METHOD FOR PURIFYING 1,1,1,3,3-PENTAFLUOROPROPANE

摘要

A method for purifying 1,1,1,3,3-pentafluoropropane (HFC-245fa) by bringing at least one extractant selected from the group consisting of: (a) compounds represented by general formula (I): CxFyHz, compounds represented by general formula (II): R1R2R3N, compounds represented by general formula (III): R4OR5, and compounds represented by general formula (IV): C1ClmHn into contact with a mixture comprising HFC-245fa and HF, subjecting the resultant liquid mixture to liquid-liquid separation to provide an extractant phase composed mainly of HFC-245fa and the extractant, and separating HFC-245fa from the extractant phase. According to this method, HFC-245fa can be efficiently separated from a mixture comprising HFC-245fa and HF.