Production of 2-chloro-2-hydrohexafluoropropane and azeotropes thereof with HF

摘要

A process is disclosed for the monohydrogenolysis of 2,2- dichlorohexafluoropropane to 2-chloro-2-hydrohexafluoropropane. The process involves reacting the 2,2-dichlorohexafluoropropane with hydrogen at an elevated temperature of about 150° C. or less in the presence of a catalyst containing a catalytically effective amount of palladium supported on trivalent chromium oxide in the presence of an acid of the formula HZ (where Z is Cl and/or F) to produce 2-chloro-2- hydrohexafluoropropane with a selectivity of over 70% based upon the 2,2- dichlorohexafluoropropane converted. Azeotropes of 2-chloro-2- hydrohexafluoropropane with HF are also disclosed; as are processes for producing such azeotropes.