Interfacially polymerized membranes for the reverse osmosis separation of organic solvent solutions
US5173191A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1989 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Oct 5, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G31/11
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Interfacially polymerized, crosslinked membranes on microporous, organic solvent resistant ultrafiltration membrane backing are useful for the separation of organic mixtures under reverse osmosis conditions. The membranes are prepared by depositing an aqueous (or conversely non-aqueous) solution of a first component on the microporous backing, draining off the excess quantity of this first solution and then applying a second component in the form of a non-aqueous (or conversely aqueous) solution. The two components interact and polymerize at the interface between the aqueous phase and the non-aqueous phase to produce a highly crosslinked thin polymer layer on the microporous ultrafiltration support backing layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.