Apparatus for producing deionized water
US6338784B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 26, 1998 |
| Grant date | Jan 15, 2002 |
| Priority date | — |
| Expiry date | Feb 26, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/469
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus for producing deionized water, comprising an electrodialyzer having cation exchange membranes and anion exchange membranes alternately arranged to form demineralizing compartments and concentrating compartments and having ion exchangers accommodated in the demineralizing compartments, and designed to conduct an electric current while supplying water to be treated to the demineralizing compartments, wherein a spacer is arranged in each concentrating compartment to maintain the thickness of the concentrating compartment, and the cation exchange membranes or the anion exchange membranes are incorporated in their dry state in the electrodialyzer, whereby water is supplied to the electrodialyzer, while each ion exchange membrane is brought in contact with the spacer by a pressure from the demineralizing compartment side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.