Process for preparing pentafluoroethane by dismutation of tetraf

Details Process for preparing pentafluoroethane by dismutation of tetraf Process for preparing pentafluoroethane by dismutation of tetraf

1993-05-11

1994-09-06

Siegel, Alan

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

Organic compounds

Halogen containing

C07C 1908

Patent

active

053450140

ABSTRACT:
Pentafluoroethane (HFC 125) is selectively prepared by dismutation of tetrafluorochloroethane (HCFC 124) effected by contacting the latter, in the gas phase, with a Cr.sub.2 O.sub.3 catalyst at temperatures ranging from 150.degree. to 330.degree. C. Along with HFC 125, also HCFC 123 substantially free from isomers 123a and 123b is obtained.

REFERENCES:
patent: 2478932 (1949-08-01), Miller
patent: 3651156 (1972-03-01), Scherer
patent: 4158675 (1979-06-01), Potter

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