CA2042910A1 - Process and installation for the separation of a mixture of two gaseous components - Google Patents
Process and installation for the separation of a mixture of two gaseous componentsInfo
- Publication number
- CA2042910A1 CA2042910A1 CA002042910A CA2042910A CA2042910A1 CA 2042910 A1 CA2042910 A1 CA 2042910A1 CA 002042910 A CA002042910 A CA 002042910A CA 2042910 A CA2042910 A CA 2042910A CA 2042910 A1 CA2042910 A1 CA 2042910A1
- Authority
- CA
- Canada
- Prior art keywords
- gas
- activated carbon
- mixture
- components
- eliminated
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0033—Other features
- B01D5/0036—Multiple-effect condensation; Fractional condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0033—Other features
- B01D5/0039—Recuperation of heat, e.g. use of heat pump(s), compression
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0033—Other features
- B01D5/0054—General arrangements, e.g. flow sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/24—Hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/402—Further details for adsorption processes and devices using two beds
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A B S T R A C T Process and Installation for the Separation of a Mixture of Two Gaseous Components In order to separate a mixture of two gaseous components with different boiling temperatures, it is proposed that the mixture be initially compressed and thereupon cooled so that its temperature lies below the boiling temperature of the gas components to be removed. The gas components to be removed undergo condensation and can be led off for reutilization without contaminating the environment. Furthermore, it is proposed to feed the gas mixture through activated carbon filters (4,5) after the condensation process, in order to bind remaining proportions of the gas components to be removed. It is also intended to partially return the gas mixture for renewed liquefaction after it has passed through said activated carbon filters. At the same time, the invention proposes a suitable installation for the execution of this process. - Drawing -
Description
JL~
Process and Installation for the Separation of a ________________________________________________ Mixture of Two Gaseous Components The invention concerns a process for the separation of a mixture of two gaseous components with differen-t boiling temperatures, especially of air and ahlorofluorohydro-carbons ~CFCS), formed during the reutiliæation of PUR-foamed plastics.
Processes of this generic concept are designed to i-t make possible to separate a mixture of various gaseous components with different boiling points, so that the environmentally safe gas components can be discharged into the environment, whereas environmentally harmful gas components are retained in the system, collected and reutilized.
Hitherto known processes for the sep~ration of gaseous mixtures of gas components wi-th different boiling points use only pressure. By incre~sing pressure, the boiling point is raised so that the temperature of the gas mixture lies below the boiling point of the components to be eliminated, whereupon thes0 are liquefied.
The disadvantage of prooesses of this ~ind can be seen -in their comparatively low degree of eEfeativeness and in a ' ,. : . ; ;
i, , , ~:
. ' ~ /J~
high proportion of residues of gas components to ba eliminated after passing through the lique~aoti.on s-tation, On this basis, it is the obiect of the inven-tion to provide a process and an installation for the separation of these kind of gaseous mixtures, which achieve a high degree of effectiveness in the sense that the gas components to be eliminated are only present in low quantities in the gRS
mi~ture discharged into the environment.
This object is achieved by this invention by compressing -the gas mixture and cooling i-t to a temperature below the boiling point of the gas components to be eliminated, where-upon the liquefied gas components to be eliminated are discharged into a special t~nk and the remaining gas mixture, now with only a low proportion of gas components to be eliminated, expanded and exhausted via the activated carbon filters, which extract the remaining gas components to be eliminated leaving only a minimal proportion, into -the environment. An additional cooling of the gas mixture can, on the one hand, reduce the pressure required to raise the boiling point and, on the other hand, increase condensa-tion of gas components to be eliminated at a constant temperature. The process in its entirety reaches a considerably higher degree of effectiveness -through the introduction of additional cooling as regards the elimination of gas components to be removed from the gAS
mixture. In addition, there is a considerable reduation in the loading of the activated carbon filters downs-trea~.
Furthermore, said acti-~ted cArbon filters ~re able to almost completely absorb the now low proportion of ~n~
::
'. : ., ", components in the ~AS mixture, which are to be removed.
Because of the low proportion of gas components to be removed following liquefaction under pressure and cooling, filter regener~tion is necessary only at relatively large intervals.
Furthermore, it is proposed that ufter passing through -the activ0 carbon filters, the gas mixture undergo at least partiall~ a renewed liquefaction as described in claim 1, By means of the at least partial return of the gas mixture after passing through the activated carbon filters, the concentr~tion of the gas components to be removed in the exhaust air is reduced once more.
In a further embodiment of the invention it is preferable to generate negative gage pressure within the activated carbon filters.
This negative gage pressure ensures that even in the case of a puncturing of the filter housing, due -to, for example, mechanical damaging or corrosion, nothing of the undesirable gas components to be removed is discharged into the environment.
Moreover, a process for the regeneration of -the activated carbon filters is proposed, which is distinguished by the ventila-tion of the activated carbon filters in a counter-flow direction by a heated gas, preferably hot air or an inert gas, thereby releasing from the filter the proportion of the gaseous co~lponents to be removed bound by the filtor, whereupon the resulting mixture of gaseous fil.ter res:idues , , :.
Process and Installation for the Separation of a ________________________________________________ Mixture of Two Gaseous Components The invention concerns a process for the separation of a mixture of two gaseous components with differen-t boiling temperatures, especially of air and ahlorofluorohydro-carbons ~CFCS), formed during the reutiliæation of PUR-foamed plastics.
Processes of this generic concept are designed to i-t make possible to separate a mixture of various gaseous components with different boiling points, so that the environmentally safe gas components can be discharged into the environment, whereas environmentally harmful gas components are retained in the system, collected and reutilized.
Hitherto known processes for the sep~ration of gaseous mixtures of gas components wi-th different boiling points use only pressure. By incre~sing pressure, the boiling point is raised so that the temperature of the gas mixture lies below the boiling point of the components to be eliminated, whereupon thes0 are liquefied.
The disadvantage of prooesses of this ~ind can be seen -in their comparatively low degree of eEfeativeness and in a ' ,. : . ; ;
i, , , ~:
. ' ~ /J~
high proportion of residues of gas components to ba eliminated after passing through the lique~aoti.on s-tation, On this basis, it is the obiect of the inven-tion to provide a process and an installation for the separation of these kind of gaseous mixtures, which achieve a high degree of effectiveness in the sense that the gas components to be eliminated are only present in low quantities in the gRS
mi~ture discharged into the environment.
This object is achieved by this invention by compressing -the gas mixture and cooling i-t to a temperature below the boiling point of the gas components to be eliminated, where-upon the liquefied gas components to be eliminated are discharged into a special t~nk and the remaining gas mixture, now with only a low proportion of gas components to be eliminated, expanded and exhausted via the activated carbon filters, which extract the remaining gas components to be eliminated leaving only a minimal proportion, into -the environment. An additional cooling of the gas mixture can, on the one hand, reduce the pressure required to raise the boiling point and, on the other hand, increase condensa-tion of gas components to be eliminated at a constant temperature. The process in its entirety reaches a considerably higher degree of effectiveness -through the introduction of additional cooling as regards the elimination of gas components to be removed from the gAS
mixture. In addition, there is a considerable reduation in the loading of the activated carbon filters downs-trea~.
Furthermore, said acti-~ted cArbon filters ~re able to almost completely absorb the now low proportion of ~n~
::
'. : ., ", components in the ~AS mixture, which are to be removed.
Because of the low proportion of gas components to be removed following liquefaction under pressure and cooling, filter regener~tion is necessary only at relatively large intervals.
Furthermore, it is proposed that ufter passing through -the activ0 carbon filters, the gas mixture undergo at least partiall~ a renewed liquefaction as described in claim 1, By means of the at least partial return of the gas mixture after passing through the activated carbon filters, the concentr~tion of the gas components to be removed in the exhaust air is reduced once more.
In a further embodiment of the invention it is preferable to generate negative gage pressure within the activated carbon filters.
This negative gage pressure ensures that even in the case of a puncturing of the filter housing, due -to, for example, mechanical damaging or corrosion, nothing of the undesirable gas components to be removed is discharged into the environment.
Moreover, a process for the regeneration of -the activated carbon filters is proposed, which is distinguished by the ventila-tion of the activated carbon filters in a counter-flow direction by a heated gas, preferably hot air or an inert gas, thereby releasing from the filter the proportion of the gaseous co~lponents to be removed bound by the filtor, whereupon the resulting mixture of gaseous fil.ter res:idues , , :.
2 ~3 ~
and hot gas undergoes a renewed liquefaction as described in claim 1.
The advantage involved consists -therein that the regeneration of the filters allows permanent use. I-t is not neoessary to exchange the existing activated carbon in the filters. Since regen0ration is possible wi-thout any great difficulty, almost permanent operation of the install-ation is ensured. Regeneration can take place at night or on weekends, when the instPll~tion is not being used for separation.
In addition, sn installation is proposed for the execution of the process described above, which comprises a compressor, a cooling unit, a discharge valvs for the e~pansion of the gas mixture following the liquefac-tion of the components to be removed and an activated carbon filter. The advantage involved consists primarily therein that the processes according to claims 1 to 3 can achieved with the elements of this installation economically and without difficulty.
Mor~over, in R further embodiment of the inven-tion it is preferred to equip -the installation with two parallel activated cHrbon filters and with a me~suring ~nd control instrument, which controls the composition of the gas mixture after its leaves the activated o~rbon filters Qnd diverts th0 gas flow to the o-ther raspective filter :if one of the gas filters is overloHded.
In this way, it is reliabl~ ensured tbat Q undesirable hi6h proportion of g'FlS ~omp4rlents to be removed is not dischar~ed into the environment.
. _ : :; . , :, : ~ .
2 ~ 1? ~' In the case that one of the filters is overloaded, then the gas flow is automatically diver-ted to the other respec-tive filter. This rules out any environmental contamination should the saturation of a filter be overlook~d. In addition, continued operation of the installation is ensured even if one the filters is being worked on Further details, features and advantages of the invention can be taken from the following description part in which a typical embodiment of the invention is explained in greater detail with the aid of ~ drawin~.
The drawing shows in schematic side view an installation according to this invention.
Here, the entire installation is shown in a simplified schematic form so that functional sequences are olearly seen. The direction of flow of the gas mixture i5 marked by arrows.
It can be clearly recognized that ths gas initially passes through the compression unit (1), in which the gas mixture is compressed to a temperature above the boiling point of ~:
the gas components to be removed. Gas components to be removed which li~uefy at this stage are led off into the collection tank ~7).
Afterwards, the gas mixture passes through the cooling unit (2), wh~re the largest proportion of gas CoMponents to be removed is liquefied through aondensation. Here too, the condensat~ ~as compon0nts to be removed ar~ l~d off iruto sRid oolleotion tanh (7)~ Th~rcupon, the gas mi.xture p~5SH'J
:; ` ' ' ' ' ;~ .
,:
~ g ~.7,J
through tho activated oarbon filters (4) and (5), via a disch~rge valve (3), where it is exp~nded. By means of a measuring and control instrument (6), the proportion of gas components to be removed after passing through said activated carbon filters (4,5j is detarmined. The control instrument (6) regulates the distribution of the gas mixture to said activated carbon filters (4,5), so that if one of said filters (4,5~ becomes overloaded, distribution is immediately and automatically changed over to the other respective filter. A line is also recogni~able (8), which serves the partial return of the gas mixture for liquefaction after i-t has passed through the activa-ted carbon filters.
and hot gas undergoes a renewed liquefaction as described in claim 1.
The advantage involved consists -therein that the regeneration of the filters allows permanent use. I-t is not neoessary to exchange the existing activated carbon in the filters. Since regen0ration is possible wi-thout any great difficulty, almost permanent operation of the install-ation is ensured. Regeneration can take place at night or on weekends, when the instPll~tion is not being used for separation.
In addition, sn installation is proposed for the execution of the process described above, which comprises a compressor, a cooling unit, a discharge valvs for the e~pansion of the gas mixture following the liquefac-tion of the components to be removed and an activated carbon filter. The advantage involved consists primarily therein that the processes according to claims 1 to 3 can achieved with the elements of this installation economically and without difficulty.
Mor~over, in R further embodiment of the inven-tion it is preferred to equip -the installation with two parallel activated cHrbon filters and with a me~suring ~nd control instrument, which controls the composition of the gas mixture after its leaves the activated o~rbon filters Qnd diverts th0 gas flow to the o-ther raspective filter :if one of the gas filters is overloHded.
In this way, it is reliabl~ ensured tbat Q undesirable hi6h proportion of g'FlS ~omp4rlents to be removed is not dischar~ed into the environment.
. _ : :; . , :, : ~ .
2 ~ 1? ~' In the case that one of the filters is overloaded, then the gas flow is automatically diver-ted to the other respec-tive filter. This rules out any environmental contamination should the saturation of a filter be overlook~d. In addition, continued operation of the installation is ensured even if one the filters is being worked on Further details, features and advantages of the invention can be taken from the following description part in which a typical embodiment of the invention is explained in greater detail with the aid of ~ drawin~.
The drawing shows in schematic side view an installation according to this invention.
Here, the entire installation is shown in a simplified schematic form so that functional sequences are olearly seen. The direction of flow of the gas mixture i5 marked by arrows.
It can be clearly recognized that ths gas initially passes through the compression unit (1), in which the gas mixture is compressed to a temperature above the boiling point of ~:
the gas components to be removed. Gas components to be removed which li~uefy at this stage are led off into the collection tank ~7).
Afterwards, the gas mixture passes through the cooling unit (2), wh~re the largest proportion of gas CoMponents to be removed is liquefied through aondensation. Here too, the condensat~ ~as compon0nts to be removed ar~ l~d off iruto sRid oolleotion tanh (7)~ Th~rcupon, the gas mi.xture p~5SH'J
:; ` ' ' ' ' ;~ .
,:
~ g ~.7,J
through tho activated oarbon filters (4) and (5), via a disch~rge valve (3), where it is exp~nded. By means of a measuring and control instrument (6), the proportion of gas components to be removed after passing through said activated carbon filters (4,5j is detarmined. The control instrument (6) regulates the distribution of the gas mixture to said activated carbon filters (4,5), so that if one of said filters (4,5~ becomes overloaded, distribution is immediately and automatically changed over to the other respective filter. A line is also recogni~able (8), which serves the partial return of the gas mixture for liquefaction after i-t has passed through the activa-ted carbon filters.
Claims (6)
1. Process for the separation of a mixture of two gaseous components with different boiling temperatures, especially of air and chlorofluorocarbons (CFCS), formed during the reutilization of PUR-foamed plastics, w h e r e i n the gas mixture is compressed and cooled to a temperature below the boiling point of the gas components to be eliminated, whereupon the liquefied gas components are discharged into a special tank and the remaining gas mixture, now only with a low proportion of gas components to be eliminated, expanded and exhausted via activated carbon filters, which remove the remaining gas components to be eliminated leaving a minimal proportion, into the environment.
2. Process according to claim 1 w h e r e i n the gas mixture undergoes at least partially a renewed liquefaction as described in claim 1 after passing through the activated carbon filters.
3. Process according to claims 1 or 2 w h e r e i n a negative gage pressure is generated within the activated carbon filters.
4. Process for the regeneration of the activated carbon filters required for the execution of a process according to 1 - 3 w h e r e i n the activated carbon filter is ventilated in a counterflow direction by a heated gas, preferably hot air or an inert gas, thus extracting the bound particles of the gas components to be eliminated from the filter, whereupon the resulting mixture of gaseous filter residues and hot gas undergoes renewed partial liquefaction as described in claim 1.
5. Installation for the execution of one of the processes according to one of the claims 1 to 4 w h e r e i n the installation comprises a compressor (1), a cooling unit (2), a discharge valve (3) for the expansion of the gas mixture following the liquefaction of the gas components to be eliminated and an activated carbon filter.
6. Installation according to claim 5 w h e r e i n the installation comprises two parallel activated carbon filters (4,5) and a measuring and control instrument (6), which controls the composition of the gas mixture after it has left said activated carbon filter (4,5) and which diverts the gas flow to the other respective filter (4,5) when one of said filters (4,5) is overloaded.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4016513.2 | 1990-05-22 | ||
| DE4016513A DE4016513A1 (en) | 1990-05-22 | 1990-05-22 | METHOD AND SYSTEM FOR SEPARATING A MIXTURE FROM TWO GAS-SHAPED COMPONENTS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2042910A1 true CA2042910A1 (en) | 1991-11-23 |
Family
ID=6406977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002042910A Abandoned CA2042910A1 (en) | 1990-05-22 | 1991-05-21 | Process and installation for the separation of a mixture of two gaseous components |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5269155A (en) |
| EP (1) | EP0458171B1 (en) |
| AT (1) | ATE163564T1 (en) |
| CA (1) | CA2042910A1 (en) |
| DE (2) | DE4016513A1 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4133916C2 (en) * | 1991-10-12 | 1995-06-01 | Bresch Entsorgung Gmbh | Process for the separation of chlorofluorocarbons from gas mixtures |
| DE4225436C1 (en) * | 1992-07-31 | 1993-11-25 | Daimler Benz Ag | Catalytic hardening of sand mould elements - with two-stage sepn. and removal of amine(s) and solvents from exhaust air |
| FR2755873B1 (en) * | 1996-11-15 | 1998-12-24 | Air Liquide | VOLATILE COMPOUND RECOVERY PLANT |
| US5806322A (en) * | 1997-04-07 | 1998-09-15 | York International | Refrigerant recovery method |
| US6164088A (en) * | 1998-07-27 | 2000-12-26 | Mitsubishi Denki Kaishushiki Kaisha | Method for recovering condensable gas from mixed gas and condensable gas recovering apparatus |
| US6357240B1 (en) | 1998-08-12 | 2002-03-19 | Hudson Technologies, Inc. | Apparatus and method for flushing a chiller system |
| US6164080A (en) * | 1998-08-12 | 2000-12-26 | Hudson Technologies, Inc. | Apparatus and method for flushing a refrigeration system |
| US6505475B1 (en) | 1999-08-20 | 2003-01-14 | Hudson Technologies Inc. | Method and apparatus for measuring and improving efficiency in refrigeration systems |
| FR2827189B1 (en) * | 2001-07-10 | 2003-10-24 | Commissariat Energie Atomique | METHOD AND DEVICE FOR CAPTURING THE VAPORS CONTAINED IN A GASEOUS EFFLUENT |
| US7599759B2 (en) | 2002-12-09 | 2009-10-06 | Hudson Technologies, Inc. | Method and apparatus for optimizing refrigeration systems |
| US8463441B2 (en) * | 2002-12-09 | 2013-06-11 | Hudson Technologies, Inc. | Method and apparatus for optimizing refrigeration systems |
| US7175769B1 (en) | 2003-01-24 | 2007-02-13 | Wall Thomas M | Method of filtering debris from refrigerant |
| US7443303B2 (en) | 2005-01-10 | 2008-10-28 | Hill-Rom Services, Inc. | System and method for managing workflow |
| US20060200964A1 (en) * | 2005-03-10 | 2006-09-14 | Arca, Inc. | Appliance recycling process |
| CN103687494B (en) | 2011-07-18 | 2016-05-25 | 开利公司 | The control of atmosphere in closed environment |
| CN104307305A (en) * | 2014-11-14 | 2015-01-28 | 清本环保工程(杭州)有限公司 | Gas treatment device |
| CN110270192A (en) * | 2019-07-23 | 2019-09-24 | 中国恩菲工程技术有限公司 | The exhaust gas treating method of tank field and loading system |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE383102A (en) * | 1930-11-13 | |||
| US1974145A (en) * | 1932-06-30 | 1934-09-18 | Standard Oil Co | Air conditioning |
| US2202010A (en) * | 1937-03-06 | 1940-05-28 | Mathias R Kondolf | Purging apparatus and method of use |
| US2972235A (en) * | 1958-12-05 | 1961-02-21 | Exxon Research Engineering Co | Purification of refrigerant |
| US3286442A (en) * | 1964-05-27 | 1966-11-22 | Hooker Chemical Corp | Condensation of hydrogen fluoride from non-condensable diluents |
| US4411136A (en) * | 1972-05-12 | 1983-10-25 | Funk Harald F | System for treating and recovering energy from exhaust gases |
| SE406425B (en) * | 1974-05-17 | 1979-02-12 | Smit Nijmegen Bv | PROCEDURE AND ARRANGEMENT FOR PRODUCING INERT GAS |
| US4157961A (en) * | 1975-12-23 | 1979-06-12 | Borst Adolf H | Combined waste water clarification and trash disposal system |
| DE3501643A1 (en) * | 1985-01-19 | 1986-07-24 | Hoechst Ag, 6230 Frankfurt | METHOD FOR RECOVERING SOLVENTS IN CLEANING PROCESSES |
| DE3609292A1 (en) * | 1985-10-15 | 1987-04-16 | Linde Ag | METHOD FOR REMOVING IMPURITIES FROM A GAS |
| CH673592A5 (en) * | 1987-08-11 | 1990-03-30 | Burckhardt Ag Maschf | Purificn. of gas which contains solvent - using liq. ring pump, condensers, mol. sieve beds and adsorption plant |
| US5018361A (en) * | 1988-02-09 | 1991-05-28 | Ksr Kuhlsysteme Und Recycling Gmbh & Co. Kg | Method and apparatus for disposal and reprocessing of environmentally hazardous substances from refrigeration systems |
| DE3811486A1 (en) * | 1988-04-06 | 1989-10-19 | Teves Gmbh Alfred | DEVICE FOR THE DISPOSAL OF FUEL AND / OR REFRIGERANTS |
| DE3824046A1 (en) * | 1988-07-15 | 1990-02-08 | Sep Tech Studien | Continuous process for the purification of solvent-containing exhaust air with recovery of the solvent |
| US4878931A (en) * | 1988-08-29 | 1989-11-07 | Quadrex Hps Inc. | Two stage vapor recovery system |
| CH676799A5 (en) * | 1988-11-01 | 1991-03-15 | Sulzer Ag | |
| DE3844326A1 (en) * | 1988-12-27 | 1989-05-03 | Mathias Kambach | Process for separating off and recovering chlorofluorocarbons from mixtures of chlorofluorocarbons and other gases |
| US5031410A (en) * | 1990-02-21 | 1991-07-16 | American Standard Inc. | Refrigeration system thermal purge apparatus |
-
1990
- 1990-05-22 DE DE4016513A patent/DE4016513A1/en not_active Withdrawn
-
1991
- 1991-05-15 EP EP91107819A patent/EP0458171B1/en not_active Expired - Lifetime
- 1991-05-15 DE DE59108942T patent/DE59108942D1/en not_active Expired - Fee Related
- 1991-05-15 AT AT91107819T patent/ATE163564T1/en not_active IP Right Cessation
- 1991-05-21 CA CA002042910A patent/CA2042910A1/en not_active Abandoned
- 1991-05-22 US US07/704,136 patent/US5269155A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE4016513A1 (en) | 1991-11-28 |
| EP0458171A1 (en) | 1991-11-27 |
| ATE163564T1 (en) | 1998-03-15 |
| EP0458171B1 (en) | 1998-03-04 |
| DE59108942D1 (en) | 1998-04-09 |
| US5269155A (en) | 1993-12-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19941122 |