Process and apparatus for treatment of fluids, particularly demineralization of aqueous solutions
US4687561A · kind A · utility
Inventor
Key dates
| Filing date | May 20, 1985 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | May 20, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/469
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Process and apparatus are provided for demineralizing aqueous solutions without using regenerating chemicals. Oppositely charged ions are electrolytically generated within electrode chambers and diffused into the stream of aqueous solution to be demineralized flowing in cross-current thereto. In their migration in response to the application of an electric potential, the ion streams are subjected to displacement steps in cation and anion exchange masses separated by selectively permeable ion exchange membranes. The aqueous solution alternately passes through the cation and anion exchange masses resulting in a demineralized aqueous stream and an enriched brine stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.