Electrochemically regenerated water deionization
US9724645B2 · kind B2 · utility
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Key dates
| Filing date | Feb 2, 2012 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Nov 6, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/22
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus and method for abating scale formation during the purification and demineralization of water in an electrochemical deionization apparatus. In the apparatus and method, scale forming ions in a raw water feed are precipitated at a controlled location remote from the deionization chambers of the deionization apparatus. Concentrate water produced during the deionization process to produce demineralized product water is acidified and circulated through the deionization apparatus to prevent scale formation and build-up in the deionization apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.