Water-treatment separating membrane of high flux having good chlorine resistance
US9370751B2 · kind B2 · utility
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Key dates
| Filing date | Apr 24, 2014 |
| Grant date | Jun 21, 2016 |
| Priority date | — |
| Expiry date | Apr 24, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A water-treatment separating membrane includes a polyamide active layer formed on999 a porous support. The ratio of a maximum value with respect to a minimum value of a ratio of a peak height of a C═O double bond of a carboxyl group (—COOH) with respect to a peak height of a C═O double bond combined with an amide group (—CONH—) is from 1.2 to 4, when measured after acid treating the polyamide active layer and by using a Fourier transform infrared spectrometer (FTIR).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.