Process for preparing chlorine dioxide
US4678653A · kind A · utility
2Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1985 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Apr 23, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B11/025
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for production of chlorine dioxide and chlorine by reacting sodium chlorate with chloride ions and sulfuric acid where the chlorine ions partly are obtained from hydrochloric acid is described. In the process chlorine obtained as a by-product is reacted with sulfur dioxide in a reactor equipped with a condenser. The heat of reaction is removed by keeping the reactor at or above the boiling point of the reaction medium and the vapors are condensed in the condenser and brought back to the reactor. The obtained mixed acid comprising sulfuric acid and hydrochloric acid is returned to the chlorine dioxide reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.