JPS56108505A - Manufacture of reverse osmotic membrane of cellulose ester - Google Patents
Manufacture of reverse osmotic membrane of cellulose esterInfo
- Publication number
- JPS56108505A JPS56108505A JP1142780A JP1142780A JPS56108505A JP S56108505 A JPS56108505 A JP S56108505A JP 1142780 A JP1142780 A JP 1142780A JP 1142780 A JP1142780 A JP 1142780A JP S56108505 A JPS56108505 A JP S56108505A
- Authority
- JP
- Japan
- Prior art keywords
- manufacture
- reverse osmotic
- osmotic membrane
- swelling agent
- cast liquid
- 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.)
- Pending
Links
- 239000012528 membrane Substances 0.000 title abstract 4
- 238000004519 manufacturing process Methods 0.000 title abstract 3
- 230000003204 osmotic effect Effects 0.000 title abstract 3
- 229920002678 cellulose Polymers 0.000 title abstract 2
- ARCGXLSVLAOJQL-UHFFFAOYSA-N trimellitic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 ARCGXLSVLAOJQL-UHFFFAOYSA-N 0.000 abstract 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract 3
- 239000003795 chemical substances by application Substances 0.000 abstract 3
- 239000007788 liquid Substances 0.000 abstract 3
- 230000008961 swelling Effects 0.000 abstract 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 abstract 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 abstract 2
- 125000001931 aliphatic group Chemical group 0.000 abstract 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 abstract 1
- 229920002284 Cellulose triacetate Polymers 0.000 abstract 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 abstract 1
- 229920002301 cellulose acetate Polymers 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000001879 gelation Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 abstract 1
- 239000005457 ice water Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
PURPOSE:To permit the manufacture of a membrane at room temperature by using a specific swelling agent in the manufacture of a reverse osmotic membrane from a cast liquid containing a cellulose ester, a solvent, and a swelling agent. CONSTITUTION:As a swelling agent, a compound of the formula I (where R is H or a C1-C4 aliphatic hydrocarbon group which may have one hydroxyl group), e.g., one or more selected from trimellitic acid and the addition products of trimellitic anhydride with a C1-C4 aliphatic monoalcohol or glycol is used. For example, a cast liquid is obtained by a procedure in which a blend of cellulose acetate and cellulose triacetate is mixed with acetone and 1,4-dioxane to form a dope, and then the dope is mixed with an aqueous or methanol solution of trimellitic acid. The cast liquid is flowed over a glass plate, allowed to stand in an atmosphere of 25 deg.C and 35% (relative humidity), for example, for 45sec, dipped in ice water for gelation, and then treated in hot water to obtain a reverse osmotic membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1142780A JPS56108505A (en) | 1980-02-04 | 1980-02-04 | Manufacture of reverse osmotic membrane of cellulose ester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1142780A JPS56108505A (en) | 1980-02-04 | 1980-02-04 | Manufacture of reverse osmotic membrane of cellulose ester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56108505A true JPS56108505A (en) | 1981-08-28 |
Family
ID=11777766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1142780A Pending JPS56108505A (en) | 1980-02-04 | 1980-02-04 | Manufacture of reverse osmotic membrane of cellulose ester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56108505A (en) |
-
1980
- 1980-02-04 JP JP1142780A patent/JPS56108505A/en active Pending
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