the gas chromatographic analysis of the product is as follows ______________________________________r 225aa 2 5 r 225ca 51 4 r 225cb 41 1 chloroform 1 9 r 224 sup 1 1 4 r 226 223 etc 1 7 ______________________________________ note sup 1 r224 represents a mixture of trichlorotetrafluoropropane isomers in the same manner as in example 1 but using a mixture of r 225ca and r 225cb in a weight ratio of 54 46 as a solvent the reaction was carried out the increase of the product weight after the reaction was 30 2 g the result of the gas chromatographic analysis of the product is as follows ______________________________________r 225ca 46 3 r 225cb 50 1 chloroform 1 2 r 224ca 0 9 r 226 223 etc 1 5 ______________________________________ no r225aa was detected in the same flask as used in example 1 chloroform 40 g and anhydrous zircorium tetrachloride 2 g were charged while stirring the content with a magnetic stirrer r 22 and tfe were premixed and supplied in the flask through the inlet tube at flow rates of 20 cc min and 40 cc min respectively the reaction temperature was 5 to 10 u00b0 c in the course of the reaction the reaction mixture was analyzed by the gas chromatography to reveal that the amount of chloroform decreased and amounts of r 225ca and r 225cb increased as time passed the reaction was continued until the content of chloroform decreased to 0 1 after the reaction the weight of the reaction mixture was 127 4 g and it had the following composition in a sus 316 made 100 ml autoclave anhydrous zirconium tetrachloride 4 g was charged and cooled with dry ice r 21 30 9.