Claims
- 1. A composite membrane for the separation of water vapors from gases, said composite membrane comprising a microporous support membrane having disposed thereon a non-porous separation layer on the basis of an originally water soluble cellulose ether, which has been made water insoluble.
- 2. A composite membrane according to claim 1, wherein said cellulose ether is at least one of a hydroxyethyl cellulose and a hydroxypropyl cellulose.
- 3. A composite membrane according to claim 1, wherein said cellulose ether is made water insoluble by cross-linking with at least one dialdehyde.
- 4. A composite membrane according to claim 1, wherein the thickness of said separation layer is 0.01 to 0.5 μm.
- 5. A composite membrane according to claim 1, wherein the thickness of said separation layer is so selected that the water vapor/gas selectivity is 100 to 20000.
- 6. A composite membrane according to claim 1, wherein said microporous support membrane consists of polyetherimide.
- 7. A composite membrane according to claim 1, wherein an additional layer of silicon is disposed on said separation layer.
Priority Claims (1)
Number |
Date |
Country |
Kind |
196 03 420 |
Jan 1996 |
DE |
|
Parent Case Info
This is a continuation in part application of international application PCT/DE97/00133 filed Jan. 24, 1997 claiming the priority of German application 196 03 420.5 filed Jan. 31, 1996.
US Referenced Citations (5)
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
PCT/DE97/00133 |
Jan 1997 |
US |
Child |
09/126297 |
|
US |