Electodeionization apparatus and method
US4925541A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1986 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Sep 18, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/05
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An electrodeionization apparatus and process are provided for removing ions from liquids. Liquid to be purified is passed through depleting compartments containing mixed anion and cation exchange resin beads while a second liquid is passed through concentrating compartments free of ion exchange resin beads. Ions, under influence of a D.C. potential, pass from the depleting compartments into the concentrating compartments through ion permeable membranes. The beads in the depleting compartments are housed within subcompartments of controlled width and thickness and are retained therein by the ion permeable membranes which are secured to the wall of the subcompartments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.