Process for preparing 1,1,1,2,2-Pentafluoro-3, 3-Dichloropropane and 1,1,2,2,3-Pentafluoro-1,3-Dichloropropane.

摘要

1,1,1,2,2-Pentafluoro-3,3-dichloropropane and 1,1,2,2,3-pentafluoro-1,3-dichloropropane are prepared by reacting tetrafluoroethylene a mixture of chloroform and difluorochloromethane in the presence of a catalyst selected from the group consisting of anhydrous titanium tetrachloride and a titanium chlorofluoride of the formula: TiClxFy in which x and y are independently a number of larger than 0 and smaller than 4 provided that a sum of x and y is 4, by which by-production of 2,2-dichloro-1,1,1,3,3-pentafluoropropane is suppressed.