GB203713A - Improvements in and relating to membranes for ultra filtration and dialysis - Google Patents
Improvements in and relating to membranes for ultra filtration and dialysisInfo
- Publication number
- GB203713A GB203713A GB22639/23A GB2263923A GB203713A GB 203713 A GB203713 A GB 203713A GB 22639/23 A GB22639/23 A GB 22639/23A GB 2263923 A GB2263923 A GB 2263923A GB 203713 A GB203713 A GB 203713A
- Authority
- GB
- United Kingdom
- Prior art keywords
- water
- film
- solvent
- dialysis
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000012528 membrane Substances 0.000 title abstract 7
- 238000000502 dialysis Methods 0.000 title abstract 4
- 238000000108 ultra-filtration Methods 0.000 title abstract 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 abstract 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 12
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 6
- 239000002904 solvent Substances 0.000 abstract 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 abstract 4
- 239000007788 liquid Substances 0.000 abstract 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 abstract 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 2
- 229920002301 cellulose acetate Polymers 0.000 abstract 2
- 239000004744 fabric Substances 0.000 abstract 2
- 238000007689 inspection Methods 0.000 abstract 2
- 230000001376 precipitating effect Effects 0.000 abstract 2
- 238000002360 preparation method Methods 0.000 abstract 2
- 238000005406 washing Methods 0.000 abstract 2
- 239000000701 coagulant Substances 0.000 abstract 1
- 239000003960 organic solvent Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
Classifications
-
- 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
- B01D71/16—Cellulose acetate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Porous membranes of cellulose acetate are prepared by precipitating a film of such solution with an aqueous non-solvent, and subsequently treating the water-bearing film with a solvent miscible with water and with a solvent organic liquid. In an example, the acetate is dissolved in acetic acid, and the coagulent is water; such a film is impregnated with water, and for the dialysis of a benzene solution the water must first be removed by washing with alcohol, acetone, or other liquid miscible both with water and benzene. To give greater strength to the membrane, the film may be applied to a support such as cloth. The Specification as open to inspection under Sect. 91 (3) (a) refers to the preparation of the membrane by allowing the film to dry incompletely. This subject-matter does not appear in the Specification accepted.ALSO:Porous membranes adapted for the dialysis or ultra-filtration of solutions of fatty bodies and resins in organic solvents, are prepared from solutions of cellulose acetate by precipitating a film of such solution by the addition of an aqueous non-solvent, and subsequent treatment of the water-bearing film with a solvent miscible with water and with the solvent of the solution to be filtered. In an example, the acetate is dissolved in acetic acid, and the coagulant is water; such a film is impregnated with water, and for the dialysis of a benzene solution the water must first be removed by washing with alcohol, acetone, or other liquid miscible both with water and benzene. To give greater strength to the membrane, the film may be applied to a support such as cloth. Specification 134,228 is referred to. The Specification as open to inspection under Sect. 91 (3) (a) refers to the preparation of a membrane by allowing the film to dry incompletely. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR203713X | 1922-09-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB203713A true GB203713A (en) | 1924-10-02 |
Family
ID=8880209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22639/23A Expired GB203713A (en) | 1922-09-11 | 1923-09-08 | Improvements in and relating to membranes for ultra filtration and dialysis |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB203713A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3344214A (en) * | 1964-03-25 | 1967-09-26 | Univ California | Methods of preparing a semipermeable membrane |
-
1923
- 1923-09-08 GB GB22639/23A patent/GB203713A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3344214A (en) * | 1964-03-25 | 1967-09-26 | Univ California | Methods of preparing a semipermeable membrane |
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