Process for the manufacture of 1,1,1-trifluorodichloroethane and

Details Process for the manufacture of 1,1,1-trifluorodichloroethane and Process for the manufacture of 1,1,1-trifluorodichloroethane and

1987-10-22

1989-06-27

Evans, J. E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

423595, 570168, C07C 1720, C07C 1902

Patent

active

048431818

ABSTRACT:
An improved gas-phase process for the manufacture of 1,1,1-trifluorodichloroethane and/or 1,1,1,2-tetrafluorochloroethane by contacting a suitable tetrahaloethylene and/or pentahaloethane with hydrogen fluoride in the presence of Cr.sub.2 O.sub.3, prepared by pyrolysis of (NH.sub.4).sub.2 Cr.sub.2 O.sub.7, the reaction being conducted under controlled conditions whereby the production of pentafluoroethane is minimized.

REFERENCES:
patent: 2458551 (1949-01-01), Benning et al.
patent: 2576823 (1951-11-01), Benning et al.
patent: 3183276 (1965-05-01), Vecchio
patent: 3258500 (1966-06-01), Swamer et al.
patent: 3755477 (1973-08-01), Firth et al.
patent: 3803241 (1974-04-01), Stolkin et al.
patent: 4748285 (1988-05-01), Foulletier

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