Process for preparing pentafluoroethane by dismutation of tetrafluorochloroethane

摘要

Pentafluoroethane (HFC 125) is selectively prepared by dismutation of tetrafluorochloroethane (HCFC 124) effected by contacting the latter, in the gas phase, with a Cr2O3 catalyst at temperatures ranging from 150 DEG to 330 DEG C. Along with HFC 125, also HCFC 123 substantially free from isomers 123a and 123b is obtained.