Method of making thin film composite membranes
US5368889A · kind A · utility
23Cited by
36References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1993 |
| Grant date | Nov 29, 1994 |
| Priority date | — |
| Expiry date | Apr 16, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D69/1251
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of making a semipermeable composite membrane comprising a discriminating layer formed insitu by interfacial polymerization is disclosed. The method provides for removal of a water immiscible solvent for a reactant in the interfacial polymerization by physical means not requiring a phase change such as a water knife, air knife, roller, or rubber blade. Composite membranes having good flux, good salt rejection, and low levels of remaining organic solvent are obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.