Composite semipermeable membrane and production method thereof
US5744039A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1997 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Jan 29, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D69/1251
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed are a composite semipermeable membrane which is excellent in the chlorine resistance and also gives a high desalting faculty and a large water flux, in particular, under a low operation pressure and a production method thereof. The composite semipermeable membrane comprises a porous base material having formed thereon a semipermeable thin film formed by crosslinking polymerization of 2,6-diaminotoluene monomer or a mixture of 2,6-diaminotoluene monomer and other amino compound monomer with a polyfunctional crosslinking agent having at least two functional groups capable of reacting with the amino group(s) of the monomer(s) in one molecule in the presence of an amine salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.