Asymmetric membranes for use in nanofiltration
US10328396B2 · kind B2 · utility
1Cited by
39References
17Claims
0Family size
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Key dates
| Filing date | Nov 3, 2016 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Nov 3, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/0231
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Improved integrally skinned asymmetric membranes for organic solvent nanofiltration, and their methods of preparation and use are disclosed. Membranes are formed from polybenzimidazoles by phase inversion and are then crosslinked by addition of crosslinking agents. These stabilize the membranes and allow solvent nanofiltration to be maintained even in the solvents from which the membranes were formed by phase inversion, and in strongly acidic and strongly basic solvents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.