Interfacially synthesized reverse osmosis membrane
US4761234A · kind A · utility
78Cited by
22References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1986 |
| Grant date | Aug 2, 1988 |
| Priority date | — |
| Expiry date | Jul 30, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/56
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A semipermeable composite membrane comprising a microporous substrate and an ultra-thin membrane with which the substrate is coated, characterized in that the ultra-thin membrane is composed of a cross-linked aromatic polyamide and the cross-linked aromatic polyamide contains a tri- or higher functional aryl residue having at least two --NH groups. The semipermeable composite membrane has a high solute rejection, high and stable water flux and durability, and thereby may be applicable to various fields.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.