Separation of R-12 and R-134a by a liquid-liquid extraction technique

摘要

A process for separating and purifying dichlorodifluoromethane and 1,1, 1,2 tetrafluoroethane from a feed of their mixtures by liquid- liquid extraction with extracting solvent containing paraffinic or naphthalenic mineral oils or a mixture thereof, with or without a stripping agent such as ethylene glycol or triethylene glycol or a mixture thereof.