Method for preparing sulphonate salts
US6479698B1 · kind B1 · utility
2Cited by
0References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2002 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Mar 20, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention concerns a method for preparing sulphonate salts, alkaline or alkaline-earth, corresponding to anion of general formula (I):(R—CF2—SO3−)n, through alkaline hydrolysis of sulphonyl chlorides corresponding to formula (II). The invention is characterized in that it comprises at least a step which consists in alkaline hydrolysis of sulphonyl chloride carried out in the presence of a phase-transfer agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.