Cation exchange membrane selectively permeable to monovalent cations and method for its production
US6569301B2 · kind B2 · utility
0Cited by
7References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 28, 2001 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Dec 21, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2389/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a cation exchange membrane which has excellent durability, a high limiting current density, a low direct current membrane resistance and excellent selectivity to monovalent cations. In the present invention, a cation exchange membrane excellent in selective permeability to monovalent cations is produced by bringing high molecular cations into contact with a surface of a cation exchange membrane in the presence of anions of an oxyacid or anions of an organic sulfonic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.