Method for hydrogen ion-selective electrodialysis
US5300204A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1993 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | Feb 17, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2387/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for hydrogen ion-selective electrodialysis, wherein from an aqueous solution containing hydrogen ions on an anode side, the hydrogen ions are selectively permitted to permeate through a membrane to a cathode side, wherein the membrane is a double layer ion exchange membrane comprising an anion exchanger layer on the anode side and a cation exchanger layer on the cathode side, and the anion exchanger layer has an ion exchange capacity of from 0.5 to 4 meq/g dry resin, a fixed ion concentration of from 1 to 10 meq/g H.sub.2 O, a thickness of from 0.1 to 150 .mu.m and an electrical resistance of at most 1 .OMEGA..multidot.cm.sup.2 as measured in a 0.5 mol/l sulfuric acid solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.