Catalytic process for the preparation of fluorinated halocarbons
US7786334B2 · kind B2 · utility
1Cited by
3References
7Claims
0Family size
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Key dates
| Filing date | Mar 20, 2009 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Mar 20, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/21
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is described for the preparation of 2-chloro-1,1,1-difluoroethane by the reaction of 1,2-dichloro-1,1-difluoroethane with hydrogen fluoride. in the presence of a fluorination catalyst. The process utilizes a rate enhancing reagent that is trichloroethylene, is 1-fluoro-1,2,3-trichloroethane or an aromatic rate enhancing reagent having the formulawhere R is C1 to C6 linear or branched alkyl substituted with at least one halo group, halo or nitro and R′ is C1 to C6 linear or branched alkyl substituted with at least one halo group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.