Claims
- 1. An organic liquid separation membrane for pervaporation composed of a salt of alginic acid or a salt of an alginic acid derivative having carboxylic groups at least some of which are crosslinked with polyvalent metal ions by ion exchange.
- 2. The separation membrane of claim 1 wherein the polyvalent metal ions are ions of at least one metal selected from alkaline earth metals, transition metals and metals of Groups IIIB and IVB of the periodic table.
- 3. The separation membrane of claim 1 wherein 9 to 70 mole % of the carboxylic groups are bonded to polyvalent metal ions for crosslinking.
Priority Claims (3)
Number |
Date |
Country |
Kind |
60-443 |
Jan 1985 |
JPX |
|
60-14503 |
Jan 1985 |
JPX |
|
60-63429 |
Mar 1985 |
JPX |
|
Parent Case Info
This application is a division of Ser. No. 815,453, filed Dec. 31, 1985.
US Referenced Citations (7)
Foreign Referenced Citations (6)
Number |
Date |
Country |
146655 |
Jul 1985 |
EPX |
10548 |
Apr 1979 |
JPX |
10549 |
Apr 1979 |
JPX |
49041 |
Jun 1984 |
JPX |
129104 |
Jul 1985 |
JPX |
2150140 |
Jun 1985 |
GBX |
Non-Patent Literature Citations (2)
Entry |
J. of Applied Polymer Science, vol. 26, 3223-3243 (1981). |
J. Polymer Sci.: Symposium No. 41, 145-153 (1973). |
Divisions (1)
|
Number |
Date |
Country |
Parent |
815453 |
Dec 1985 |
|