CA2128805A1 - Decolorization of waste paper with selected amines - Google Patents
Decolorization of waste paper with selected aminesInfo
- Publication number
- CA2128805A1 CA2128805A1 CA 2128805 CA2128805A CA2128805A1 CA 2128805 A1 CA2128805 A1 CA 2128805A1 CA 2128805 CA2128805 CA 2128805 CA 2128805 A CA2128805 A CA 2128805A CA 2128805 A1 CA2128805 A1 CA 2128805A1
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- formula
- group
- compound
- tho
- 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.)
- Abandoned
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
- D21C5/022—Chemicals therefor
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Abstract
ABSTRACT
A method for bleaching pulp containing pulp from colored waste paper, wherein the method comprises bleaching the pulp with a bleaching chemical, especially sodium hydrosulfite, in the presence of a selected ethoxylated amine.
A method for bleaching pulp containing pulp from colored waste paper, wherein the method comprises bleaching the pulp with a bleaching chemical, especially sodium hydrosulfite, in the presence of a selected ethoxylated amine.
Description
$ ~ f~ r~
DV-1279 ;~
~ ,,~ ,,,; ,",,,;,.",,,,",.
~HA~C~D D~COLORl~ATIO~ 0~ N~BTB P~ ~ ~ CANADA
~IT~ a~c~D AMIN~ u~ 26 1994 lto B~CKGROUND OF THE INVENTION
Thi3 invent~on concerns enhaneed color rs~o~al ~rom .
... : ..:;. " . ~;
eolor~d waste paper, rOr ~xanpl~, post-eon~u~er colored papQr being r~cycl~d or eolor~d brok~ belng rocycl~d rro~
a papermaking ~ehlne. Th~ ~thod o~ th~ $nvention d~cribe~ a proee~ ~or bright~ning ~ib~r ~rom colorQd wa~te paper whilQ increa~ing ~iber web or p~per web strength.
In curr~nt ~thod~ of proce~sing colored wa~t~ pap~r ~or u~ in r~cycl~d p~p~r product~ th~ wa~t~ paper ia u~ually bleached prior to ~or~lng th~ new product ~o th~t t~e dQ~ired color and brightnQ~s csn ~ obtained $~ th~ ~ew product. Ther~ ar~ a nu~ber of problQ~ as~ocia~d wi~h the r~ycling o~ ~uch color~d wa~t~ pa ~ r. ~he~e include (1) ~h8 pr~encs Or re~idual color fro~ dye~ u~d to dy~
the pap~r and ~y~ u~d in certa~n types o~ printlng, and (2) 108~ of stE~ngth of th~ ~ib~r during proce~ing.
Typically, at~e~pt~ at $ncr~in~ th~ brightnes~ hav~
included th~ uBe o~ ~ultiple~stage bleaching with hydrog~n - 2~ 2~ci ~:
DV~1279 peroxide or chlorine-containing oxidative bleaches which adv~rsely a~fect the pulp ~trength. In addition, the chlorine containing bleaches may con~ribute to t~e ~ormation of chlorinated organics which are environmentally und~sirable. M~thod~ to rQcov~r thQ 10~9 0~ ~tr~ngth h~ve includQd ~dding ~xp~n~ivo kra~ rib~r or ~onding ~gent~ to th~ pulp~d naterial.
lrhore hav~ b~en a nw~ber of attempt~ at ~orming improv~d pulp8.
U.S. Pktent No. 4,710,267 to ~ y ~t al dl~clo~ dy~
r~o~ ro~ recycl~d ~iber using tertiary or qu~tQrnary a~onium co~pound-. ThQg~ oniu~ compound~ have a c~rbonyloxy portion. Cu~tomary bl~aching ~qent~ ~ay be uqed in con~unction with these a~moniu~ compound~.
Japans~ p~t~n~ ~pplication Nu~b~r 82/2S489 t~ach~
color r-~oval by w~hing thQ pul~ With ~lkyla~ine-propoxyl~toJ-~thoxylatQ~.
U.S. Pat~nt No. 2,003,528 to ~v~n~ ~t al de w ri~
enhanced ~1QaChing of textil~ co~tain~ng azoic dye~ with ~ha U5~ 0~ ~O~1U~ dithioni~a nd a quat~rnary ~m~oniuffl ~alt having not la~ than 10 carbon~.
2 ~ 2 ~
U.S. Patent No. S,013,404 to Christiansen et al ; `
describes ~he alkaline hydrogen peroxid~ bleaching o~
mechanical wood pulp with a quaternary aminQ compound with an hydroxy group such as (3-chloro-2-hydroxypropyltri-methyl)ammonium chlorid~
U.S. Patent No. 3,554,863 to H~rvey ~t al t~ashe~ th~
u~e o~ catlonlc quaternary ~nine co~pound~ a~ dobonding ~gent~ ~or pulp sheets. ThQ U~ of ~uch co~pound~ lowers ;
the ten~lla ~trength o~ tha ~ha~t3. -~
U.S. Pnt~nt No. 3,6S7,439 to Chap~an d~crib~ a thod ~or i~proving co~inution o~ pulp ~h~ot3 fro~
c~llulo~ic ~i~erR in order to make ~ib~rs ~ro~ wh~ch air-laid ab~orbent product~ ~ay bo pr-par~d. Th~ ~0t~0d includes the u~e of a guaternary zwit~rionic ~ur~ac~ant.
U.S. P~tent No. ~,144,122 to ~anual~on ~t da~criba~ th~ UB~ 0~ quat~rn~ry a~oniu~ co~pound~ to ~r~at cQllulo~Q pulp and pap~r to roduc0 int~r-~ibQr bonding and th~r~y obtain a low ~chanical ~tr-ngth ~or thQ ~ib~ra.
U. S. P~t~nt No. 4,4~1,962 to Osborn ~i~c10~9 a proc~ or ~k~ng ab~orbQnt ti~sua pap~r web~ u~ing quatQrnary aEmoniu~ co~pound~ a~ d~onding agent~ to weaken th~ str~ngth o~ th~ int~rfib~r bond~
U.S. PatQn~ No. ~,632,730 to Ulubay ~ al di~clo~s a ~ethod ~or increa~ing ~he ab~orption r~to o~ pap~r using 25 ~elected ethoxylated and/or propoxyla~ed co~pounds. ~ ~;
DV-1279 ;~
~ ,,~ ,,,; ,",,,;,.",,,,",.
~HA~C~D D~COLORl~ATIO~ 0~ N~BTB P~ ~ ~ CANADA
~IT~ a~c~D AMIN~ u~ 26 1994 lto B~CKGROUND OF THE INVENTION
Thi3 invent~on concerns enhaneed color rs~o~al ~rom .
... : ..:;. " . ~;
eolor~d waste paper, rOr ~xanpl~, post-eon~u~er colored papQr being r~cycl~d or eolor~d brok~ belng rocycl~d rro~
a papermaking ~ehlne. Th~ ~thod o~ th~ $nvention d~cribe~ a proee~ ~or bright~ning ~ib~r ~rom colorQd wa~te paper whilQ increa~ing ~iber web or p~per web strength.
In curr~nt ~thod~ of proce~sing colored wa~t~ pap~r ~or u~ in r~cycl~d p~p~r product~ th~ wa~t~ paper ia u~ually bleached prior to ~or~lng th~ new product ~o th~t t~e dQ~ired color and brightnQ~s csn ~ obtained $~ th~ ~ew product. Ther~ ar~ a nu~ber of problQ~ as~ocia~d wi~h the r~ycling o~ ~uch color~d wa~t~ pa ~ r. ~he~e include (1) ~h8 pr~encs Or re~idual color fro~ dye~ u~d to dy~
the pap~r and ~y~ u~d in certa~n types o~ printlng, and (2) 108~ of stE~ngth of th~ ~ib~r during proce~ing.
Typically, at~e~pt~ at $ncr~in~ th~ brightnes~ hav~
included th~ uBe o~ ~ultiple~stage bleaching with hydrog~n - 2~ 2~ci ~:
DV~1279 peroxide or chlorine-containing oxidative bleaches which adv~rsely a~fect the pulp ~trength. In addition, the chlorine containing bleaches may con~ribute to t~e ~ormation of chlorinated organics which are environmentally und~sirable. M~thod~ to rQcov~r thQ 10~9 0~ ~tr~ngth h~ve includQd ~dding ~xp~n~ivo kra~ rib~r or ~onding ~gent~ to th~ pulp~d naterial.
lrhore hav~ b~en a nw~ber of attempt~ at ~orming improv~d pulp8.
U.S. Pktent No. 4,710,267 to ~ y ~t al dl~clo~ dy~
r~o~ ro~ recycl~d ~iber using tertiary or qu~tQrnary a~onium co~pound-. ThQg~ oniu~ compound~ have a c~rbonyloxy portion. Cu~tomary bl~aching ~qent~ ~ay be uqed in con~unction with these a~moniu~ compound~.
Japans~ p~t~n~ ~pplication Nu~b~r 82/2S489 t~ach~
color r-~oval by w~hing thQ pul~ With ~lkyla~ine-propoxyl~toJ-~thoxylatQ~.
U.S. Pat~nt No. 2,003,528 to ~v~n~ ~t al de w ri~
enhanced ~1QaChing of textil~ co~tain~ng azoic dye~ with ~ha U5~ 0~ ~O~1U~ dithioni~a nd a quat~rnary ~m~oniuffl ~alt having not la~ than 10 carbon~.
2 ~ 2 ~
U.S. Patent No. S,013,404 to Christiansen et al ; `
describes ~he alkaline hydrogen peroxid~ bleaching o~
mechanical wood pulp with a quaternary aminQ compound with an hydroxy group such as (3-chloro-2-hydroxypropyltri-methyl)ammonium chlorid~
U.S. Patent No. 3,554,863 to H~rvey ~t al t~ashe~ th~
u~e o~ catlonlc quaternary ~nine co~pound~ a~ dobonding ~gent~ ~or pulp sheets. ThQ U~ of ~uch co~pound~ lowers ;
the ten~lla ~trength o~ tha ~ha~t3. -~
U.S. Pnt~nt No. 3,6S7,439 to Chap~an d~crib~ a thod ~or i~proving co~inution o~ pulp ~h~ot3 fro~
c~llulo~ic ~i~erR in order to make ~ib~rs ~ro~ wh~ch air-laid ab~orbent product~ ~ay bo pr-par~d. Th~ ~0t~0d includes the u~e of a guaternary zwit~rionic ~ur~ac~ant.
U.S. P~tent No. ~,144,122 to ~anual~on ~t da~criba~ th~ UB~ 0~ quat~rn~ry a~oniu~ co~pound~ to ~r~at cQllulo~Q pulp and pap~r to roduc0 int~r-~ibQr bonding and th~r~y obtain a low ~chanical ~tr-ngth ~or thQ ~ib~ra.
U. S. P~t~nt No. 4,4~1,962 to Osborn ~i~c10~9 a proc~ or ~k~ng ab~orbQnt ti~sua pap~r web~ u~ing quatQrnary aEmoniu~ co~pound~ a~ d~onding agent~ to weaken th~ str~ngth o~ th~ int~rfib~r bond~
U.S. PatQn~ No. ~,632,730 to Ulubay ~ al di~clo~s a ~ethod ~or increa~ing ~he ab~orption r~to o~ pap~r using 25 ~elected ethoxylated and/or propoxyla~ed co~pounds. ~ ~;
-3~
r ,. .-': '' .'.
D~-1279 U.S. Patent No. 5,129,987 to Joachi~ides et al diaclo6es a ~ethod of bl~aching mechanical wood pulp with ~odium hydrosul~te in a ra~inor.
Enhancad bleaching o~ toxtile~ containing dyo~ i~
d~cribod in E$kQ~, by E. R. Troutman ~fifth ~dition, Charlo~ Griffin and Co., Ltd., 1975).
Thero ~till remains a neod for a ~ethod of docolorizing colored wa~to paper which will ro~ult in w-ll bl~ac~od pulp and particularly one with ~ignificant incr~a~a in ~iber strength. Thus, it iY an ob~sct o~ th~
present invontion to provide ~uch a ~et~od. It ~ a further ob~ect o~ tho pro~Qnt inv-ntion to pro~id~ a ~ethod ~or rocycling colored wa~to pap~r which r~sult~ in a pulp which can b~ used to for~ accoptablo r~cyclod product~. It i~ yot anoth~r ob~ct o~ tho invention to provide a proco~s ~or x-cycling colorod w~sto p~per which i~ ~ccoptable environ~entally. Th~e and othor ob~oct~ Or ~ in~ntion will b~om~ ~pparont ~ro~ th9 de~cription o~ th~ inv3ntlon~
SUMMARY OF THE INVENTION
.
Th~ pr~snt inv~ntion pro~ide~ A ~tho~ ~or th~
~nhancad bl-aching o~ pulp ~ontaining pulp ~ro~ colored wa~te pap~r. The method ~o~pr~e~ brightening ~iber ~ro~
r ,. .-': '' .'.
D~-1279 U.S. Patent No. 5,129,987 to Joachi~ides et al diaclo6es a ~ethod of bl~aching mechanical wood pulp with ~odium hydrosul~te in a ra~inor.
Enhancad bleaching o~ toxtile~ containing dyo~ i~
d~cribod in E$kQ~, by E. R. Troutman ~fifth ~dition, Charlo~ Griffin and Co., Ltd., 1975).
Thero ~till remains a neod for a ~ethod of docolorizing colored wa~to paper which will ro~ult in w-ll bl~ac~od pulp and particularly one with ~ignificant incr~a~a in ~iber strength. Thus, it iY an ob~sct o~ th~
present invontion to provide ~uch a ~et~od. It ~ a further ob~ect o~ tho pro~Qnt inv-ntion to pro~id~ a ~ethod ~or rocycling colored wa~to pap~r which r~sult~ in a pulp which can b~ used to for~ accoptablo r~cyclod product~. It i~ yot anoth~r ob~ct o~ tho invention to provide a proco~s ~or x-cycling colorod w~sto p~per which i~ ~ccoptable environ~entally. Th~e and othor ob~oct~ Or ~ in~ntion will b~om~ ~pparont ~ro~ th9 de~cription o~ th~ inv3ntlon~
SUMMARY OF THE INVENTION
.
Th~ pr~snt inv~ntion pro~ide~ A ~tho~ ~or th~
~nhancad bl-aching o~ pulp ~ontaining pulp ~ro~ colored wa~te pap~r. The method ~o~pr~e~ brightening ~iber ~ro~
:.~ ... ..
2 ~ 2 ~ ~ O ~
color~d wzlste paper while increasing paper w~ab ~trengt~
The method comprises bl~aching pulp m~de ~rom colored wa~te paper with n bleachlng che~ical ~Qlected ~rom th~ group con~i~ting o~ ~ hydro~ul~it~ ~uch 1l~ zinc or ~odiu~
2 ~ 2 ~ ~ O ~
color~d wzlste paper while increasing paper w~ab ~trengt~
The method comprises bl~aching pulp m~de ~rom colored wa~te paper with n bleachlng che~ical ~Qlected ~rom th~ group con~i~ting o~ ~ hydro~ul~it~ ~uch 1l~ zinc or ~odiu~
5 hydronul~it~ or~oidino ul~ini¢ aci~ ~FAS), and ``
hydrogon peroxide ln the pr~nco o~ an ~tho~ylat~d ~ine o~ For~ula I: :
/(C2H40) R-N
0) ~ ~.
ForJula I ~ ~
': ~``' or a propoxylat~d ~in~ o~ Fornula I~
~ HoO) ~ ~
R--N . i \(SH~) ~ : ' For~ul~ II
~ith r~pect to For~ul~ I and II, R i~ a ~e~b~r o~
~h~ group con~6ting o~ ~raight chain alkyl~ h~ing 8 to 25 22 carbon~, op~ionally having on~ to ~hr~o substitu~nt~
o 5 2~ 28~
~elected from methyl and ethyl (especi~lly ~ethyl). The letters x and y oach stand ~or intQgers such that x and y ~ach mu~t hnv~ a value o~ at least ono, are ~el~ct~d ind~pend~ntly, ~nd tho ~u~ of x + y i~ a nu~bor fro~ two to S 12 inclu~l~o~
Th~ method o~ the pre~Qnt i~v~nt~on co~pri~9 uging on~ or ~or~ compound~ o~ Formul~ ~ or II (~pQcially For~ula I) with a bleaching che~ical solectod ~ro~
hydro~ulfit~, FAS and p~roxide to ~n~anae tho ~l~ac~ing of colored wa~te paper. This ~y b~ don~ by: (1) pr~ixing at l~a~t onQ o~ th~ co~pound- of For~ula I or II with the bluaching agent and adding tha~ m~xture to th~ pulp ~lurry;
(2) addinq at l~a~t ono compound o~ For~ulA I or II to ~h~
pulp ~lurry at ~bout th~ ~a~ ti~ th~ bl~aching agent is ~5 added; or ~3) ~dding at l~ast on~ co~pound o~ ~oF~ula I to tho pulp ~lur~y ~hortly ~a~or~ tho bl~achlng ag~nt i8 add~d.
Th~ bl-3ch olution D~y b~ ~t~biliza~ with ~h~l~t~
BUCh a~ ~hyl~nQ~ia~in~trazc~tic ~cid ~DTA), ~Qthyl~n~tri~inQp~ntaac~tic ~cid (E~PA), or ~odiu~
tripolypho~phat~, ~nd/or alkali ~uch ~8 ~odiu~ hydroxid~, ~od~uc carbonat~, or calciu~ carbonat~ ~ n~d~d, ~. ~ 2 ~ ~ ~ ''3 ~V-1279 DETAILED DESCRIPTION OP THE INVENTION AND
DESCRIPTION OF ~HE PREFERRED ElgBODI~ENTS ~;; . `
.' Tho ~thod o~ the pr~nt inv~nt~on co~pri~ u~ing on~ or ~ore o~ the compound~ o~ Foxmula I or II ~Q~peci~lly aompound~ of For~ul~ I) with hydrol~ulfit~, FAS or p~xoxide for bl~aching color~d wa~tn pap~r wbilo incre~lng th~
~trongth char~ct~rist~c~ of th~ ~ibQr w~b. A p~rticul~r bl3aching chs~ic~ ydro~ulfit~, $uc~ a~ ~odiu~ :
hydro~ulfit~ p~ox~dQ i~ u~d it ~ay ~ in comm~rci~lly ~v~labl~ conc~ntratlons such ~ 50~ or 30%.
Whilo tho gon~r~l ds~initlon~ ~or th- R group~ and th~ : :
valuo~ of x and y have ~n li~tod ~bo~ or For~ulae I ~nd ~-:
II, it is pro~rrod that R b- ~ol~ct~d i~ro~ C~2~ traight 15 c~ain al.~ and that x and y ~r~ ~ach ind~p~nd~ntly ~el~ct~d to b~ a nu~b~r ~ro~ 1 to 5.
Ttl~ co~poun~ o~ For~ul~ I and II ~ay b~ ~dg~ by ~thod~ w~ll known to t~lo~ ~kill~td in ~lQ ar~ or ~o~
purchas~d co~0rc~11y. ~uch lil~thOd8 includ~ hoating ( i~
20 it i~ ~ aolid) ~a nppropr~t~ n~ OE n~tur~
xtur~ u¢h az~ tllllow or coco ~min~ until it b~com~ a litIu~d ~nd ~n ~dding ~od1u~ hyd~oxid~ a~ a 1~Y~1 0~ about 0.1~ bas~ on th~ v~igh~ o t~ a~in~ y1~ oxide or :.
~7~
~1 ~ 2 ~
propylene oxide is then added in an ethoxylation or propoxyl~tion reaction to for~ the desired co~pound of For~ul~ I or II.
In the proce3si~g o~ colorad wa~tQ pap~r th~ papQr i~
repulp~d by adding it to wat~r to Sor~ a ~lurry o~ 3 to 40 p~rcont dry rlbsr (~l~o call~d 3 to ~0 p~rc~nt con~i~t~ncy) in a pulpor. Tho ~ibQr slurry ~y be ~ub~c~od to a deinking proce~ or ~xamplQ, by u~ng w~hing or ~lotation proc~s~e~ w~ll known to tho~Q in th~ art) prior to tr~atmant with th~ compound- o~ thi~ inv~nt~on. Th~
ra~ulting pulp ~ay b~ pr0tr0nt-d with a ~h~l~t~ ~uch ~
ethylenedin~nQtetra~c~tic acid, di~thyl~n~tria~in~-ntaacetic ~cid, oodiu~ tripolypho~p~at~, ~o n~a a ~w, i~ de~ir~d.
It hould ~Q notsd that bo~h brok~ and wa~t~ paper may be repulped wi~h or without tho u~ o~ caustic, d~pen~ing on th~ phy~ical ~nd optical prop~rtl~ r~uir~. The~
~thod~ aro known to tho~ ~killod in ~h~ ~rt.
At on~ or ~or~ poin~s ~n th~ proc~ing Or color~d 20 wa~t~ papQr ~ bl~ac~lng ~t2p i~ u~ed. Conv~ntionally, ~uch ~l~aching i~ don~ with ~he u~ o~ peroxida~ ~uch ~ fro~ 0 2 ~ 2 ~
DV-12~9 - 5% of a 50% solution; hydrosul~ite, such as fro~ o - 3%;
or FAS, such as from O - 2%. Typical valu~ for addition l~v~l~ 0~ theEe bl~aching ag~nts ar~ a~ ~ollow~:
~ ydro~ul~it~ - ~25 - 1.0% ~uch ~ 0.5 - 1.0% or 0.5 - l.S~
~) FAS - ~25 - l~OS
(c) hydrogon peroxida - O.S ~ 3S
~n convontional t~chnigu~, a bl~ching ~olution i~
add~d ~o 2 pulp 81Urry ~t ~ pU~p or oth~r point wh~r~
~ti~actory ~ixing can ba achi~v~d (with ~ini~u~ air contact $~ hy~ro~ul~it~ or FAS 1~ u~). Th~ pulp ~ixtur~
i~ thon hQld ~or at loa~t on~ hour ~n ~ tow~r or ch~t wh-rQ ~lnimu~ air contact 1~ allow~d ~i~ hydrosul2ito or FAS i~ u~d). ~h~ blo~ching r~action t~ko~ plac~ during t~i~ ti~
~hQ bl~aching proc~ can bæ r~p~atQd, but u~u~lly uch bl-~ch~ng lg not don~ ~or~ th~n two ti~
Tho pr~nt invontion provi~ a ~t~od for onh~n~ing the tparticularly with 30diu~ hydrosul~it~ ~ th~ bl~c~ing ~g~nt~ bl~ lnq o~ color~d ~rok~ or wa~ p~p~r wlth aubstanti~lly incra~ing ~h~ ~treng~ o~ t~ r~ul~ing ~lb~r wQb.
Tho a ~ou pulp slurry 1~ h~at~d ~o ~ t~pæra~ur~ o~
~ ro~ a~out 120 dogree~ to ~bout 180 degr~æ F (50 d~gr~s to 82 d~gr~ C). T~ pH o~ thR ~lurry i~ ~d~u~tQd o th~t _g~
~: .
2 1 2 ~
it i~ in the rang~ of 3.5 to 11Ø This pH adjustment ~ay be accomplished by using NaOH or Na2CO~ as the bas~ and ~2So~
a~ the ~cid. The addition of at l~a3t one co~pound of Fox~ul~ I or II aay be done at Any tl~ in ~ho mill ~y~tem prior to or in con~unction wi~h th9 addition of tho bl~nching agent. For xampl-, t~o addition of th~ ~dditive may be ~cco~pll~h~d by ono Or th~ ~ollowing ~thod~:
~a) An ~in- co~pound o~ For~ul~ I or II i~ add~d to the blQ~ch ~olution -(1) The a~in~ co~pound 1~ dis~olv~d in wat~r.
~2) The pH i8 ad~u~sd to 10 wi~h NaO~ or Na2CO3. ~ .
~3) Solid sodium hydro~ulXit~, ~olid FAS or a Aolution of E~02 ~ add-d and d~olvod.
~b) An amin~ c~mpound of For~ula I or II i~ blend~d wlth the bleaching agent -~1) At l~a3t one ~in~ co~pound i~ ~ixed wi~h tho soloct~d blo~hing ~g~nt. ;~
~2) Th~ bl~ndqd ~ixturo i~ th~n ~ddsd to ~h~
pulp slurry whlch ha~ ba~n pr~par~d a~ ~ :
~scr~b~d abov~
(c) An a~in~ Go~pound of For~ula I or II i~ a~ded at th~ ~a~Q ~ tho bl~aching ngent i~ add~d - :
(1) At l~At on~ a~in~ co~pound ~ Add~d to th~
pulp d urry vhich ha~ be~n pr~par~d described abov~O
2 ~
~-12~9 (2) The addition of the a~ine co~pound i~ done at ~bout the same ti~e the bleac~ing agent i~ add~d to the pulp slurry.
Th~ ~ount of amine co~pound addQd i~ ~ro~ ~bout 5 p~und- ~2.3 kilogram~) ~0.25 perc~nt addition l-val) to ~bout 20 pound3 ~9.1 kilogram~) ~1.0 p-rc~nt addition 18~el) p~r ton Or dry ~iber contont with:
~a) 5 - 50 pound~ ~2.3 -22.7 ~g) of hydrosul~it~;
~b~ 3 - 15 pound~ 6.8 kg) of FA3;
~c) 30 - 100 pound~ (18.1 - ~5.5 kg) o~ hydr~g~n peroxid~ ~50%) ~olution. (Not~ t~at ~ho~ ~kill~d in th~
art ~ay u~o dif~r~nt conc~ntration~ o~ H~O~ ~olutlon whila maintalning thi~ ratio.) Aft~r tho ~ ching ag~nt and a~in~ co~poun~ havo b~n add~d to th~ pulp lurry, th- pulp 1~ ~ixæd, pro~r~bly int~n~oly, and pr~rably und~r ~ n~rogen at~o~ph~r~ ~f ~ydrosul~it~ or FAS ~av~ ~Qn u~d, w~ ~alntain~ng the to~p~ratur~ botw~n 80 degr~ F (25 d~gr~a~ ~) and 212 dogr~ (100 d~gro~s C). I~ good ~ixing h~ b~n achi~v~d, th~ ~i~o n~od~d ~or bl~ch$ng i3 u~ually ln th~
~.
rang~ o~ ~ron ~bout on~-h~l~ hour to ~bout o~ and on~-hal~
~our~. Long~r p~rioda Or ~ ay bQ u~d i~ d~r~d or i~
conveni~nt.
Aft~r the bleaching step has been completed, th~ pulp iB cooled, ~or example, by dilution wi~h mill process or wh~tawat~r. The p~ is then ~d~usted according ~o the roquir00~nt~ o~ th~ part$cular papar n~chin~ or th~ paper product~ b-ing ~nd~. For ex~pl~, Auch pH'~ ~y bOE ln th-r~ng~ o~ ~rou about 3.5 to ~bout 11 and ~fact~d by u~ing ~ .
~ b~De ~uch a~ 30dium hydroxide or ~odium carbonats or ~n acid ~uch a~ ~ul~urlc acid. Tha ~lection of p~ i~ not part of thi~ lnvQntion. Tho~e sk~ d ln th~ ~rt will ~l~o recogniz- that the ~thod of t~is lnv0ntion ~ay al~o be u~-d with pulp~ ~hich ar~ ~ad~ wi~h partial ~mount~ of :~
colored wa~to p~p~r. `
. .~ ~'''' In ord-r to valuate t~ oct o~ thi~ hod on pulp two ~valu~tion~ ~2y bo p-r~or~d.
. ~.
Th~ rir~t ~Yaluation 1~ a ~rlg~tn~ a~ ent. Thi~ :
2 0 ~e~e~nt i~ ~on~ by ~aking pad~ u~in~ Technical A~oclat~on of th~ P~p~r ~nd Pulp Indu~try (TAPPI) S~andard M~thod T218 o~-91, incorpora~d ~y r~f~r~nc~ h~r~in in i~
~ntlroty. ~h- briqhtn~ valuation i~ th~n donQ in accord~nc~ w~th TAPPI Stan~rd ~thod TS25 o~-86, ~ncorporat~d by r~forencQ her~in in i~ ~ntir~ty.
3 $
Gen~rally ~ethod T218 om-91 describe~ t~e formation of handsheet~ for mea~uring the reflectance of pulp and ~ethod T525 om-86 doscribo3 how to mea~ur~ the di~fu~ brightne~s o~ PUlR~
Th~ ~igni~icanco of th~ briqhtnoas d~ta ahowh in Table~ I and II b-low i~ that any ~alu~ at l~st on~ point aboYe the C3.5 value for a ~amplo blo~ched with hydro~ulrite ~lOnQ i3 a ~lgni~icant i~provs~nt. Th~ NISO
Brightne~ 18 a ~ethod Or moa~uring brightne~ dev~lop~d by the Internat~onal Org~nlzation ~or S~andardization and i~ wQll known to thos~in the ~rt.
, ' ` ' ' Th~ second ovaluation i~ an a~es~Qnt of ~h~ str~ngth o~ hand~h~t~ m~de with pulp bl-~c~ed u~ing th~ procQ3~ of thi~ invontion. Hand~haot~ w~r~ m~de usinq TAPPI Stnndard Method T20S o~-88, incorporat~d by re~r~nca h~r~in in it~
ontir-ty. ~e ~ontrol 1B a hand~h~ot ~ade by t~o ~ane ~APPI a~th~d, xc~pt tha~ th~ pulp u8ed ~or th~ control hand~h~et i~ ~a~Q ~ro~ pulp bla~ch~d wi~h ~ydro~ul~ite alone and no ~thoxylated a~ne ~dditi~e. Blank~ ~re ~ade .
uging th8 ~a~ TAPPI ~thod, ex~p~ ~hat th~ ~and~he~t~ arQ
~ada ~ro~ pulp which h~ not ~-n ~reated with either or ;~
both o~ hy~ro~ul~it~ or ad~ v~. Th~ ~tr~ngth o~ the - 25 h~nd~he~ts ~ evaluat~d u~ing T~PPI Standard ~ethod ~9 . ' ~x~
2~8~
om-88, incorporated by reference herein in it~ entirety.
Thi~ T494 ~ethGd 1~ used to evaluate the tensile brea~inq prop-rti~ Or pap~r ~nd paporbo~rd u~ing ~pparatus ~or ~easuring the con~tant rate o~ ~longation.
Th~ signiric~nce o~ ~trOEngth in T~blo I wn~ deter~ined by null-hypothe~i~ t~ting ~t thæ 95~ con~idence level using tho SigoaStat ~oPtw~ro packag~ ~and011 Scienti~ic Company) which ~how~d that ~xa~plQ S w~ ~ignific~ntly high~r in t~n~ trangth t~n Exaæplo~ 1 through ~
: . .
~EXAP~I~S
ThQ Pollowing Ex~plo~ nr- illu~trativ~ o~ t~
in~ention but ~hould not bo lnterprot~d A~ li~itation~
ther-on. Unlo~ oth0rw$~0 indicatGd, all p~rcen~s ar~
weig~t p~rcent~ ~nd ~y~bol~ hn~e ~h~ir u~u~l ~nd custoEary meaning~: C i8 degr~ Centigrado, ~1 i3 ~illilitQr, kg i~
kilogra~, g ~ gra~, 1~ i~ pound, DT~A is d~thyl~n~-tr~ ~ in~p~nt~cstic acid p~nta~odiu~ ~al~. ~h~ical 20 l~ laVQ t~ir u~u~l ~n~ cuglto~ry ~anipg~
colorsd p~p~r r~ranced ln ~h~ x~pl~ ~as obtaln~d ~ro~ a lo~al o~ic~ product~ supply ~tor~ in Ch~rlott~, North Carolina ~nd w~ ~ rando~ ~loction.
2128~0 3 ~ he strength data was obtained by first for~ing handsh~ets ~ro~ the bleached pulp aacording to the TAPPI
Standard Mothod T205 o~-88 and n~suring tho ~trongth of sh~ot~ ~or~d according to the pxoc~dure descr~bed in TAPPI
S Stnndard Mothod T~94 o~-88.
All pulp~ ~d- in th~ followi~g ~xampl~ wer~ stored ~t 34 d~gre~ F ~1 doyr-~ C) until u-ed.
(Unbl~ached Pulp) A ~tocX o~ color~d l~dgQr was~ pap~r pulp was ~ad~ by the ~ollowing m~thod. To 5 1~. (2.27 kg) o~ color~d brok~
wna addad 20.7 lit~r~ of wator at 65 F (25 C) in a ~aboratory Pulp~r (Adiron~ack Machin~ Co~pany, Glynn~
Fall~, N~w York). R~pulping w~ 6~ri~d out ov~r ~ p~riod o~ 15 ~inut-~. T~ r~ulting pulp slurry (cont~ining lo p rc~nt ~olld~) wa~ u~d a~ tho ~upply o~ pulp for th~
~ollowing ~x~pl~
For ~ Exa~ple~ in wh~h ~ ching wa~ don~ with hydrog~n p~roxid~, th~ pulp ~ampl~ ~n~ ~w~kerQd to a con~tency o~ i2 ~rc~n~ (12 percent ~olid~) on a ~uchn~r funn~l ~itt~d with a #~ What~an filter paper.
. . ' '~, ~5~
2 ~. 2 8 8 ~ 3 DV-1279 For the ~xamples below, further dilution with d~ioniz~d water was done as noted. For example, Example~
$n which bl~ching was dono with hydrosul~ite, a ~ampl~ of pulp v~ diluted to ~ perc~nt consi~tency ~4 p~rcent ~olid~) with d~ion~zed watQr.
. :'"'' .~ , EXAMPLE 2 ::
(Parox~de ~le~ching) Fiv~ pla~tic bag~ wQr~ ~ach ~lled with 100 gra~ of pulp pr~par~d according to ~x~upl~ 1 and ha~ing 12 psrc-nt con~t~ncy. ~h~ b~g~ wer~ clo~d ànd pl~csd in a wat~r bat~ whlch wa~ brought up to a te~p~raturo o~ 140 degr~
F (60 dsgr0a~ C). Th~ bag~ o~ pulp ~rQ thon e~pti~d into th~ bowl (1 gallon or 3.8 liter c~pacity) ot a Nob~rt PlanQtary Ac~ion Nix~r. Whil~ ~ixlng th~ pulp, a bl~ch ~.
sQlution wa~ a~d~d lowly by ~yring~. Thi~ bl~ ch ~olu~ion W~4 ~ad~ by 2iYing:
~ a) 20 ~.l o~ ~ 10 p~re~nt (v~ight/w~1gh~) ~qu80u~ H~02 ~olut~on (-quivalon~ ~o 2 p~rc~nt H~02 on a ~ry pulp ba~
~ ) 20 ~1 o~ a 7.5 parc~nt (w~ight/~ight) ~qu~ou~
NaOH 801ution (aquiYal~nt to 105 p~rc~nt NaOH on ~ dry pulp basl~); and :~
1 2 ~ `,q DV-1279 :
(c) 20 ~1 of ~ 0.2 percent (weight/w~ight) aqu~ous :
solution o~ DTPA (equival~nt to 0.04 percent DTPA on a ~y pulp ba~io).
A~ter ~lxing tha pulp with th- bl~ach ~olution, ths .
pulp was dividod into ~ive ~qual part~ ~nd raturn~d to the plastic baga. The bag~ w~re hsld at ~he 60 dsgrQ~ C . ` `~.
temp~ratur~ ~or 90 ~inutos in a wat~r ~ath. E~ch bag o~
. .
pulp w~s rQ~ov~d ~ro~ tho b~th and placQd tn ito own be~kQr. Th~n, 10 ~1 o~ oul~urous acid ~6 p~r~ent S2 in d~ioniz~d wator) was ~dd~d with ~lxlng to ~ pulp to noutralizo tho r~sidual .p~roxid~. ~hQ bl~ach~d pulp wao thon dllut~d to 4 percent consiotoncy with d~ionizod water.
~ ropresontativ~ ~a~pl~ wao r~o~od and ~ brightn~o~ pad wao ~or~od ~ccording to tho TAPPI Standard ~othod T218 o~
. -91 re~renc~d ~bov~. Th~ brightn-s~ data i~ found in Table I. T~i- d~t~ i~ th- ~v~rag~ o~ ~oa~urQ~nt~ ta~n on two pad~
EXAMPL~ 3 20(Sodiu~ Hydro~ul~it~ U ~aching) : ~ . ~..;
S~plo~ o~ pulp (375 gra~ ~a~p~e~ o~ 4 p~rc~nt consi~toncy) pr~par~d and ~torQd according to th~ ~8~hod 0~
Xx~pla 1 w~r~ pl~c~ in two 500 ~1 wi~a ~ou~h poly~thyl~ne bottl~s (375 g~bottl~3. Th~ bottl~g w~r~ ~e~t~d ~o 150 ; ~
, ~.
2 ~2~ DV-127s degrses F (65 5 degreec C) u~ing a water bath ~h~ bottl~s were then tran~ferr2d to a deaeration station equipped with ~ ~ ;
a ~acuu~ gauge and a lino (equipp~d with a Fire~ton~ valva) attach~d to a vacuu~ ~pparatus (wat~r a~pirator~ and a nitrogen ~upply The pulp wa~ d-~Q~at~d by alternativQly ~ub~acting tho bottl- to a vacuu~ cr-ated by ~ water aDpirator and then ~lu~hing th- bo~tle wlth nitrog~n Thi~
was done three tiDe~ ~ach bottl- wa~ th~n mov~d to a mixing station con~i~ting o~ a rubber ~topper p~rman~ntly attach~d to a ring ~t~nd through ~hich ~a~ ~ounted an ovQrh~ad variablo spsed ~ixor, a p~ probo, and ~ nltrog~n line Tho rubb4r ~topp4r al80 contained an op~ning through which bloach was ad~ed via ~yr~nge Mixing was ~tart~d and tho pN wa~ ad~u~tod to 7 0 u-ing O lN NaON or O lN H~SO~ a~
roquir-d Sodius ~ydro-ul~it~ ~10 ~1 o~ ~ 1 5 p4rcent solution) (woight/weight, ~odiu~ hydro~ul~it~ ioniz~d water) wa~ then addod ~y ~yring~. S~irring w~ continu~d for 3 ~inut~-, n~t~r w~ich ~ch bottl~ wa~ r~app~d ~nd roturn~d to th~ ~at~r bath (150 d~gr~e~ F, 65 5 d~gr2~ C) ~or on~ hour Th~ pulp wa~ ~h~n r~æo~od ~ro~ th~ w~t~r ba~h and a r~pr~n~ativ~ YaDpl~ ( 3 g d~y weigh~) w~ -removed and u~d eo ~ro~ ~ brightn~ pad acco~ding to TAPP~ St~ndard ~thod T218 o~-91 r~or~nc~d abov~ Th~
~rightne~ dat~ ~ 8 found in ~abl~ I
-18- ~
...
fv~
(PoroxidR/Hydrosulfite Two Stage ileaching) An Qntiro ~amplo Or pulp pr~par~d according to the ` :
~thod o~ 2xa~pl~ 2 ~xc-pt for ~aking tho pad) was dilutsd to 4 p-roont con~i~t~ncy. Two ~ottl-~ w6ro then ~ach ~ d wit~ 375 gra~ Or ~lurry and troat~d u~ing th~
m~thod o~ ~x~pl~ 3. A brightn~s pad ~s ~ads ~ccording to TAPPI Standard MQt~Od T218 o~-91. m- brightnæs~ data 10 i8 li~t~d in Tabl~
~XA~PL~ 5 :
tHydrosul~it~ and ~tho~yl~ed Amin~ Co~pound, Pr0bl~nd~d) Two s~spl~ ~375 gra~ ~ach~ o~ ~hQ ~ pQrCent pulp ;~
slurry pr~pnr~d accordinq to t~ ~QthCd 0~ ~xa~pl~ 1 w~r~
plnced ~nto ~ch o~ two bottlQa. Th~ pulp w~ th~n troatod ~ccording to t~ hod o~ Exa~ 3, xc~pt th~ t~ lO ~l o~ 1.5 p~rc~nt w~ight/w~ight hydro~ul~ bl~ach ~olution ; :
wa~ pr~ixod ~ith 10 ~l o~ 0.75 p~rc~n~ ~y ~igh~ of tallow ~ln~ ~tho~yl~d wi~h 5 ~ol~ o~ ~thyl~nQ oxid~
b~for~ a~ltion to th~ pulp. A brightn~s ~ad ~a~ ~de according to ~APPI ~tandard ~hod T218 o~-91. Th~
brigh~n~ ata i~ t~ in Tabl~ Io :~
~?
~; 621 '~
DY-1279 :
(Nydrosulfite and Ethoxylated A~in~
~thoxylat~d A~lne Add-d First) Th~ ~thod do~cribad in ~x~mpl- S wa~ r~p~nt~d oxcept that 10 ~1 oS a 0.75 porc~nt by weight ~olution of a tallow ~in~ sthoxylat~d with 5 ~01~8 Or ~thyl~n~ oxi~e was added ~u~t prior to th~ ~dition o~ th~ 10 ~1 o~ 1.5 pQrcent waight/w~ight hydrosul~ita ~olution.
~XA~PL~ 7 Th~ ~othod oS ~x~pl~ 6 w~ rop~at~d ~xc~pt that cocoa~in~ ~thoxylatod with 5 ~ol~s oS thylan- oxide r~placed ~he a~inQ u~d in Exa~ple 6 ;"~
~XA~PLE 8 ,~ ~
Th~ ~tho~ o~ ~x~plo 6 W~8 rQp~t~d ~xcept that a tallow ~Ein~ 0thoxylat~d with 20 ~ol~ o~ ~hyl~n~ oxid r~placsd th~ ~ina u~d ~n Exa~pl~ 6~
, ` , ~` " ' ~ '' ' -20- ~:
. ', ~.
2 ~ 2 8 TABLE I ~ ; .
DESCRIPTION OF TR}3Aq~T ~;
Ex~pl~ . ISO ~r~aking NuD~r . E~rightn~ ~ngt~
(p ~rcemt) (~Q~r~) _ . , __ . . _ ., 1 Unbl-~ch~d pulp36 . O 4252_ 2 . E~roxida blo~ch~d pulE~ 44 . 0 4388 3 Sodiu~ hydro~ul~to63.5 4672 :
blalach~d pulp ~
_ 4 Peroxid~ Xollowad by72 . O 4375 hydro3ul f lts ~l~achsd P _ ~. . . . - .
}~ydrosulfit- problend-d 68.2 5537 . with a~in~ -6 Hydro~ul~it~ ~nd a~in~ 68 . 2 ~ ~:
. ~dd~d a~ a~e t~e . . _ . ~ :
hydrogon peroxide ln the pr~nco o~ an ~tho~ylat~d ~ine o~ For~ula I: :
/(C2H40) R-N
0) ~ ~.
ForJula I ~ ~
': ~``' or a propoxylat~d ~in~ o~ Fornula I~
~ HoO) ~ ~
R--N . i \(SH~) ~ : ' For~ul~ II
~ith r~pect to For~ul~ I and II, R i~ a ~e~b~r o~
~h~ group con~6ting o~ ~raight chain alkyl~ h~ing 8 to 25 22 carbon~, op~ionally having on~ to ~hr~o substitu~nt~
o 5 2~ 28~
~elected from methyl and ethyl (especi~lly ~ethyl). The letters x and y oach stand ~or intQgers such that x and y ~ach mu~t hnv~ a value o~ at least ono, are ~el~ct~d ind~pend~ntly, ~nd tho ~u~ of x + y i~ a nu~bor fro~ two to S 12 inclu~l~o~
Th~ method o~ the pre~Qnt i~v~nt~on co~pri~9 uging on~ or ~or~ compound~ o~ Formul~ ~ or II (~pQcially For~ula I) with a bleaching che~ical solectod ~ro~
hydro~ulfit~, FAS and p~roxide to ~n~anae tho ~l~ac~ing of colored wa~te paper. This ~y b~ don~ by: (1) pr~ixing at l~a~t onQ o~ th~ co~pound- of For~ula I or II with the bluaching agent and adding tha~ m~xture to th~ pulp ~lurry;
(2) addinq at l~a~t ono compound o~ For~ulA I or II to ~h~
pulp ~lurry at ~bout th~ ~a~ ti~ th~ bl~aching agent is ~5 added; or ~3) ~dding at l~ast on~ co~pound o~ ~oF~ula I to tho pulp ~lur~y ~hortly ~a~or~ tho bl~achlng ag~nt i8 add~d.
Th~ bl-3ch olution D~y b~ ~t~biliza~ with ~h~l~t~
BUCh a~ ~hyl~nQ~ia~in~trazc~tic ~cid ~DTA), ~Qthyl~n~tri~inQp~ntaac~tic ~cid (E~PA), or ~odiu~
tripolypho~phat~, ~nd/or alkali ~uch ~8 ~odiu~ hydroxid~, ~od~uc carbonat~, or calciu~ carbonat~ ~ n~d~d, ~. ~ 2 ~ ~ ~ ''3 ~V-1279 DETAILED DESCRIPTION OP THE INVENTION AND
DESCRIPTION OF ~HE PREFERRED ElgBODI~ENTS ~;; . `
.' Tho ~thod o~ the pr~nt inv~nt~on co~pri~ u~ing on~ or ~ore o~ the compound~ o~ Foxmula I or II ~Q~peci~lly aompound~ of For~ul~ I) with hydrol~ulfit~, FAS or p~xoxide for bl~aching color~d wa~tn pap~r wbilo incre~lng th~
~trongth char~ct~rist~c~ of th~ ~ibQr w~b. A p~rticul~r bl3aching chs~ic~ ydro~ulfit~, $uc~ a~ ~odiu~ :
hydro~ulfit~ p~ox~dQ i~ u~d it ~ay ~ in comm~rci~lly ~v~labl~ conc~ntratlons such ~ 50~ or 30%.
Whilo tho gon~r~l ds~initlon~ ~or th- R group~ and th~ : :
valuo~ of x and y have ~n li~tod ~bo~ or For~ulae I ~nd ~-:
II, it is pro~rrod that R b- ~ol~ct~d i~ro~ C~2~ traight 15 c~ain al.~ and that x and y ~r~ ~ach ind~p~nd~ntly ~el~ct~d to b~ a nu~b~r ~ro~ 1 to 5.
Ttl~ co~poun~ o~ For~ul~ I and II ~ay b~ ~dg~ by ~thod~ w~ll known to t~lo~ ~kill~td in ~lQ ar~ or ~o~
purchas~d co~0rc~11y. ~uch lil~thOd8 includ~ hoating ( i~
20 it i~ ~ aolid) ~a nppropr~t~ n~ OE n~tur~
xtur~ u¢h az~ tllllow or coco ~min~ until it b~com~ a litIu~d ~nd ~n ~dding ~od1u~ hyd~oxid~ a~ a 1~Y~1 0~ about 0.1~ bas~ on th~ v~igh~ o t~ a~in~ y1~ oxide or :.
~7~
~1 ~ 2 ~
propylene oxide is then added in an ethoxylation or propoxyl~tion reaction to for~ the desired co~pound of For~ul~ I or II.
In the proce3si~g o~ colorad wa~tQ pap~r th~ papQr i~
repulp~d by adding it to wat~r to Sor~ a ~lurry o~ 3 to 40 p~rcont dry rlbsr (~l~o call~d 3 to ~0 p~rc~nt con~i~t~ncy) in a pulpor. Tho ~ibQr slurry ~y be ~ub~c~od to a deinking proce~ or ~xamplQ, by u~ng w~hing or ~lotation proc~s~e~ w~ll known to tho~Q in th~ art) prior to tr~atmant with th~ compound- o~ thi~ inv~nt~on. Th~
ra~ulting pulp ~ay b~ pr0tr0nt-d with a ~h~l~t~ ~uch ~
ethylenedin~nQtetra~c~tic acid, di~thyl~n~tria~in~-ntaacetic ~cid, oodiu~ tripolypho~p~at~, ~o n~a a ~w, i~ de~ir~d.
It hould ~Q notsd that bo~h brok~ and wa~t~ paper may be repulped wi~h or without tho u~ o~ caustic, d~pen~ing on th~ phy~ical ~nd optical prop~rtl~ r~uir~. The~
~thod~ aro known to tho~ ~killod in ~h~ ~rt.
At on~ or ~or~ poin~s ~n th~ proc~ing Or color~d 20 wa~t~ papQr ~ bl~ac~lng ~t2p i~ u~ed. Conv~ntionally, ~uch ~l~aching i~ don~ with ~he u~ o~ peroxida~ ~uch ~ fro~ 0 2 ~ 2 ~
DV-12~9 - 5% of a 50% solution; hydrosul~ite, such as fro~ o - 3%;
or FAS, such as from O - 2%. Typical valu~ for addition l~v~l~ 0~ theEe bl~aching ag~nts ar~ a~ ~ollow~:
~ ydro~ul~it~ - ~25 - 1.0% ~uch ~ 0.5 - 1.0% or 0.5 - l.S~
~) FAS - ~25 - l~OS
(c) hydrogon peroxida - O.S ~ 3S
~n convontional t~chnigu~, a bl~ching ~olution i~
add~d ~o 2 pulp 81Urry ~t ~ pU~p or oth~r point wh~r~
~ti~actory ~ixing can ba achi~v~d (with ~ini~u~ air contact $~ hy~ro~ul~it~ or FAS 1~ u~). Th~ pulp ~ixtur~
i~ thon hQld ~or at loa~t on~ hour ~n ~ tow~r or ch~t wh-rQ ~lnimu~ air contact 1~ allow~d ~i~ hydrosul2ito or FAS i~ u~d). ~h~ blo~ching r~action t~ko~ plac~ during t~i~ ti~
~hQ bl~aching proc~ can bæ r~p~atQd, but u~u~lly uch bl-~ch~ng lg not don~ ~or~ th~n two ti~
Tho pr~nt invontion provi~ a ~t~od for onh~n~ing the tparticularly with 30diu~ hydrosul~it~ ~ th~ bl~c~ing ~g~nt~ bl~ lnq o~ color~d ~rok~ or wa~ p~p~r wlth aubstanti~lly incra~ing ~h~ ~treng~ o~ t~ r~ul~ing ~lb~r wQb.
Tho a ~ou pulp slurry 1~ h~at~d ~o ~ t~pæra~ur~ o~
~ ro~ a~out 120 dogree~ to ~bout 180 degr~æ F (50 d~gr~s to 82 d~gr~ C). T~ pH o~ thR ~lurry i~ ~d~u~tQd o th~t _g~
~: .
2 1 2 ~
it i~ in the rang~ of 3.5 to 11Ø This pH adjustment ~ay be accomplished by using NaOH or Na2CO~ as the bas~ and ~2So~
a~ the ~cid. The addition of at l~a3t one co~pound of Fox~ul~ I or II aay be done at Any tl~ in ~ho mill ~y~tem prior to or in con~unction wi~h th9 addition of tho bl~nching agent. For xampl-, t~o addition of th~ ~dditive may be ~cco~pll~h~d by ono Or th~ ~ollowing ~thod~:
~a) An ~in- co~pound o~ For~ul~ I or II i~ add~d to the blQ~ch ~olution -(1) The a~in~ co~pound 1~ dis~olv~d in wat~r.
~2) The pH i8 ad~u~sd to 10 wi~h NaO~ or Na2CO3. ~ .
~3) Solid sodium hydro~ulXit~, ~olid FAS or a Aolution of E~02 ~ add-d and d~olvod.
~b) An amin~ c~mpound of For~ula I or II i~ blend~d wlth the bleaching agent -~1) At l~a3t one ~in~ co~pound i~ ~ixed wi~h tho soloct~d blo~hing ~g~nt. ;~
~2) Th~ bl~ndqd ~ixturo i~ th~n ~ddsd to ~h~
pulp slurry whlch ha~ ba~n pr~par~d a~ ~ :
~scr~b~d abov~
(c) An a~in~ Go~pound of For~ula I or II i~ a~ded at th~ ~a~Q ~ tho bl~aching ngent i~ add~d - :
(1) At l~At on~ a~in~ co~pound ~ Add~d to th~
pulp d urry vhich ha~ be~n pr~par~d described abov~O
2 ~
~-12~9 (2) The addition of the a~ine co~pound i~ done at ~bout the same ti~e the bleac~ing agent i~ add~d to the pulp slurry.
Th~ ~ount of amine co~pound addQd i~ ~ro~ ~bout 5 p~und- ~2.3 kilogram~) ~0.25 perc~nt addition l-val) to ~bout 20 pound3 ~9.1 kilogram~) ~1.0 p-rc~nt addition 18~el) p~r ton Or dry ~iber contont with:
~a) 5 - 50 pound~ ~2.3 -22.7 ~g) of hydrosul~it~;
~b~ 3 - 15 pound~ 6.8 kg) of FA3;
~c) 30 - 100 pound~ (18.1 - ~5.5 kg) o~ hydr~g~n peroxid~ ~50%) ~olution. (Not~ t~at ~ho~ ~kill~d in th~
art ~ay u~o dif~r~nt conc~ntration~ o~ H~O~ ~olutlon whila maintalning thi~ ratio.) Aft~r tho ~ ching ag~nt and a~in~ co~poun~ havo b~n add~d to th~ pulp lurry, th- pulp 1~ ~ixæd, pro~r~bly int~n~oly, and pr~rably und~r ~ n~rogen at~o~ph~r~ ~f ~ydrosul~it~ or FAS ~av~ ~Qn u~d, w~ ~alntain~ng the to~p~ratur~ botw~n 80 degr~ F (25 d~gr~a~ ~) and 212 dogr~ (100 d~gro~s C). I~ good ~ixing h~ b~n achi~v~d, th~ ~i~o n~od~d ~or bl~ch$ng i3 u~ually ln th~
~.
rang~ o~ ~ron ~bout on~-h~l~ hour to ~bout o~ and on~-hal~
~our~. Long~r p~rioda Or ~ ay bQ u~d i~ d~r~d or i~
conveni~nt.
Aft~r the bleaching step has been completed, th~ pulp iB cooled, ~or example, by dilution wi~h mill process or wh~tawat~r. The p~ is then ~d~usted according ~o the roquir00~nt~ o~ th~ part$cular papar n~chin~ or th~ paper product~ b-ing ~nd~. For ex~pl~, Auch pH'~ ~y bOE ln th-r~ng~ o~ ~rou about 3.5 to ~bout 11 and ~fact~d by u~ing ~ .
~ b~De ~uch a~ 30dium hydroxide or ~odium carbonats or ~n acid ~uch a~ ~ul~urlc acid. Tha ~lection of p~ i~ not part of thi~ lnvQntion. Tho~e sk~ d ln th~ ~rt will ~l~o recogniz- that the ~thod of t~is lnv0ntion ~ay al~o be u~-d with pulp~ ~hich ar~ ~ad~ wi~h partial ~mount~ of :~
colored wa~to p~p~r. `
. .~ ~'''' In ord-r to valuate t~ oct o~ thi~ hod on pulp two ~valu~tion~ ~2y bo p-r~or~d.
. ~.
Th~ rir~t ~Yaluation 1~ a ~rlg~tn~ a~ ent. Thi~ :
2 0 ~e~e~nt i~ ~on~ by ~aking pad~ u~in~ Technical A~oclat~on of th~ P~p~r ~nd Pulp Indu~try (TAPPI) S~andard M~thod T218 o~-91, incorpora~d ~y r~f~r~nc~ h~r~in in i~
~ntlroty. ~h- briqhtn~ valuation i~ th~n donQ in accord~nc~ w~th TAPPI Stan~rd ~thod TS25 o~-86, ~ncorporat~d by r~forencQ her~in in i~ ~ntir~ty.
3 $
Gen~rally ~ethod T218 om-91 describe~ t~e formation of handsheet~ for mea~uring the reflectance of pulp and ~ethod T525 om-86 doscribo3 how to mea~ur~ the di~fu~ brightne~s o~ PUlR~
Th~ ~igni~icanco of th~ briqhtnoas d~ta ahowh in Table~ I and II b-low i~ that any ~alu~ at l~st on~ point aboYe the C3.5 value for a ~amplo blo~ched with hydro~ulrite ~lOnQ i3 a ~lgni~icant i~provs~nt. Th~ NISO
Brightne~ 18 a ~ethod Or moa~uring brightne~ dev~lop~d by the Internat~onal Org~nlzation ~or S~andardization and i~ wQll known to thos~in the ~rt.
, ' ` ' ' Th~ second ovaluation i~ an a~es~Qnt of ~h~ str~ngth o~ hand~h~t~ m~de with pulp bl-~c~ed u~ing th~ procQ3~ of thi~ invontion. Hand~haot~ w~r~ m~de usinq TAPPI Stnndard Method T20S o~-88, incorporat~d by re~r~nca h~r~in in it~
ontir-ty. ~e ~ontrol 1B a hand~h~ot ~ade by t~o ~ane ~APPI a~th~d, xc~pt tha~ th~ pulp u8ed ~or th~ control hand~h~et i~ ~a~Q ~ro~ pulp bla~ch~d wi~h ~ydro~ul~ite alone and no ~thoxylated a~ne ~dditi~e. Blank~ ~re ~ade .
uging th8 ~a~ TAPPI ~thod, ex~p~ ~hat th~ ~and~he~t~ arQ
~ada ~ro~ pulp which h~ not ~-n ~reated with either or ;~
both o~ hy~ro~ul~it~ or ad~ v~. Th~ ~tr~ngth o~ the - 25 h~nd~he~ts ~ evaluat~d u~ing T~PPI Standard ~ethod ~9 . ' ~x~
2~8~
om-88, incorporated by reference herein in it~ entirety.
Thi~ T494 ~ethGd 1~ used to evaluate the tensile brea~inq prop-rti~ Or pap~r ~nd paporbo~rd u~ing ~pparatus ~or ~easuring the con~tant rate o~ ~longation.
Th~ signiric~nce o~ ~trOEngth in T~blo I wn~ deter~ined by null-hypothe~i~ t~ting ~t thæ 95~ con~idence level using tho SigoaStat ~oPtw~ro packag~ ~and011 Scienti~ic Company) which ~how~d that ~xa~plQ S w~ ~ignific~ntly high~r in t~n~ trangth t~n Exaæplo~ 1 through ~
: . .
~EXAP~I~S
ThQ Pollowing Ex~plo~ nr- illu~trativ~ o~ t~
in~ention but ~hould not bo lnterprot~d A~ li~itation~
ther-on. Unlo~ oth0rw$~0 indicatGd, all p~rcen~s ar~
weig~t p~rcent~ ~nd ~y~bol~ hn~e ~h~ir u~u~l ~nd custoEary meaning~: C i8 degr~ Centigrado, ~1 i3 ~illilitQr, kg i~
kilogra~, g ~ gra~, 1~ i~ pound, DT~A is d~thyl~n~-tr~ ~ in~p~nt~cstic acid p~nta~odiu~ ~al~. ~h~ical 20 l~ laVQ t~ir u~u~l ~n~ cuglto~ry ~anipg~
colorsd p~p~r r~ranced ln ~h~ x~pl~ ~as obtaln~d ~ro~ a lo~al o~ic~ product~ supply ~tor~ in Ch~rlott~, North Carolina ~nd w~ ~ rando~ ~loction.
2128~0 3 ~ he strength data was obtained by first for~ing handsh~ets ~ro~ the bleached pulp aacording to the TAPPI
Standard Mothod T205 o~-88 and n~suring tho ~trongth of sh~ot~ ~or~d according to the pxoc~dure descr~bed in TAPPI
S Stnndard Mothod T~94 o~-88.
All pulp~ ~d- in th~ followi~g ~xampl~ wer~ stored ~t 34 d~gre~ F ~1 doyr-~ C) until u-ed.
(Unbl~ached Pulp) A ~tocX o~ color~d l~dgQr was~ pap~r pulp was ~ad~ by the ~ollowing m~thod. To 5 1~. (2.27 kg) o~ color~d brok~
wna addad 20.7 lit~r~ of wator at 65 F (25 C) in a ~aboratory Pulp~r (Adiron~ack Machin~ Co~pany, Glynn~
Fall~, N~w York). R~pulping w~ 6~ri~d out ov~r ~ p~riod o~ 15 ~inut-~. T~ r~ulting pulp slurry (cont~ining lo p rc~nt ~olld~) wa~ u~d a~ tho ~upply o~ pulp for th~
~ollowing ~x~pl~
For ~ Exa~ple~ in wh~h ~ ching wa~ don~ with hydrog~n p~roxid~, th~ pulp ~ampl~ ~n~ ~w~kerQd to a con~tency o~ i2 ~rc~n~ (12 percent ~olid~) on a ~uchn~r funn~l ~itt~d with a #~ What~an filter paper.
. . ' '~, ~5~
2 ~. 2 8 8 ~ 3 DV-1279 For the ~xamples below, further dilution with d~ioniz~d water was done as noted. For example, Example~
$n which bl~ching was dono with hydrosul~ite, a ~ampl~ of pulp v~ diluted to ~ perc~nt consi~tency ~4 p~rcent ~olid~) with d~ion~zed watQr.
. :'"'' .~ , EXAMPLE 2 ::
(Parox~de ~le~ching) Fiv~ pla~tic bag~ wQr~ ~ach ~lled with 100 gra~ of pulp pr~par~d according to ~x~upl~ 1 and ha~ing 12 psrc-nt con~t~ncy. ~h~ b~g~ wer~ clo~d ànd pl~csd in a wat~r bat~ whlch wa~ brought up to a te~p~raturo o~ 140 degr~
F (60 dsgr0a~ C). Th~ bag~ o~ pulp ~rQ thon e~pti~d into th~ bowl (1 gallon or 3.8 liter c~pacity) ot a Nob~rt PlanQtary Ac~ion Nix~r. Whil~ ~ixlng th~ pulp, a bl~ch ~.
sQlution wa~ a~d~d lowly by ~yring~. Thi~ bl~ ch ~olu~ion W~4 ~ad~ by 2iYing:
~ a) 20 ~.l o~ ~ 10 p~re~nt (v~ight/w~1gh~) ~qu80u~ H~02 ~olut~on (-quivalon~ ~o 2 p~rc~nt H~02 on a ~ry pulp ba~
~ ) 20 ~1 o~ a 7.5 parc~nt (w~ight/~ight) ~qu~ou~
NaOH 801ution (aquiYal~nt to 105 p~rc~nt NaOH on ~ dry pulp basl~); and :~
1 2 ~ `,q DV-1279 :
(c) 20 ~1 of ~ 0.2 percent (weight/w~ight) aqu~ous :
solution o~ DTPA (equival~nt to 0.04 percent DTPA on a ~y pulp ba~io).
A~ter ~lxing tha pulp with th- bl~ach ~olution, ths .
pulp was dividod into ~ive ~qual part~ ~nd raturn~d to the plastic baga. The bag~ w~re hsld at ~he 60 dsgrQ~ C . ` `~.
temp~ratur~ ~or 90 ~inutos in a wat~r ~ath. E~ch bag o~
. .
pulp w~s rQ~ov~d ~ro~ tho b~th and placQd tn ito own be~kQr. Th~n, 10 ~1 o~ oul~urous acid ~6 p~r~ent S2 in d~ioniz~d wator) was ~dd~d with ~lxlng to ~ pulp to noutralizo tho r~sidual .p~roxid~. ~hQ bl~ach~d pulp wao thon dllut~d to 4 percent consiotoncy with d~ionizod water.
~ ropresontativ~ ~a~pl~ wao r~o~od and ~ brightn~o~ pad wao ~or~od ~ccording to tho TAPPI Standard ~othod T218 o~
. -91 re~renc~d ~bov~. Th~ brightn-s~ data i~ found in Table I. T~i- d~t~ i~ th- ~v~rag~ o~ ~oa~urQ~nt~ ta~n on two pad~
EXAMPL~ 3 20(Sodiu~ Hydro~ul~it~ U ~aching) : ~ . ~..;
S~plo~ o~ pulp (375 gra~ ~a~p~e~ o~ 4 p~rc~nt consi~toncy) pr~par~d and ~torQd according to th~ ~8~hod 0~
Xx~pla 1 w~r~ pl~c~ in two 500 ~1 wi~a ~ou~h poly~thyl~ne bottl~s (375 g~bottl~3. Th~ bottl~g w~r~ ~e~t~d ~o 150 ; ~
, ~.
2 ~2~ DV-127s degrses F (65 5 degreec C) u~ing a water bath ~h~ bottl~s were then tran~ferr2d to a deaeration station equipped with ~ ~ ;
a ~acuu~ gauge and a lino (equipp~d with a Fire~ton~ valva) attach~d to a vacuu~ ~pparatus (wat~r a~pirator~ and a nitrogen ~upply The pulp wa~ d-~Q~at~d by alternativQly ~ub~acting tho bottl- to a vacuu~ cr-ated by ~ water aDpirator and then ~lu~hing th- bo~tle wlth nitrog~n Thi~
was done three tiDe~ ~ach bottl- wa~ th~n mov~d to a mixing station con~i~ting o~ a rubber ~topper p~rman~ntly attach~d to a ring ~t~nd through ~hich ~a~ ~ounted an ovQrh~ad variablo spsed ~ixor, a p~ probo, and ~ nltrog~n line Tho rubb4r ~topp4r al80 contained an op~ning through which bloach was ad~ed via ~yr~nge Mixing was ~tart~d and tho pN wa~ ad~u~tod to 7 0 u-ing O lN NaON or O lN H~SO~ a~
roquir-d Sodius ~ydro-ul~it~ ~10 ~1 o~ ~ 1 5 p4rcent solution) (woight/weight, ~odiu~ hydro~ul~it~ ioniz~d water) wa~ then addod ~y ~yring~. S~irring w~ continu~d for 3 ~inut~-, n~t~r w~ich ~ch bottl~ wa~ r~app~d ~nd roturn~d to th~ ~at~r bath (150 d~gr~e~ F, 65 5 d~gr2~ C) ~or on~ hour Th~ pulp wa~ ~h~n r~æo~od ~ro~ th~ w~t~r ba~h and a r~pr~n~ativ~ YaDpl~ ( 3 g d~y weigh~) w~ -removed and u~d eo ~ro~ ~ brightn~ pad acco~ding to TAPP~ St~ndard ~thod T218 o~-91 r~or~nc~d abov~ Th~
~rightne~ dat~ ~ 8 found in ~abl~ I
-18- ~
...
fv~
(PoroxidR/Hydrosulfite Two Stage ileaching) An Qntiro ~amplo Or pulp pr~par~d according to the ` :
~thod o~ 2xa~pl~ 2 ~xc-pt for ~aking tho pad) was dilutsd to 4 p-roont con~i~t~ncy. Two ~ottl-~ w6ro then ~ach ~ d wit~ 375 gra~ Or ~lurry and troat~d u~ing th~
m~thod o~ ~x~pl~ 3. A brightn~s pad ~s ~ads ~ccording to TAPPI Standard MQt~Od T218 o~-91. m- brightnæs~ data 10 i8 li~t~d in Tabl~
~XA~PL~ 5 :
tHydrosul~it~ and ~tho~yl~ed Amin~ Co~pound, Pr0bl~nd~d) Two s~spl~ ~375 gra~ ~ach~ o~ ~hQ ~ pQrCent pulp ;~
slurry pr~pnr~d accordinq to t~ ~QthCd 0~ ~xa~pl~ 1 w~r~
plnced ~nto ~ch o~ two bottlQa. Th~ pulp w~ th~n troatod ~ccording to t~ hod o~ Exa~ 3, xc~pt th~ t~ lO ~l o~ 1.5 p~rc~nt w~ight/w~ight hydro~ul~ bl~ach ~olution ; :
wa~ pr~ixod ~ith 10 ~l o~ 0.75 p~rc~n~ ~y ~igh~ of tallow ~ln~ ~tho~yl~d wi~h 5 ~ol~ o~ ~thyl~nQ oxid~
b~for~ a~ltion to th~ pulp. A brightn~s ~ad ~a~ ~de according to ~APPI ~tandard ~hod T218 o~-91. Th~
brigh~n~ ata i~ t~ in Tabl~ Io :~
~?
~; 621 '~
DY-1279 :
(Nydrosulfite and Ethoxylated A~in~
~thoxylat~d A~lne Add-d First) Th~ ~thod do~cribad in ~x~mpl- S wa~ r~p~nt~d oxcept that 10 ~1 oS a 0.75 porc~nt by weight ~olution of a tallow ~in~ sthoxylat~d with 5 ~01~8 Or ~thyl~n~ oxi~e was added ~u~t prior to th~ ~dition o~ th~ 10 ~1 o~ 1.5 pQrcent waight/w~ight hydrosul~ita ~olution.
~XA~PL~ 7 Th~ ~othod oS ~x~pl~ 6 w~ rop~at~d ~xc~pt that cocoa~in~ ~thoxylatod with 5 ~ol~s oS thylan- oxide r~placed ~he a~inQ u~d in Exa~ple 6 ;"~
~XA~PLE 8 ,~ ~
Th~ ~tho~ o~ ~x~plo 6 W~8 rQp~t~d ~xcept that a tallow ~Ein~ 0thoxylat~d with 20 ~ol~ o~ ~hyl~n~ oxid r~placsd th~ ~ina u~d ~n Exa~pl~ 6~
, ` , ~` " ' ~ '' ' -20- ~:
. ', ~.
2 ~ 2 8 TABLE I ~ ; .
DESCRIPTION OF TR}3Aq~T ~;
Ex~pl~ . ISO ~r~aking NuD~r . E~rightn~ ~ngt~
(p ~rcemt) (~Q~r~) _ . , __ . . _ ., 1 Unbl-~ch~d pulp36 . O 4252_ 2 . E~roxida blo~ch~d pulE~ 44 . 0 4388 3 Sodiu~ hydro~ul~to63.5 4672 :
blalach~d pulp ~
_ 4 Peroxid~ Xollowad by72 . O 4375 hydro3ul f lts ~l~achsd P _ ~. . . . - .
}~ydrosulfit- problend-d 68.2 5537 . with a~in~ -6 Hydro~ul~it~ ~nd a~in~ 68 . 2 ~ ~:
. ~dd~d a~ a~e t~e . . _ . ~ :
7 l~ydroaul~it~ ~nd ~in~ 65 . 2 . aldd~d ~t th~ ~a ti~ . .
8 Hydro~ul~it~ ~nd ~in~ 64 . 8 _ d~d ~t 1: _ ti-- __ __ -21~
..:
..:
Claims (13)
1. A method for brightening fiber from colored waste paper while increasing the strength of the fiber web wherein said process comprises bleaching pulp made from colored waste paper with a bleaching chemical selected from the group consisting of zinc hydrosulfite, sodium hydrosulfite, formamidine sulfinic acid, and hydrogen peroxide in the presence of at least one quaternary compound selected from the group consisting of an ethoxylated amine of Formula I:
Formula I
and a propoxylated amine of Formula II:
Formula II
wherein:
R is a member of the group consisting of straight chain alkyls having 8 to 22 carbons, optionally having one to three substituents selected from methyl and ethyl;
x and y each stand for integers, x and y each have a value of at least one, x and y are selected independently, and the sum of x + y is a number from two to 12 inclusive.
Formula I
and a propoxylated amine of Formula II:
Formula II
wherein:
R is a member of the group consisting of straight chain alkyls having 8 to 22 carbons, optionally having one to three substituents selected from methyl and ethyl;
x and y each stand for integers, x and y each have a value of at least one, x and y are selected independently, and the sum of x + y is a number from two to 12 inclusive.
2. The method of Claim 1 wherein R is a straight chain alkyl group selected from the group consisting of C12-C22.
3. The method of Claim 1 wherein x and y are each independently selected from the numbers 1 to 5.
4. The method of Claim 1 wherein R has one to three substituents selected from the group consisting of methyl and ethyl.
5. The method of Claim 4 wherein the substituent is methyl.
6. The method of Claim 1 wherein the bleach solution contains at least one member from the group consisting of (a) a chelate selected from the group consisting of ethylenediaminetetraacetic acid, diethylenetriamine-pentaacetic acid, and sodium tripolyphosphate; and (b) a caustic selected from the group consisting of sodium hydroxide, sodium carbonate and calcium carbonate.
7. The method of Claim 1 wherein said compound of Formula I is a tallow amine ethoxylated with 5 moles of ethylene oxide.
8. The method of Claim 1 wherein said compound of Formula I is a coco amine ethoxylated with 5 moles of ethylene oxide.
9. The method of Claim 1 wherein said compound of Formula I is a tallow amine ethoxylated with 20 moles of ethylene oxide.
10. The method of Claim 1 wherein said method comprises a mixing method selected from the group consisting of:
(1) premixing at least one of the compounds of Formula I with said bleaching agent and adding that mixture to the pulp slurry;
(2) adding at least one compound of Formula I to the pulp slurry at about the same time the bleach is added; and (3) adding at least one compound of Formula I to the pulp slurry shortly before the bleach is added.
(1) premixing at least one of the compounds of Formula I with said bleaching agent and adding that mixture to the pulp slurry;
(2) adding at least one compound of Formula I to the pulp slurry at about the same time the bleach is added; and (3) adding at least one compound of Formula I to the pulp slurry shortly before the bleach is added.
11. The method of Claim 1 wherein said bleaching chemical contains a member selected from formamidine sulfinic acid and sodium hydrosulfite.
12. The method of Claim 11 wherein said bleaching chemical contains sodium hydrosulfite.
13. Pulp bleached by the method of Claim 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/097,745 US5560805A (en) | 1993-07-27 | 1993-07-27 | Enhanced decolorization of waste paper with selected amines |
| US08/097,745 | 1993-07-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2128805A1 true CA2128805A1 (en) | 1995-01-28 |
Family
ID=22264925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2128805 Abandoned CA2128805A1 (en) | 1993-07-27 | 1994-07-26 | Decolorization of waste paper with selected amines |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5560805A (en) |
| JP (1) | JPH0754290A (en) |
| BR (1) | BR9402944A (en) |
| CA (1) | CA2128805A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6074527A (en) | 1994-06-29 | 2000-06-13 | Kimberly-Clark Worldwide, Inc. | Production of soft paper products from coarse cellulosic fibers |
| US6001218A (en) | 1994-06-29 | 1999-12-14 | Kimberly-Clark Worldwide, Inc. | Production of soft paper products from old newspaper |
| US5582681A (en) | 1994-06-29 | 1996-12-10 | Kimberly-Clark Corporation | Production of soft paper products from old newspaper |
| US6296736B1 (en) | 1997-10-30 | 2001-10-02 | Kimberly-Clark Worldwide, Inc. | Process for modifying pulp from recycled newspapers |
| US6241849B1 (en) * | 1998-09-17 | 2001-06-05 | Novo Nordisk Biochem North America, Inc. | Methods for deinking and decolorizing printed paper |
| US6387210B1 (en) | 1998-09-30 | 2002-05-14 | Kimberly-Clark Worldwide, Inc. | Method of making sanitary paper product from coarse fibers |
| US6666950B2 (en) | 2001-11-28 | 2003-12-23 | Basf Ag | Process for deinking paper using a triglyceride |
| US6758942B2 (en) * | 2002-02-15 | 2004-07-06 | Royce Associates | Process for bleaching pulp or paper |
| FR2860129A1 (en) * | 2003-09-30 | 2005-04-01 | Antoine Vanlaer | Non-explosive disinfectant and biocidal combination, useful e.g. in dermatology or disinfection of water circuits, comprising hydrogen peroxide and fatty amine, fatty polyamine and/or guanidine |
| US8784606B2 (en) | 2009-08-03 | 2014-07-22 | Clariant Finance (Bvi) Limited | Method for reducing negative effects of adhesive contaminants in systems of substances comprising waste paper |
| EP2480719A1 (en) | 2009-09-22 | 2012-08-01 | SONOCO Development Inc. | Paperboard containing a biocide and method for making the same |
Family Cites Families (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2019124A (en) * | 1935-10-29 | Stripping agent | ||
| US1572478A (en) * | 1925-03-12 | 1926-02-09 | Hammond Grant | Process for reclaiming used paper |
| US1923178A (en) * | 1930-03-20 | 1933-08-22 | Ig Farbenindustrie Ag | Hydroxy alkyl ethers of tertiary amines and process of preparing same |
| GB400239A (en) * | 1932-03-19 | 1933-10-19 | Ici Ltd | Improvements in stripping dyed textiles |
| US2218479A (en) * | 1936-10-21 | 1940-10-15 | Floyd C Peterson | Pulping process |
| US2164930A (en) * | 1937-11-10 | 1939-07-04 | Du Pont | Process for reducing vat dyestuffs |
| US2248128A (en) * | 1939-05-10 | 1941-07-08 | Celanese Corp | Production of pattern effects on textile materials |
| US2525770A (en) * | 1946-05-17 | 1950-10-17 | Arkansas Company Inc | Baths for stripping vat-dyed textile materials and agents useful therein |
| US2587597A (en) * | 1949-07-14 | 1952-03-04 | Arkansas Company Inc | Process for removal of pigments from printed textiles and agents useful therein |
| US2860944A (en) * | 1955-11-28 | 1958-11-18 | Du Pont | Bleaching fibers of vegetable origin with formamidine sulfinate and alkaline peroxide |
| US2902453A (en) * | 1955-12-13 | 1959-09-01 | Rohm & Haas | Dye stripping solution |
| US2986488A (en) * | 1957-02-27 | 1961-05-30 | Hercules Powder Co Ltd | Method of sizing paper |
| US2985500A (en) * | 1957-12-06 | 1961-05-23 | Basf Ag | Dye stripping process employing stabilized hydroxyalkane sulfinic acid baths |
| US3074774A (en) * | 1959-10-16 | 1963-01-22 | Arkansas Company Inc | Discharge printing pastes and methods of application involving same |
| US3361794A (en) * | 1964-04-03 | 1968-01-02 | Millmaster Onyx Corp | Microbiologically active quaternary ammonium compounds |
| US3554862A (en) * | 1968-06-25 | 1971-01-12 | Riegel Textile Corp | Method for producing a fiber pulp sheet by impregnation with a long chain cationic debonding agent |
| US3617439A (en) * | 1969-01-02 | 1971-11-02 | Buckeye Cellulose Corp | Process for improving comminution pulp sheets and resulting air-laid absorbent products |
| US3666409A (en) * | 1969-01-31 | 1972-05-30 | Mitsubishi Edogawa Kagaku Kk | Method of stabilizing sodium hydrosulfite |
| US3591325A (en) * | 1969-04-25 | 1971-07-06 | Arkansas Co Inc | Products and process for removing organic pigments and dyes from dyed and printed natural and synthetic textile materials |
| US4013505A (en) * | 1972-03-09 | 1977-03-22 | Vyzkumny Ustav Papieru A Celulosy | Method of deinking printed wastepapers |
| US3960649A (en) * | 1974-10-03 | 1976-06-01 | Ventron Corporation | Wood pulp bleaching composition containing sodium hydrosulfite and hexamethylenetetramine |
| SE406482B (en) * | 1975-03-11 | 1979-02-12 | Ytkemiska Inst | PROCEDURE FOR CLEANING AN AQUATIC DISPERSION OR MASS SLUB |
| US4144122A (en) * | 1976-10-22 | 1979-03-13 | Berol Kemi Ab | Quaternary ammonium compounds and treatment of cellulose pulp and paper therewith |
| US4441962A (en) * | 1980-10-15 | 1984-04-10 | The Procter & Gamble Company | Soft, absorbent tissue paper |
| SE439787B (en) * | 1984-03-19 | 1985-07-01 | Berol Kemi Ab | WANT TO REDUCE MISCELLANEOUS AND / OR CLICKNESS DURING WASTE PAPER PREPARATION |
| DE3416043C2 (en) * | 1984-04-30 | 1986-12-04 | Akzo Gmbh, 5600 Wuppertal | Use of carboxylic acid esters or polyethers in the manufacture of paper, especially dry or wet creped papers |
| US4557801A (en) * | 1984-08-20 | 1985-12-10 | Scott Paper Company | Wet-strengthened cellulosic webs |
| US4618400A (en) * | 1984-12-28 | 1986-10-21 | Shell Oil Company | Wastepaper deinking process |
| US4666558A (en) * | 1985-12-11 | 1987-05-19 | Shell Oil Company | Process for newspaper deinking using low-foaming surfactant deinking agent |
| US4741842A (en) * | 1986-01-27 | 1988-05-03 | Colgate-Palmolive Company | Particulate detergent softener compositions comprising a mixture of cationic softener and ethoxylated amine |
| GB2215350B (en) * | 1988-03-16 | 1992-05-20 | Thiokol Morton Inc | Process for bleaching mechanical wood pulp |
| JPH02139486A (en) * | 1988-11-18 | 1990-05-29 | Kao Corp | Deinking agent |
| US5013404A (en) * | 1989-11-15 | 1991-05-07 | The Dow Chemical Company | Process for alkaline peroxide bleaching of wood pulp using a quaternary amine as additive |
| US5200034A (en) * | 1991-04-25 | 1993-04-06 | Betz Paperchem, Inc. | Use of surfactants having an HLB less than 10 in the deinking of dry toner electrostatic printed wastepaper |
| US5248388A (en) * | 1991-04-25 | 1993-09-28 | Betz Paperchem, Inc. | Use of surfactants having an HLB less than 10 in the deinking of dry toner electrostatic printed wastepaper |
| US5213661A (en) * | 1991-05-21 | 1993-05-25 | Air Products And Chemicals, Inc. | Oxygen alkali detackification in secondary fiber recovery |
| US5211809A (en) * | 1991-05-21 | 1993-05-18 | Air Products And Chemicals, Inc,. | Dye removal in oxygen color stripping of secondary fibers |
| US5227019A (en) * | 1991-07-31 | 1993-07-13 | Shell Oil Company | Wastepaper deinking process |
| JPH08225489A (en) * | 1994-11-16 | 1996-09-03 | Mitsubishi Chem Corp | Production of terephthalic acid |
-
1993
- 1993-07-27 US US08/097,745 patent/US5560805A/en not_active Expired - Fee Related
-
1994
- 1994-07-26 BR BR9402944A patent/BR9402944A/en not_active Application Discontinuation
- 1994-07-26 CA CA 2128805 patent/CA2128805A1/en not_active Abandoned
- 1994-07-27 JP JP17572894A patent/JPH0754290A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0754290A (en) | 1995-02-28 |
| US5560805A (en) | 1996-10-01 |
| BR9402944A (en) | 1995-04-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |