High flux RO/UF membranes
US4889636A · kind A · utility
27Cited by
7References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1986 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Jul 11, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/60
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Dynamic membranes are obtained by coating on a porous polymeric substrate containing functional groups a chemically reactive hydrophilic polymer from a dilute aqueous solution under pressure and crosslinking said polymer present on the porous substrate as thin layer with low molecular polyfunctional compounds. The new membranes show good solvent and compaction resistance and resistance to separation of the individual layers. They can be used in ultrafiltration and reverse osmosis processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.