JPS5631407A - Preparing acrylonitrile-based separation membrane - Google Patents
Preparing acrylonitrile-based separation membraneInfo
- Publication number
- JPS5631407A JPS5631407A JP10648079A JP10648079A JPS5631407A JP S5631407 A JPS5631407 A JP S5631407A JP 10648079 A JP10648079 A JP 10648079A JP 10648079 A JP10648079 A JP 10648079A JP S5631407 A JPS5631407 A JP S5631407A
- Authority
- JP
- Japan
- Prior art keywords
- membrane
- acrylonitrile
- solvent
- temperature
- 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.)
- Pending
Links
Abstract
PURPOSE: To provide an acrylonitrile-based separation membrane having separability and mechanical strength, by method wherein a stock solution containing acrylonitrile-based polymer is formed into a membrane at a temperature in the specified range and is freed from solvent under specific conditions.
CONSTITUTION: Acrylonitrile-based polymer is dissolved in dimethyl-formamide contg. formamide to give a stock solution to prepare membranes. The solution is maintained at a temperature higher than its gelling temperature to form a membrane with a desired shape. The one surface of the membrane is brought into contact with an inert atmosphere and then contact a with solution contg. less than 20wt% of a water-soluble solvent compatible with the solvent at a temperature below 40°C. Its other side is brought into contact with a solution contg. less than 50wt% of water-soluble solvent compatible with the solvent at a temperature over 0°C, to remove the solvent. The solidified film is extended to provide an acrylonitrile-based membrane of an asymmetric structure having excellent mechanical strength.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10648079A JPS5631407A (en) | 1979-08-20 | 1979-08-20 | Preparing acrylonitrile-based separation membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10648079A JPS5631407A (en) | 1979-08-20 | 1979-08-20 | Preparing acrylonitrile-based separation membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5631407A true JPS5631407A (en) | 1981-03-30 |
Family
ID=14434646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10648079A Pending JPS5631407A (en) | 1979-08-20 | 1979-08-20 | Preparing acrylonitrile-based separation membrane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5631407A (en) |
-
1979
- 1979-08-20 JP JP10648079A patent/JPS5631407A/en active Pending
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