Process for the production of 1,1,1-trifluoro-2,2-dichloroethane

Details Process for the production of 1,1,1-trifluoro-2,2-dichloroethane Process for the production of 1,1,1-trifluoro-2,2-dichloroethane

1977-10-20

1979-03-20

Davis, C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2606538, C07C 1908

Patent

active

041453689

ABSTRACT:
1,1,1,-Trifluoro-2-chloroethane (fluorocarbon 133a) is chlorinated with Cl.sub.2 and product 1,1,1-trifluoro-2,2-dichloroethane (fluorocarbon 123) is recovered from the reaction mixture, as is overchlorinated byproduct 1,1,1-trifluoro-2,2,2-trichloroethane (fluorocarbon 113a). Fluorocarbon 113a is then reacted in the vapor phase with fluorocarbon 133a in the presence of a catalyst to produce more fluorocarbon 123. Preferred catalysts are activated carbon and especially chromium oxides and oxyfluorides. The product is useful in aerosol, refrigerant and foaming applications, and as an intermediate to other chlorofluoroethanes such as 1,1,1,2-tetrafluoro-1-chloroethane (fluorocarbon 124).

REFERENCES:
patent: 2598411 (1952-05-01), Miller et al.
patent: 2644845 (1953-07-01), McBee
patent: 3651156 (1972-03-01), Scherer et al.

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