Dynamically formed membranes
US4659474A · kind A · utility
37Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1983 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Nov 22, 2003 |
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.