Highly selective asymmetric membranes for gas separation and method for the manufacture thereof
US5633039A · kind A · utility
5Cited by
15References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1995 |
| Grant date | May 27, 1997 |
| Priority date | — |
| Expiry date | Dec 19, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31721
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for preparing highly selective asymmetric polymer membranes for gas separation is provided wherein the polymer is dissolved in a volatile solvent containing dioxane, and a film or tube extrusion of the polymer solution is formed. Some of the solvent is evaporated and the film or tube is contacted with a coagulant comprising acetic acid and water. The film or the tube is then dried.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.