Composite semipermeable membrane
US9827536B2 · kind B2 · utility
2Cited by
2References
5Claims
0Family size
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Key dates
| Filing date | Sep 19, 2013 |
| Grant date | Nov 28, 2017 |
| Priority date | — |
| Expiry date | Mar 23, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Provided is a composite semipermeable membrane having a high salt removal rate and a high water permeability. The composite semipermeable membrane comprises a substrate, a porous support layer formed on the substrate, and a separation functional layer formed on the porous support layer, the hydrophilic macromolecule concentration on the substrate-side surface of the porous support layer being higher than that on the separation functional layer-side surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.