Composite semi-permeable membrane
US12318738B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Oct 30, 2020 |
| Grant date | Jun 3, 2025 |
| Priority date | — |
| Expiry date | Feb 19, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A20/131
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a composite semipermeable membrane including: a support membrane including a base and a porous support layer; and a separation functional layer disposed on the porous support layer and including a crosslinked aromatic polyamide, in which the separation functional layer contains sulfo groups in an amount of 7.0×10−5 to 5.0×10−2 g/m2 and includes a structure represented by the formula 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.