Catalytic dehalogenation of alpha-halogenated carboxylic acids/esters
US5191118A · kind A · utility
11Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1990 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | Apr 6, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/377
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The alpha-halogenated carboxylic acids/esters are dehalogenated by reaction with hydrogen in the presence of a catalytically effective amount of (i) a Group VIII precious metal catalyst and (ii) either sulfur or a sulfur compound, or (iii) a novel precious metal/sulfur solid phase catalyst; the subject dehalogenation is especially adapted for enriching the monochloroacetic acid content of MCAA/DCAA mixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.