Purification of hydrochloric acid obtained as by-product in the synthesis of methanesulfonic acid
US7128890B2 · kind B2 · utility
27Cited by
7References
4Claims
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Key dates
| Filing date | Jun 23, 2005 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Jun 23, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B7/0706
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for purifying the hydrochloric acid obtained as by-product in the synthesis of MSA, characterized in that the gaseous flow of hydrogen chloride evacuated from the top of the synthesis reactor is placed in contact in a treatment column, counter-currentwise, with a flow consisting of an aqueous solution of an acid chosen from methanesulfonic acid, hydrochloric acid or a mixture of these two acids, at a temperature of between 80 and 130° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.