mixed with water in mixing valve 216. Thd mixing valve can be referred to as a mixing bowl or tee and can include a structure. sufficient to generate turbulent flow to enhance mixing. Sources of water include potable water, recycled water, and an aqueous solution. If the water is excessively high in hardness, then the water may be lreated with a water softener before it is mixed with the liquid detergent concentrate.
The active ingredient level applied to the vehicle in the detergent use solution is preferably between about 0.03 wt.% and 1 wt.%o. When the detergent use solution is applied to the vehicle, it is desirable that the level of active ingredient is consistent during the wash cycle across the entire vehicle.
The detergent use solution is preferably applied to vehicles in commercial vehicle washing facilities under ari application pressure of between about 50 psig to about 300 psig. The: chemical;Tump 230 and the water pump 222 may operate at any pressure to achieve the desi'red pressure range. In one embodiment, the water is supplied to;the mixing valve 216 without using a water pump, and merely using the water pressure of the municipality supplied system.
Typical water pressures supplied by*a municipality are from about 15 psi to about 50 psi. Desirably, the water is supplied through a putnp 222 to achieve a detergent use solution application pressure of frorriabout 50 ~si to about 300 psi. In lieu of a chemical pump, the liquid detergent concentrate maybe supplied to the mixing valve 216 using an aspirator.
Now referring to Figure 5, an alternative arrangement of the invention is indicated at reference numeral 300i In this arrangement, several devices for generating a liquid detergent concentrate fronl a solid detergent are arranged in parallel. Water 302 enters the water pump 304 via the line 306, and leaves the water pump 304 as high-pressure water 308',via the high-pressure line 310. The high-pressure water 308 then combines :witli cleaning chemicals to provide a use solution 312 that is conveyed to a spray arch'via the use 'solution line 314.
The apparatus 300 is'shown for generating multiple use solutions, That is, the apparatus 300 can be used to provide multiple cycles for washing a . . y ',::i .
vehicle, or it can be used to provide different'cleaning cycles. For example, it may be desirable to provide a first wash cycle using a first cleaning detergent 320. In this case, the valve 322 is opened allowing the higli-pressure water 308 to combine with the first cleaning detergent 320 in the inixing valve 324. The resulting use solution 326 then flows to the spray arch.. A second cleaning cycle may involve use of a second detergent concentrate 330. In this case, the valve 334 is opened allowing high pressure water 308 to mix with the second cleaning detergent 330 in the mixing .
valve 336 to provide a second use solution 338. Finally, it may be desirable to provide another cleaning cycle utiliziiig a protectant 340. In this case, the valve 342 is opened allowing the high-pressure water 308 to combine with the protectant in the mixing valve 344 to provide the 'use solution 312.
It should be appreciated that the chemicals provided for the apparatus, 300 can be used in combination or individually in a cleaning cycle. In addition, additional eheniieals can be used:to'prcivide additional cycles or to combine with certain other chemicals to provide desired cleaning cycles.
Now referring to Figures 6(a) and 6(b), logic diagrams are provided showing an exemplary car wash cycle for a conveyor setup (Figure 6(a)) and for an in bay automatic set up (Figure 6(b)).
SOLID DETERGEN'f Solid detergents that cati be used according to the invention include those detergents that degrade when cojilacted with water to provide an aqueous detergent composition. An advantage to providing the detergent composition in a solid form is that it is possible to provide a high concentration of cleaning components. Suitable solid detergerit forms include cast or compressed solid blocks, briquettes, powders, granular material, pellets, tablets, flakes, and gels.
The cleaning components of the:detergent composition are genezally referred to as the active ingredient components :("actives" or "active components").
The components of the detergent coinposition that do not significantly effect cleaning properties can be referred to as non-active components. Exemplary active components include alkaline builders, acidic builders, surfactants, corrosion inhibitors, anti-redeposition agents, Chelating agents, sequestrants, dyes, and fragrances. Exemplary non-active components Include water, certain solidifying agents, and certain processing aids: It should be understood that many solidifying agents and processing aids can be considered active components if they contribute to cleaning properties.
The solid detergents that can be used according to the invention include those solid detergents that contain a sufficient amount of active components so that the resulting aqueous detergent can be used to clean the surface of vehicles.
A preferred application of the detergerit is in the cornmercial vehicle washing industry. Accordingly, the types of soil desired to be removed by the detergent composition include those soils normally encountered on the surface of vehicles and normally removed by commercial vehicle washing facilities.
Solidifying agent Solid detergent compositions that can be used according to the invention preferably include a sufficient amount of a component responsible for solidifying the conlposition ("solidifying agent") to provide a solid detergent. In general, it is desirable to use an amount of solidifying agent responsible for solidifying the composition that is sufficient to provide solidification. If too little of the solidifying agent is used, the detergent is generally not sufficiently solid and may be too soft and may not degrade it a relatively constant rate. If too much of the solidifying agent is used, it is expected;that the detergent composition may sacrifice active ingredient cleaning components :at the expense of the solidifying component, and may result in a composition that is':too hard and does not degrade sufficiently well when contacted with water.
One suitable type of solidifying agent includes polyethylene glycol and mixtures of different molecular weight polyethylene glycols. When polyethylene glycol or mixtures of different molecular weight polyethylene glycols are used as solidifying agents, they are ~referably provided in an amount of at least about 5 wt. !o, and are preferably used in an amount equal to or less than about 55 wt.%. More preferably, the amount-of polyethylene glycol or mixture of polyethylene glycols provided in the solid detergent composition is from about wt.% to about 30 wt.%. It shouldbe uriderstood that the discussion of weight percent in the context of the solid :detergent refers to the weight percent of a component based upon the weight of the solid detergent.
; , . : - .
Another suitable solidifyirig agen,t is urea. When urea is used as a solidifying agent, it is preferably provided in ari amount from about 5 wt.%
to about 32 wt.%, and more preferably in an amount of from about 8 wt.% to about 26 wt.%.
The solid detergent may also include a hydrate-type of solidifying agent. In general, it is understood that a hydrate-type solidifying agent generally pulls water away from other components in the detergent composition thereby causing solidification.
When a hydrate is used as a solidifying agent; it is preferably used in an amount from about 6 wt.% to about 60 wt.%, and inore preferably in an amount from about 8 wt.% to about 50 wt.%. In addition, it should be understood that solidifying agents that can be used according to the invention may or may not be considered active components. That is, if the solidifying agent used is one that enhances the detersive nature of the detergent composition, it should be considered an active component.
Another preferred solidifyifig agent is one that forms a hydrate of a metal hydroxide or carbonate. The solidifying agent may provide for controlled dispensing by using solidification agents which having increased aqueous solubility.
For systenls that require less aqueous solubility or a slower rate of dissolution an organic nonionic or amide hardening agent may'be appropriate. For a higher degree of aqueous solubility, an inorganic solidificatiori agent or a more soluble organic agent such as urea can be used.
Furthermore, surfactants may be used to vary the hardness and solubility. Such surfactants include amides such as stearic monoethanolamide, lauric diethanolamide, and stearic diethanolamide. Nonionic surfactants have also been found to impart varying degrees of hardness and solubility when combined with a coupler such as propylene glycol or polyethylene glycol.
Alkaline and Acid Builders The solid detergent composition preferably includes a sufficient amount of alkaline builder andlor acidic builder to provide desired properties.
Preferably, the builders are provided in the soliddetergent composition in an amount from about 1 wt.% to about 80 wt.%o, and more preferably from about 3 wt.% to about 70 wt.%. : . :
The alkalinity builder in the coniposition can be any alkalinity. builder known that is compatible with the other components of the composition being used.
Suitable alkaline sources or mixtures thereof useful in the present invention are those capable of providing the desired pH. Alkalinity sources can comprise, for example, inorganic alkalinity sources, such as-an alkali metal hydroxide, an alkali metal salt, or the like, or mixtures thereof.
Suitable alkali metal hydroxides ~include those generally known that are compatible with the other components of the composition being used. Some examples include sodium or potassium hydroxide, and the like. An alkali metal hydroxide may be added to the composition iri a variety of fornis, including for example in the fonn of solid beads; dissolved in! an aqueous solution, or a combination thereof. Alkali metal :hydroxides:aie commercially available as a solid in the form of prilled solids or beads having a mix of particle sizes ranging fiom about 12-100 U.S. mesh, or as an aqueous solution, as for example, as a 50 wt%
and a 73 wt% solution.
Suitable alkali nZetal salts iriclude those generally known that are compatible with the other components of the composition being used. Some examples of alkali metal salts include alkali metal carbonates, silicates, phosphonates, sulfates, borates, acetates, citrates, tartrates, succinates, edates, and the like, and mixtures thereof. Some examples include potassium and sodium carbonates and bicarbonates. The carbonate salts include, for example, potassium carbonate, potassium carbonate dihydrate, potassium carbonate trihydrate, sodium carbonate, sodium carbonate decahydrate, sodium carbonate heptahydrate, sodium carbonate monohydrate, sodium sesquicarbonate, and the double salts and mixtures thereof. The bicarbonate salts include, for example, potassium bicarbonate and sodium bicarbonate and mixtures thereof. Other: exaniples include the alkali metal ortho or complex phosphates. Examples of alkali metal orthophosphates include trisodium or tripotassium orthophosphate. The complex phosphates are especially effective because of their ability to chelate water:hardness and heavy metal ions.
The complex phosphates include, for example, sodium or potassium pyrophosphate, tripolyphosphate and hexametaphosphates..
Other examples of alkalirie builders include ethanolamines and amines; silicates; and other like alkaline sources. Exemplary acid builders include poly(acrylic acid), butane(tri.carboxylic acid), Thosphonic acid, and mixtures thereof.
Surfactants Surfactants are preferably useddn the solid detergent to provide detersive properties. The solid detergent preferably includes a surfactant or a mixture of surfactants in an amount from about 1 wt.% to about 80 wt.%, and more preferably from about 5 wt.% to about65 wt.%o: Exemplary surfactants that can be used according to the invention include anionic surfactants, nonionic surfactants, amphoteric surfactants, cationic surfactants, arid mixtures thereof.
Anionic surfactants are usually ;defined by the fact that the surface-active segment of the molecule is anionic. Tho anionic surfactant is usually in the form of a salt, but may also be Zwitterioriic or an internal salt. Examples include, but are not limited to sulfonates such as linear alkyl benezene sulfonate and alpha olefin sulfonate, sulfates such as lauryl sulfate and lauryl ether sulfate, natural soaps, and phosphate esters. Further examples include dimmers, trimers, oligomers, polymers (copolymers, graft polymers; block polymers, etc.) having anionic surfactant groups thereon, such as amine groups, phosphate groups, or other polar charge centers with hydrophilic and/or hydropliobic contribution segments. The surfactant normally contains both a hydrophilic and a hydrophobic center or segment in the molecule to be able to be soluble or dispersible in water, yet display oleophilicity (e.g., dispersing and/or dissolving:or attracting power) towards oils, grease, and other non-aqueous, oleophilic materials:
Further specific examples of suitable anionic surfactants are water-soluble salts of the higlier alkyl sulfates, such as 'sodium lauryl sulfate or other suitable alkyl sulfates having 8 to 18 carbon atoms in the alkyl group, water-soluble salts of higher fatly acid monoglyceride rnonosiilfates, such as the sodium salt of the monosulfated monoglyceride of hydrogenated coconut oil fatty acids, alkyl aryl sulfonates such as sodium dodecyl benzene sulfonate, higher alkyl sulfoacetates, higher fatty acid esters of 1,2-dihydroxy propaiie sulfonate, and the substantially saturated higher aliphatic acyl amides of lower..liphatic amino earboxylic acid :17 compounds, such as those having 12-'to -16 carbons in the fatty acid, alkyl or acyl radicals, and the like. Examples of the last mentioned amides are N-lauroyl sarcosinate, and the sodium, potassium,,and ethanolamine salts of N-lauroyl, N-myristoyl, or N-palmitoyl sarcosiriate. Also effective are polycarboxylated ethylene oxide condensates of fatty alcohols.
Exemplary nonionic surfactants include nonylphenoi ethoxylates, alcohol ethoxylates, ethylene oxide/propylene oxide block polymer surfactants, ethoxylated primary alkyl arnines, alkoxylated thiol surfactants, polyoxyethylene-polyoxypropylene condensates, which are sold.by BASF under the trade name "Pluronic", polyoxyethylene condensates-of aliphatic alcohols/ethylene oxide condensates having from 1 to 30 moles of ethylene oxide per mole of coconut alcohol; ethoxylated long chauz alcohols sold by Shell Chemical Co. under the trade name "Neodol", polyoxyethylene aondeiisates of sorbitan fatty acids, alkanolamides, such as the monoalkoanolamides, dialkaiiolamides and the ethoxylated alkanolamides, for example coconut monoethanolamide, laurie isopropanolamide and lauric dietlianolamide; and amiile oxides for example dodecyldimethylaniine oxide.
Zwitterionic or amphoteric surfactants useful with the invention include .beta.-N-alkylaminopropio.nic: acids, n-alkyl-.beta.-iminodipropionic acids, imidazoline carboxylates, n-alky-betaines; amine oxides, sulfobetaines and sultaines.
Cationic surfactants classes include polyoxyethylene tertiary alkylamines or alkenylamines, such as ethoxylated fatty amines, quaternary anunonitun surfactants and polyoxyetliylene alkyletlierarnines. Representative specific exainples of such cationic surfactants include polyoxyethylene (5) cocoamine, polyoxyethylene (15) tallowamine, distearyldimethylamnaoniurn chloride, N-dodecylpyridine chloride and polyoxypropylene (8) ethoxytrimethylariiinoniuin chloride. Many eationic quaternary amnioniuni surfactants of diverse structures are known in the art to be useful in the detergent solutions coriteinplated herein.
Corrosion Inhibitors:..
The solid detergent may also include corrosion inhibitors to provide corrosion resistance. Corrosion inhibitors.can be provided in an amount from about ;}8 0 to about 25 wt.%, and more prefer6bly1n an ainount from about 0.5 wt.% to about 20 wt.%.
Corrosion inhibitors which may be optionally added to the solid detergent include silicates, phosphate, magnesium and/or zinc ions.
Preferably, the metal ions are provided in a water-soluble form. Examples of useful water-soluble forms of magnesium and zinc ions are the water-soluble salts thereof including the chlorides, nitrates and sulfates of the -iespective metals.
Anti-redenosition, Chelating and Seauestering Agents The solid detergent composition may additionally include anti-redeposition agents, chelating agents; and sequestrants wherein these components are provided in an amount from about 0 to about 80 wt.%, and more preferably from about 0.5 wt.% to about 65 wt.%.
Generally, anti-redeposition agents and sequestrants are those molecules capable of complexing or coordinating the metal ions commonly found in service water and thereby preventing .the "metal ions from interfering with the functioning of detersive components within the composition. Any number of sequestrants maybe used in accordance with the invention. Representative anti-r.edeposition agents and sequestrants include salts of amino carboxylic acids, phosphonic acid salts, water-soluble acrylic polymers, among others.
The chelating agent in the composition can be any chelating agent known that is capable of complexing witli the mineraI ions in the solution in the desired manner, and that is compatible with the other components of the composition. Exemplary ehelating:agents include amino carboxylic acid clielating agents such as N-hydroxyethyliminodiaeetie acid, nitrilotriacetic acid (NTA), ethylenediaminetetraacetic acid (EDTA),'N-hydroxyethyJ.ethylenediaminetriacetic acid (HEDTA), and diethylenetrianiiriepentaacetic acid (DTPA).
Processing Aids The solid detergent cari be prepared utilizing a processing aid. In general, a processing aid refers to a component that assists in the formation of the solid detergent. One preferred processing aid that helps in the formation of a solid detergent includes propylene glycol:
i:g , : . .:
~.. ..
Hydrotropes are usefiit to maintain the organic materials, including the surfactant, readily dispersed in an aqueous cleaning solution and allow the user of the compositions to accurately provide the desired amount of the liquid detergent concentrate into the use solution. Example hydrotropes include the sodium, potassium, animonium and alkanol ainmonium salts of xylene, toluene, ethylbenzoate, isopropylbenzene, naphthalene, alkyl naphthalene sulfonates, phosphate esters of alkoxylated alkyl:phenols, phosphate esters of alkoxylated alcohols and sodium, potassium and ammonium salts of the alkyl sarcosinates.
= 20 Other Ingredients Other additives known for use in vehicle cleaning compositions and solutions may be employed. Such other additives may include, but are not limited to additional surfactants, hydrotropes, additional corrosion inhibitors, antimicrobials, fungicides, fragrances, dyes, antistatic agents, UV absorbers, reducing agents, buffering compounds, corrosion inhibitors, viscosity modifying (thickening or thinning) agents, and thelike.
In general, it is desirable to provide the solid detergent composition with as high an active level as possible. That is, by increasing the active level of the detergent composition, it is believed that it is possible to decrease the shipping costs associated with shipping a less concentrated detergent composition.
Preferably, the active level of the solid detergent composition is at least about 50 wt.%.
Preferably, the active concentration of the solid detergent composition is up to about 85 wt.%, and more preferably at least about 95 wt.%. Solid detergents containing an active concentration greater than 95 wt.% are desirable as long as the detergent can be provided in a solid form such as a block or pellet that will degrade at a desired rate when exposed to water.
Further, while the preferred embodiment of the invention will be described in combination with specific electronic control modules for providing control signals, it will be understood that other control circuits, including inechanical, hydraulic, digital, analog, radio frequency, and optical systems, could equally well be configured within the spirit and scope of this invention. It is also to be understood that the terminology used herein is for the purpose of describing particular embod'unents only and is not iritended to be limiting.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the inventiori. : Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed heiein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (10)
1. A method for washing a vehicle, the method comprising steps of:
(a) applying water against a solid detergent provided within a solid detergent reservoir to generate a liquid detergent concentrate, wherein the solid detergent is provided in the form of a block, and the water applied against the solid detergent is provided at a relatively constant temperature within a range of about 40 °F and about 150 °F as a result of heating in a water heater;
(b) collecting the liquid detergent concentrate in a liquid detergent concentrate reservoir, wherein the solid detergent reservoir, the water heater, and the liquid detergent concentrate reservoir are components of a device for generating a liquid detergent concentrate from a solid detergent;
(c) withdrawing liquid detergent concentrate from the liquid detergent concentrate reservoir and combining the liquid detergent concentrate with water to provide a use solution; and (d) washing the vehicle with the use solution.
(a) applying water against a solid detergent provided within a solid detergent reservoir to generate a liquid detergent concentrate, wherein the solid detergent is provided in the form of a block, and the water applied against the solid detergent is provided at a relatively constant temperature within a range of about 40 °F and about 150 °F as a result of heating in a water heater;
(b) collecting the liquid detergent concentrate in a liquid detergent concentrate reservoir, wherein the solid detergent reservoir, the water heater, and the liquid detergent concentrate reservoir are components of a device for generating a liquid detergent concentrate from a solid detergent;
(c) withdrawing liquid detergent concentrate from the liquid detergent concentrate reservoir and combining the liquid detergent concentrate with water to provide a use solution; and (d) washing the vehicle with the use solution.
2. A method according to claim 1, further comprising:
(a) monitoring the amount of liquid detergent concentrate within the liquid detergent concentrate reservoir and providing a first signal and a second signal, the first signal indicating when sufficient liquid detergent concentrate is provided within the liquid detergent concentrate reservoir and the second signal indicating when more liquid detergent concentrate is needed within the liquid detergent concentrate reservoir.
(a) monitoring the amount of liquid detergent concentrate within the liquid detergent concentrate reservoir and providing a first signal and a second signal, the first signal indicating when sufficient liquid detergent concentrate is provided within the liquid detergent concentrate reservoir and the second signal indicating when more liquid detergent concentrate is needed within the liquid detergent concentrate reservoir.
3. A method according to claim 2 further comprising:
(a) controlling the flow of water against the solid detergent provided within the solid detergent reservoir based on the first signal and the second signal.
(a) controlling the flow of water against the solid detergent provided within the solid detergent reservoir based on the first signal and the second signal.
4. A method according to claim 1, wherein the relatively constant temperature comprises a temperature that is allowed to fluctuate within a range of about 10 °F.
5. A method according to claim 1, wherein the water is controlled at a temperature of about 80 °F to about 140 °F.
6. A method according to claim 1, further comprising a step of:
(a) heating the water in a hot water heater prior to the step of applying water against a solid detergent.
(a) heating the water in a hot water heater prior to the step of applying water against a solid detergent.
7. A method according to claim 1, wherein the solid detergent comprises surfactant in an amount of about 1.0 wt. % to about 80 wt. %.
8. A method according to claim 1, wherein the solid detergent comprises surfactant in an amount of about 5 wt. % to about 65 wt. %.
9. A method according to claim 1, wherein the method further comprises a step of:
(a) removing the liquid detergent concentrate from the liquid detergent concentrate reservoir and diluting the liquid detergent concentrate with a water to form a use solution.
(a) removing the liquid detergent concentrate from the liquid detergent concentrate reservoir and diluting the liquid detergent concentrate with a water to form a use solution.
10. A method according to claim 1, wherein the method further comprises a step of:
(a) directing the use solution to a vehicle wash system.
(a) directing the use solution to a vehicle wash system.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US09/829,429 US6645924B2 (en) | 2001-04-09 | 2001-04-09 | Device and method for generating a liquid detergent concentrate from a solid detergent and a method for washing a vehicle |
US09/829,429 | 2001-04-09 | ||
CA002381337A CA2381337C (en) | 2001-04-09 | 2002-04-09 | Device and method for generating a liquid detergent concentrate from a solid detergent and a method for washing a vehicle |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CA002381337A Division CA2381337C (en) | 2001-04-09 | 2002-04-09 | Device and method for generating a liquid detergent concentrate from a solid detergent and a method for washing a vehicle |
Publications (2)
Publication Number | Publication Date |
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CA2636022A1 CA2636022A1 (en) | 2002-10-09 |
CA2636022C true CA2636022C (en) | 2009-10-20 |
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CA002636022A Expired - Lifetime CA2636022C (en) | 2001-04-09 | 2002-04-09 | Device and method for generating a liquid detergent concentrate from a solid detergent and a method for washing a vehicle |
CA002381337A Expired - Lifetime CA2381337C (en) | 2001-04-09 | 2002-04-09 | Device and method for generating a liquid detergent concentrate from a solid detergent and a method for washing a vehicle |
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CA002381337A Expired - Lifetime CA2381337C (en) | 2001-04-09 | 2002-04-09 | Device and method for generating a liquid detergent concentrate from a solid detergent and a method for washing a vehicle |
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CA (2) | CA2636022C (en) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040220817A1 (en) * | 2003-04-29 | 2004-11-04 | Katherine Sanville | Monitoring and controlling processes at a vehicle wash facility |
WO2005072509A1 (en) * | 2004-01-30 | 2005-08-11 | John Fletcher Macmahon | Nutrient delivery device with filter |
US7337791B1 (en) | 2004-04-20 | 2008-03-04 | Belanger, Inc. | Rollover car wash for large vehicles |
US20050244315A1 (en) * | 2004-04-30 | 2005-11-03 | Greaves Michael D | Solid product dissolver and method of use thereof |
US7384902B2 (en) * | 2004-05-14 | 2008-06-10 | Cleaning Systems, Inc. | Metal brightener and surface cleaner |
US7708023B2 (en) * | 2004-10-18 | 2010-05-04 | Ecolab Inc. | Solid product dispenser |
US8063010B2 (en) * | 2004-08-02 | 2011-11-22 | Ecolab Usa Inc. | Solid detergent composition and methods for manufacturing and using |
US20060024492A1 (en) * | 2004-08-02 | 2006-02-02 | Ecolab Inc. | Packaging for solid product release |
US7678754B2 (en) * | 2004-11-01 | 2010-03-16 | Shell Oil Company | System and method for cleaning and/or treating surfaces of objects |
US7659836B2 (en) * | 2005-07-20 | 2010-02-09 | Astrazeneca Ab | Device for communicating with a voice-disabled person |
US7862225B2 (en) * | 2006-07-25 | 2011-01-04 | Stone Soap Company, Inc. | Apparatus and method for mixing a cleaning solution for a vehicle washing system |
WO2008077437A1 (en) * | 2006-12-22 | 2008-07-03 | Ecolab Inc. | Dosing apparatus for dosing a solid detergent composition being conductive in solution |
ES2439958T3 (en) * | 2007-10-18 | 2014-01-27 | Ecolab Inc. | Solid, waxy and compressed cleaning compositions and methods of making them |
NL1035033C2 (en) * | 2008-02-18 | 2009-08-19 | Lely Patent Nv | Cleaning concentrate supply device, and milking device and method therewith. |
AU2009235094B2 (en) * | 2008-04-07 | 2013-09-19 | Ecolab Inc. | Ultra-concentrated solid degreaser composition |
DE102008039411A1 (en) * | 2008-08-12 | 2010-02-18 | Alfred Kärcher Gmbh & Co. Kg | Care products, in particular for hot water high pressure cleaners |
US9421566B2 (en) * | 2009-12-04 | 2016-08-23 | Hydra-Flex, Inc. | Chemical delivery data acquisition system |
PL2582871T3 (en) | 2010-06-18 | 2016-01-29 | Ecolab Usa Inc | Dosing apparatus and method for dosing a composition |
US9022642B2 (en) | 2011-04-28 | 2015-05-05 | Hubert Ray Broome | Dissolution generator, method of dissolving powder, and mixing system |
CN113637535A (en) | 2013-11-11 | 2021-11-12 | 艺康美国股份有限公司 | Multipurpose enzymatic detergents and methods for stabilizing use solutions |
EP2982429A1 (en) | 2014-08-06 | 2016-02-10 | Graff Pehrson Vesterager GmbH | System and method for dissolving detergent tablets or granulate |
DE102015109017A1 (en) | 2015-06-08 | 2016-12-08 | Budich International Gmbh | Detergents for cleaning commercial cooking appliances |
DE102015109019A1 (en) * | 2015-06-08 | 2016-12-08 | Budich International Gmbh | Cleaning device for commercial cooking appliances |
CN105688695A (en) * | 2016-02-24 | 2016-06-22 | 金昌大顺和电气仪表维修有限责任公司 | Powder feeding and dissolving method and tank |
US10221376B2 (en) * | 2016-04-18 | 2019-03-05 | Ecolab Usa Inc. | Solidification process using low levels of coupler/hydrotrope |
US11058999B1 (en) | 2017-07-10 | 2021-07-13 | Hubert R. Broome | Rapid dissolution generator system and method for producing same |
US11718815B2 (en) * | 2018-09-26 | 2023-08-08 | Firmenich Sa | Powder detergent composition |
US20240017298A1 (en) * | 2022-07-15 | 2024-01-18 | Ecolab Usa Inc. | Methods and systems for detecting and controlling the dosage and residual concentration of hard surface cleaners and rinse aids in an automotive parts washer |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US32818A (en) * | 1861-07-16 | Improvement in iron tses for cotton-bales | ||
US32763A (en) * | 1861-07-09 | Machine fob | ||
US3816351A (en) * | 1971-12-10 | 1974-06-11 | Colgate Palmolive Co | Industrial car wash composition |
US4020865A (en) * | 1975-10-03 | 1977-05-03 | Economics Laboratory, Inc. | Remote powder detergent dispenser |
USRE32818E (en) | 1978-02-07 | 1989-01-03 | Ecolab Inc. | Cast detergent-containing article and method of using |
US4569781A (en) | 1978-02-07 | 1986-02-11 | Economics Laboratory, Inc. | Cast detergent-containing article and method of using |
USRE32763E (en) | 1978-02-07 | 1988-10-11 | Ecolab Inc. | Cast detergent-containing article and method of making and using |
US4680134A (en) | 1984-10-18 | 1987-07-14 | Ecolab Inc. | Method for forming solid detergent compositions |
US4595520A (en) | 1984-10-18 | 1986-06-17 | Economics Laboratory, Inc. | Method for forming solid detergent compositions |
US5137694A (en) | 1985-05-08 | 1992-08-11 | Ecolab Inc. | Industrial solid detergent dispenser and cleaning system |
US4690305A (en) | 1985-11-06 | 1987-09-01 | Ecolab Inc. | Solid block chemical dispenser for cleaning systems |
US4687121A (en) * | 1986-01-09 | 1987-08-18 | Ecolab Inc. | Solid block chemical dispenser for cleaning systems |
US4725376A (en) | 1986-04-23 | 1988-02-16 | Ecolab Inc. | Method of making solid cast alkaline detergent composition |
US4826661A (en) | 1986-05-01 | 1989-05-02 | Ecolab, Inc. | Solid block chemical dispenser for cleaning systems |
US4718447A (en) * | 1987-04-24 | 1988-01-12 | Marshall Ralph E | Apparatus for dissolving a solid |
US4964184A (en) | 1987-08-19 | 1990-10-23 | Doris Lewis | Fitted top and bottom bedsheet combination |
US4846989A (en) | 1988-02-12 | 1989-07-11 | Ecolab Inc. | Solid cast warewashing composition and process for preparing the same |
US5194230A (en) | 1991-12-02 | 1993-03-16 | Ecolab Inc. | Solid product static brake for solid block chemical dispensers |
US5397506A (en) | 1993-08-20 | 1995-03-14 | Ecolab Inc. | Solid cleaner |
US5505915A (en) | 1993-10-05 | 1996-04-09 | Ecolab Inc. | Solid chemical dispenser with movable nozzle |
US5389344A (en) | 1993-10-05 | 1995-02-14 | Ecolab Inc. | Variable concentration, solid chemical dispenser |
US5439020A (en) * | 1994-05-27 | 1995-08-08 | Lockhart; Barton | Detergent mixing apparatus and method |
US5782109A (en) | 1996-05-06 | 1998-07-21 | Ecolab Inc. | Dispenser |
US5975352A (en) | 1997-08-28 | 1999-11-02 | Ecolab Inc. | Dispenser |
US6017864A (en) | 1997-12-30 | 2000-01-25 | Ecolab Inc. | Alkaline solid block composition |
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2001
- 2001-04-09 US US09/829,429 patent/US6645924B2/en not_active Expired - Lifetime
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- 2002-04-09 CA CA002636022A patent/CA2636022C/en not_active Expired - Lifetime
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2003
- 2003-11-10 US US10/705,797 patent/US6924257B2/en not_active Expired - Lifetime
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US20040101455A1 (en) | 2004-05-27 |
CA2636022A1 (en) | 2002-10-09 |
CA2381337A1 (en) | 2002-10-09 |
US20020147124A1 (en) | 2002-10-10 |
US6645924B2 (en) | 2003-11-11 |
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