Preparation of strong and super acid catalysts using elemental fluorine
US5220087A · kind A · utility
5Cited by
9References
14Claims
0Family size
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Key dates
| Filing date | Dec 13, 1991 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | Dec 13, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2531/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A fluorinated cation exchange resin catalyst is prepared by contacting a polymer containing pendant acid groups, particularly the radical --SO.sub.3 X with elemental fluorine in the presence of a water-free halogenated hydrocarbon liquid and thereafter converting the resulting pendant --SO.sub.3 X radical to a free acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.