Sulfonated hexafluoro bis-a polysulfone membranes and process for fluid separations
US4971695A · kind A · utility
23Cited by
15References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 31, 1989 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Oct 31, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/76
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Sulfonated hexafluoro bis-A-polysulfone membranes of polymers and copolymers having the repeat unit of the structure; ##STR1## in the polymer molecule that exhibit improved permeation and separation characteristics and processes for the use thereof for separation of a component from a fluid mixture of said component in admixture with other components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.