Method of treating polyamide membranes to increase flux
US5755964A · kind A · utility
50Cited by
10References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1996 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Feb 2, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/56
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The flux of a composite reverse osmosis or nanofiltration membrane having a polyamide discriminating layer is enhanced in a one-step process in which the discriminating layer is treated with ammonia or certain alkylamines. It is possible to control both rejection rate and flux of the membrane as well as convert reverse osmosis membranes into nanofiltration membranes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.