Membrane derived from polyfunctional amine and combination of different polyfunctional amine-reactive monomers
US9925500B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2013 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Sep 19, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for making a composite polyamide membrane including a porous support and a thin film polyamide layer including the steps of applying a polyfunctional amine monomer and a combination amine-reactive compounds to a surface of the porous support and reacting the constituents to form a thin film polyamide layer, wherein the amine-reactive compounds include: i) a polyfunctional amine-reactive monomer including two to three amine-reactive moieties selected from acyl halide, sulfonyl halide and anhydride, ii) a polyfunctional amine-reactive monomer including at least four amine-reactive moieties selected from acyl halide, sulfonyl halide and anhydride, and iii) an acid compound including at least on carboxylic acid moiety or salt thereof and at least one amine-reactive moiety selected from acyl halide and sulfonyl halide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.