Polymer composite membrane
US4871461A · kind A · utility
20Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1988 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | Jan 15, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/80
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A permeable membrane through which water or its vapor permeates selectively nd which contains a polyion complex formed by the association by an ionic bond between an anionic polymer and a cationic polymer on the surface of the membrane and/or in the membrane. This membrane is useful in the separation of water from an aqueous solution of an organic substance or a gaseous mixture of water with an organic substance, and exhibits excellent resistance to solvent, particularly water, and a high permeation rate and a high separation coefficient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.