Selective absorption of chloride from gases which contain chlorine and carbon dioxide
US3984523A · kind A · utility
12Cited by
2References
3Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 17, 1974 |
| Grant date | Oct 5, 1976 |
| Priority date | — |
| Expiry date | Jun 17, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B7/01
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a process for the dechlorination of gas mixtures containing carbon dioxide and chlorine, wherein in several absorption stages the chlorine is converted with stoichiometric alkali metal hydroxide solution into a carbonate-free alkali metal chloride-alkali metal hypochlorite solution and wherein the required stoichiometric amount of alkali metal hydroxide is introduced countercurrent to the gas stream via the last absorption stage, the improvement which comprises operating the last absorption stage in such a manner that due to free alkali metal hydroxide no alkali metal hydrogen-carbonate is present in said stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.