Method for electrolysis of alkali chloride
US6488833B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 8, 2001 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Mar 8, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B15/08
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Provided is a process which permits, upon preparation of chlorine and a caustic alkali by electrolyzing an aqueous alkali chloride solution in an ion-exchange-membrane-method alkali chloride electrolytic cell equipped with a gas diffusion cathode, decrease of an excess ratio of an oxygen containing gas to be fed newly to the gas diffusion cathode and facilitates temperature control of the electrolytic cell. A process for electrolyzing an alkali chloride comprising: introducing saline water into an anode chamber of an ion-exchange-membrane-method alkali chloride electrolytic cell equipped with a gas diffusion cathode; and introducing an oxygen-containing gas into a gas chamber of a gas diffusion cathode, to thereby obtain chlorine in the anode chamber and an aqueous caustic alkali solution in the cathode chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.