Process for producing semipermeable membranes
US4265959A · kind A · utility
26Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1978 |
| Grant date | May 5, 1981 |
| Priority date | — |
| Expiry date | Dec 27, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for the preparation of semipermeable membranes which comprises sulfonating porous membranes of acrylonitrile polymers containing acrylonitrile in an amount of 40% to 100% by mole. The resulting semipermeable membrane is very useful for separating substances by reverse osmosis or ultrafiltration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.