Selectively reacting olefins having a terminal CF2 group in a mixture

122 1 2 16 16 defghk 345635 6 16 16 5 6 4 16 16 3 318 18 18 122 A process is disclosed for reducing the mole ratio of (1) compounds of the formula YYC═CFwherein Yand Yare each independently H, F, Cl, Br, C-Calkyl or C-Chaloalkyl containing no more than 3 chlorine substituents, 2 bromine substituents and 1 iodo substituent to (2) saturated compounds of the formula CHFClBrIwherein d is an integer from 1 to 10, and e+f+g+h+k is equal to 2d+2, provided that g is 0, 1, 2 or 3, h is 0, 1 or 2 and k is 0 or 1 and/or unsaturated compounds of the formula YYC═CYY, wherein Y, Yand Yare each independently H, F, Cl, Br, C-Calkyl or C-Chaloalkyl containing no more than 3 chlorine substituents, 2 bromine substituents and 1 iodo substituent, provided that Yand Yare not both F, and Yis C-Calkyl or C-Chaloalkyl containing no more than 3 chlorine substituents, 2 bromine substituents and 1 iodo substituent, in a mixture. The process involves contacting the mixture with at least one selective removal agent selected from the group consisting of SOand RSOH, wherein R is selected from the group consisting of F, Cl, OH, C-Calkyl, C-Cfluoroalkyl, and C-Cfluoroalkoxyalkyl containing no more than two ether oxygens to selectively react the formula YYC═CFcompounds.