Selective membrane having a high fouling resistance
US7913857B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2007 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | Jan 14, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/36
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A selective membrane having a high fouling resistance. In one embodiment, the selective membrane is a composite polyamide reverse osmosis membrane in which a hydrophilic coating is applied to the polyamide layer of the membrane, the hydrophilic coating being made by covalently bonding a hydrophilic compound to residual acid chlorides of the polyamide membrane, the hydrophilic compound including (i) at least one reactive group that is adapted to covalently bond directly to the polyamide membrane, the at least one reactive group being at least one of a primary amine and a secondary amine; and (ii) at least one non-terminal hydroxyl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.