Method of preparing trifluoroacetic acid from trichlorotrifluoroethane
US4647695A · kind A · utility
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3Claims
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Key dates
| Filing date | Mar 19, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Mar 19, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/093
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Trifluoroacetic acid is easily formed by hydrolysis of 1,1,1-trichloro-2,2,2-trifluoroethane with water in the presence of a catalyst comprising an inorganic metal compound, preferably a chloride of Mn, Fe, Co, Ni, Cu or Zn. Preferably the hydrolysis reaction is carried out as a vapor phase contact reaction at 200.degree.-400.degree. C., using 5-15 moles of water per mole of trichlorotrifluoroethane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.