Process for the purification of an alkanesulphonyl chloride and of the corresponding alkanesulphonic acid
US5801283A · kind A · utility
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10Claims
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Key dates
| Filing date | Apr 24, 1997 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | Apr 24, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/44
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The process for the purification of an alkanesulphonyl chloride (ASC) in order to reduce the sulphate content thereof consists in washing the alkanesulphonyl chloride with water or with an aqueous solution of an acid having a pH of between -0.57 and 7 and then in separating the alkanesulphonyl chloride thus purified from the aqueous phase. This purified ASC leads, by total hydrolysis, to alkanesulphonic acid with a low content of sulphuric acid.
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