CH516942A - Verfahren zur Herstellung semipermeabler Membranen - Google Patents
Verfahren zur Herstellung semipermeabler MembranenInfo
- Publication number
- CH516942A CH516942A CH344268A CH344268A CH516942A CH 516942 A CH516942 A CH 516942A CH 344268 A CH344268 A CH 344268A CH 344268 A CH344268 A CH 344268A CH 516942 A CH516942 A CH 516942A
- Authority
- CH
- Switzerland
- Prior art keywords
- membrane
- solvent
- casting
- weight
- percent
- Prior art date
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 50
- 238000005266 casting Methods 0.000 title abstract description 27
- 229920002301 cellulose acetate Polymers 0.000 title description 10
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 6
- 239000000725 suspension Substances 0.000 claims description 3
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 abstract description 43
- 239000002904 solvent Substances 0.000 abstract description 26
- 235000005074 zinc chloride Nutrition 0.000 abstract description 24
- 239000011592 zinc chloride Substances 0.000 abstract description 24
- 229920002678 cellulose Polymers 0.000 abstract description 16
- 230000007062 hydrolysis Effects 0.000 abstract description 6
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 6
- 150000002148 esters Chemical class 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000007127 saponification reaction Methods 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 2
- 238000011033 desalting Methods 0.000 abstract 1
- 239000003651 drinking water Substances 0.000 abstract 1
- 235000020188 drinking water Nutrition 0.000 abstract 1
- 239000010865 sewage Substances 0.000 abstract 1
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 20
- 230000014759 maintenance of location Effects 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 12
- 238000007654 immersion Methods 0.000 description 11
- 239000003960 organic solvent Substances 0.000 description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 230000001419 dependent effect Effects 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- ZJZXSOKJEJFHCP-UHFFFAOYSA-M lithium;thiocyanate Chemical compound [Li+].[S-]C#N ZJZXSOKJEJFHCP-UHFFFAOYSA-M 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical class [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- DKAGJZJALZXOOV-UHFFFAOYSA-N hydrate;hydrochloride Chemical compound O.Cl DKAGJZJALZXOOV-UHFFFAOYSA-N 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 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
- 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
- B01D67/0016—Coagulation
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB11015/67A GB1158512A (en) | 1967-03-08 | 1967-03-08 | Process for the manufacture of Reverse Osmosis Membranes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH516942A true CH516942A (de) | 1971-12-31 |
Family
ID=9978486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH344268A CH516942A (de) | 1967-03-08 | 1968-03-08 | Verfahren zur Herstellung semipermeabler Membranen |
Country Status (8)
| Country | Link |
|---|---|
| BE (1) | BE711950A (cs) |
| CH (1) | CH516942A (cs) |
| DE (1) | DE1642792B2 (cs) |
| ES (1) | ES351354A1 (cs) |
| FR (1) | FR1555331A (cs) |
| GB (1) | GB1158512A (cs) |
| IL (1) | IL29555A (cs) |
| NL (1) | NL6803244A (cs) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4176668A (en) * | 1977-05-02 | 1979-12-04 | Amf Incorporated | Novel reconstituted tobacco sheets and process |
| DE3066996D1 (en) * | 1979-09-19 | 1984-04-19 | Aligena Ag | Porous semipermeable cellulose acetate membranes modified by ionic groups, process for their production and their use |
-
1967
- 1967-03-08 GB GB11015/67A patent/GB1158512A/en not_active Expired
-
1968
- 1968-03-01 IL IL29555A patent/IL29555A/en unknown
- 1968-03-05 FR FR1555331D patent/FR1555331A/fr not_active Expired
- 1968-03-07 ES ES351354A patent/ES351354A1/es not_active Expired
- 1968-03-07 NL NL6803244A patent/NL6803244A/xx unknown
- 1968-03-08 BE BE711950D patent/BE711950A/xx unknown
- 1968-03-08 CH CH344268A patent/CH516942A/de not_active IP Right Cessation
- 1968-03-08 DE DE1642792A patent/DE1642792B2/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE1642792B2 (de) | 1978-09-07 |
| IL29555A (en) | 1972-04-27 |
| BE711950A (cs) | 1968-07-15 |
| ES351354A1 (es) | 1969-12-01 |
| DE1642792A1 (de) | 1971-02-25 |
| FR1555331A (cs) | 1969-01-24 |
| GB1158512A (en) | 1969-07-16 |
| NL6803244A (cs) | 1968-09-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |