Process for separating pentafluoroethane and 1,1,1-trifluoroethane

A process for separating pentafluoroethane, 1,1,1-trifluoroethane and chloropentafluoroethane, which comprises extracting distilling a mixed fluid comprising pentafluoroethane, 1,1,1-trifluoroethane and chloropentafluoroethane in the presence of at least one extracting agent selected from the group consisting of esters and ketones each having standard boiling point of from -10.degree. C. and 100.degree. C.

A process for separating pentafluoroethane and 1,1,1-trifluoroethane, which comprises extraction distilling a mixed fluid comprising pentafluoroethane and 1,1,1-trifluoroethane in the presence of an extracting agent which increases the specific volatility of 1,1,1-trifluoroethane to pentafluoroethane when added to the mixed fluid.

A process for separating pentafluoroethane, 1,1,1-trifluoroethane and chloropentafluoroethane, which comprises extraction distilling a mixed fluid comprising pentafluoroethane, 1,1,1-trifluoroethane and chloropentafluoroethane in the presence of an extracting agent which increases the specific volatility of 1,1,1-trifluoroethane or chloropentafluoroethane to pentafluoroethane when added to the mixed fluid .