| abstract |
A process is provided for producing 1,1,1-trifluoro-2,2-dichloroethane of formula (I) wherein pentachloroethane of formula (II) is reacted with hydrofluoric acid in the presence of a mixed catalyst either of pentahaloantimony of general formula (III) and MX2L2 of general formula (IV) or of pentahaloantimony of general formula (III) and MX2(L-L) of general formula (V) -CF3CHCl2 (I) -CCl3CHCl2 (II) -SbX5 (III) -MX2L2 (IV) -MX2(L-L) (V) - wherein, X is a chloro or bromo group, M is nickel, palladium or platinum, L is represented by PR3 in which R is phenyl, methyl, ethyl, iso-propyl, n-butyl or tert-butyl and L-L is 1,2-bis (diphenylphosphino) ethane (DIPOS), 1,2-diaminoethane or S2CH2. |