Durable asymmetric composite membranes and modified substrates used in their preparation
US11291215B2 · kind B2 · utility
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5Claims
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Key dates
| Filing date | Mar 11, 2019 |
| Grant date | Apr 5, 2022 |
| Priority date | — |
| Expiry date | Mar 11, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Durable asymmetric composite membranes consisting essentially of a film of cross-linked sulfonated poly(ether ether ketone) adhered to a sheet of hydrophilicitized microporous poly(ethylene) are disclosed. The membranes have application in the recovery of water from feed streams where the ability to clean in situ is desirable, for example in dairy processing. Methods of preparing cross-linked sulfonated poly(ether ether ketone) suitable for use as the rejection layer and hydrophilicitized sheets of microporous poly(ethylene) suitable for use as the support layer of such membranes are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.