GB1264670A - - Google Patents
Info
- Publication number
- GB1264670A GB1264670A GB1973669A GB1264670DA GB1264670A GB 1264670 A GB1264670 A GB 1264670A GB 1973669 A GB1973669 A GB 1973669A GB 1264670D A GB1264670D A GB 1264670DA GB 1264670 A GB1264670 A GB 1264670A
- Authority
- GB
- United Kingdom
- Prior art keywords
- membrane
- plasticizer
- polyol
- sulphone
- dimethyl
- 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
Links
- 239000012528 membrane Substances 0.000 abstract 7
- 239000004014 plasticizer Substances 0.000 abstract 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 4
- 229920005862 polyol Polymers 0.000 abstract 4
- 150000003077 polyols Chemical class 0.000 abstract 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 abstract 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 abstract 3
- 229920002678 cellulose Polymers 0.000 abstract 3
- 238000002386 leaching Methods 0.000 abstract 3
- 239000002904 solvent Substances 0.000 abstract 3
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 abstract 2
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 abstract 2
- NIQCNGHVCWTJSM-UHFFFAOYSA-N Dimethyl phthalate Chemical compound COC(=O)C1=CC=CC=C1C(=O)OC NIQCNGHVCWTJSM-UHFFFAOYSA-N 0.000 abstract 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 abstract 2
- ATHHXGZTWNVVOU-UHFFFAOYSA-N N-methylformamide Chemical compound CNC=O ATHHXGZTWNVVOU-UHFFFAOYSA-N 0.000 abstract 2
- 239000002202 Polyethylene glycol Substances 0.000 abstract 2
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 abstract 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Substances OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 229920001223 polyethylene glycol Polymers 0.000 abstract 2
- URAYPUMNDPQOKB-UHFFFAOYSA-N triacetin Chemical compound CC(=O)OCC(OC(C)=O)COC(C)=O URAYPUMNDPQOKB-UHFFFAOYSA-N 0.000 abstract 2
- JXPDNDHCMMOJPC-UHFFFAOYSA-N 2-hydroxybutanedinitrile Chemical compound N#CC(O)CC#N JXPDNDHCMMOJPC-UHFFFAOYSA-N 0.000 abstract 1
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 abstract 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 abstract 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical group C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 abstract 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 abstract 1
- UWHCKJMYHZGTIT-UHFFFAOYSA-N Tetraethylene glycol, Natural products OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 abstract 1
- 229930188620 butyrolactone Natural products 0.000 abstract 1
- 239000001913 cellulose Substances 0.000 abstract 1
- 229920002301 cellulose acetate Polymers 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- FBSAITBEAPNWJG-UHFFFAOYSA-N dimethyl phthalate Natural products CC(=O)OC1=CC=CC=C1OC(C)=O FBSAITBEAPNWJG-UHFFFAOYSA-N 0.000 abstract 1
- 229960001760 dimethyl sulfoxide Drugs 0.000 abstract 1
- 229940113088 dimethylacetamide Drugs 0.000 abstract 1
- 229960001826 dimethylphthalate Drugs 0.000 abstract 1
- 235000011187 glycerol Nutrition 0.000 abstract 1
- 239000001087 glyceryl triacetate Substances 0.000 abstract 1
- 235000013773 glyceryl triacetate Nutrition 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 229920000151 polyglycol Polymers 0.000 abstract 1
- 239000010695 polyglycol Substances 0.000 abstract 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 229960002622 triacetin Drugs 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
- B01D67/0023—Organic membrane manufacture by inducing porosity into non porous precursor membranes
- B01D67/003—Organic membrane manufacture by inducing porosity into non porous precursor membranes by selective elimination of components, e.g. by leaching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
- B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
- B01D67/0011—Casting solutions therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/08—Polysaccharides
- B01D71/12—Cellulose derivatives
- B01D71/14—Esters of organic acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/15—Use of additives
- B01D2323/20—Plasticizers
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
1,264,670. Cellulose membrane. DOW CHEMICAL CORP. 17 April, 1969, No. 19736/69. Heading BIX. [Also in Division B5] Permselective membranes are made by forming the membrane from a mixture comprising a cellulose ester, a plasticizer and optionally a polyol i.e. ethylene or propylene glycol or a polyglycol of M.W. up to 20,000 or glycerine, leaching the plasticizer and polyol if present, from the membrane with a liquid which is a solvent for the plasticizer but a non-solvent for the membrane with the proviso that where polyol is absent from the mixture, the membrane is immersed in a solution of plasticizer in water, or a water miscible solvent e.g. methanol or ethanol, or a polyol prior to the leaching step. Suitable plasticizers are dimethyl sulphoxide, dimethyl formamide, butyrolactone, N-methyl formamide, dimethyl acetamide, caprolactam, 2-pyrrolidone, malonitrile, triacetin, tetramethyl sulphone and ring substituted compounds thereof which are preferred. The leaching is generally effected with water or ethanol. The exemplified cellulose ester is a cellulose acetate. Exemplified plasticizers are in example I, tetramethylene, sulphone and polyethylene glycol containing four ethylene oxide units, in Example II, dimethyl phthalate and polyethylene glycol, in Example IV, tetramethylene sulphone and tetraethylene glycol, and in example VI, tetramethylene sulphone and methylene dichloride. In example IV, the membranes are in the form of fine filamentary hollow fibres whilst in all the other examples they are films.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1973669 | 1969-04-17 | ||
| DE1923187A DE1923187C2 (en) | 1969-04-17 | 1969-05-07 | Process for the production of separating membranes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1264670A true GB1264670A (en) | 1972-02-23 |
Family
ID=25757368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1973669A Expired GB1264670A (en) | 1969-04-17 | 1969-04-17 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1923187C2 (en) |
| GB (1) | GB1264670A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984004256A1 (en) * | 1983-04-20 | 1984-11-08 | Limit Instant Ltd | Treatment of membranes |
| EP0376069A2 (en) * | 1988-12-20 | 1990-07-04 | Akzo N.V. | Biocompatible dialysis membrane consisting of a mixed polysaccharide ester |
| EP0487779A1 (en) * | 1989-01-27 | 1992-06-03 | The Dow Chemical Company | Compositions useful for preparing cellulose ester membranes for liquid separations |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3792135A (en) * | 1972-01-06 | 1974-02-12 | Eastman Kodak Co | Process for manufacturing cellulosic reverse osmosis membranes using a very high temperature initial aqueous quench |
-
1969
- 1969-04-17 GB GB1973669A patent/GB1264670A/en not_active Expired
- 1969-05-07 DE DE1923187A patent/DE1923187C2/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984004256A1 (en) * | 1983-04-20 | 1984-11-08 | Limit Instant Ltd | Treatment of membranes |
| EP0376069A2 (en) * | 1988-12-20 | 1990-07-04 | Akzo N.V. | Biocompatible dialysis membrane consisting of a mixed polysaccharide ester |
| EP0376069A3 (en) * | 1988-12-20 | 1990-10-24 | Akzo N.V. | Biocompatible dialysis membrane consisting of a mixed polysaccharide ester |
| EP0487779A1 (en) * | 1989-01-27 | 1992-06-03 | The Dow Chemical Company | Compositions useful for preparing cellulose ester membranes for liquid separations |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1923187C2 (en) | 1982-07-15 |
| DE1923187A1 (en) | 1970-11-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |