Sulfonated polysulfone composite semipermeable membranes and process for producing the same
US4818387A · kind A · utility
24Cited by
5References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1988 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Feb 10, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A sulfonated polysulfone composite semipermeable membrane comprising a support membrane having laminated thereon in unity a semipermeable membrane composed of a sulfonated polysulfone formed by sulfonating a polysulfone composed of a recurring unit shown by formula (A) ##STR1## wherein n is an integer of 1 or more and process for producing the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.