Skinned, asymmetric poly(phenylene ether) co-polymer membrane; gas separation unit, and preparation method thereof
US10080996B2 · kind B2 · utility
2Cited by
40References
21Claims
0Family size
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Key dates
| Filing date | Apr 30, 2015 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Apr 30, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/023
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An asymmetric membrane having a substantially non-porous surface layer is made by a method including: dissolving a poly(phenylene ether) copolymer in a solvent mixture including a first solvent and a second solvent to provide a membrane-forming composition; and phase-inverting the membrane forming composition in a first non-solvent to form the membrane comprising a substantially non-porous surface layer. The first solvent is a water-miscible polar aprotic solvent, and the second solvent is a polar solvent having two to eight carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.