Composite reverse osmosis membrane
US5674398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1995 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Jun 29, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/56
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composite reverse osmosis membrane comprising a thin film and a microporous substrate as a support therefor, said thin film mainly comprising a crosslinked polyamide obtained by the interfacial polymerization of PA0 (a) an amine component comprising at least one monomeric amine compound having at least two primary or/and secondary amino groups and PA0 (b) an acid halide component which is either a benzenehexacarbonyl halide or a mixture of a benzenehexacarbonyl halide with a monomeric acid halide compound having at least two acid halide groups. The composite reverse osmosis membrane exhibits high water permeability and high desalting performance even when used at a low operation pressure of, e.g., 5 kgf/cm.sup.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.