Process for improving semipermeable membranes by treating with protic acids or inorganic salts
US4268662A · kind A · utility
8Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1979 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Mar 5, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D67/009
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for improving the performances of semipermeable membranes which comprise an acrylonitrile polymer containing 40 to 100% by mole of acrylonitrile and have a bubble point of more than 0.1 kg/cm.sup.2, by dipping said membranes in an aqueous solution containing inorganic salts and/or protic acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.