Process for removing chlorate salt from aqueous alkali chloride solution
US5279717A · kind A · utility
2Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1991 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Nov 29, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01D3/14
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to processes for removing chlorate salts from an aqueous alkali chloride solution employed in cation-exchange membrane electrolysis, comprising the steps of adding hydrochloric acid to an aqueous alkali chloride solution to form a reaction solution, and maintaining the absolute pressure of the reaction solution at a range not higher than 600 mmHg and not lower than the saturated vapor pressure of the solution in a decomposition vessel and/or feeding the reaction solution to the bottom portion of a decomposition vessel and causing the reaction solution to flow upward in the decomposition vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.