Separation membrane comprising polyethersulfone, process for producing thereof, and dope solution for membrane production
US8505746B2 · kind B2 · utility
1Cited by
4References
8Claims
0Family size
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Key dates
| Filing date | Sep 30, 2008 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Jan 21, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A dope solution for membrane production comprising polyethersulfone having high strength, high water permeability, a high rejecting ability and excellent contamination resistance, a separation membrane, and a process for producing the separation membrane are provided. The dope solution for membrane production contains a polyethersulfone and a solvent for thermally induced phase separation selected from the group consisting of 3-pyridinemethanol, 4-methyl-1,3-dioxolane-2-one, 4-benzylpiperidine, trimethyl phosphate, 1,3-dioxolane-2-one and mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.