Preparation of 1-chloro-2-trifluoromethyl-3,3,3-trifluoropropene

Details Preparation of 1-chloro-2-trifluoromethyl-3,3,3-trifluoropropene Preparation of 1-chloro-2-trifluoromethyl-3,3,3-trifluoropropene

1976-12-27

1978-03-28

Davis, C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2606533, 2606535, 2606537, C07C 2118

Patent

active

040814874

ABSTRACT:
Isobutane is catalytically converted to 1-chloro-2-trifluoromethyl-3,3,3-trifluor propene [(CF.sub.3).sub.2 C = CHCl] in a dehydro/chlorofluorination reaction zone by passing a mixture of anhydrous hydrogen fluoride, chlorine and the isobutane over a chromium oxide or metal fluoride dehydro/chlorofluorination catalyst. Alternatively, the isobutane feed is first prechlorinated, and the mixture of prechlorination fed for conversion to the desired (CF.sub.3).sub.2 C = CHCl, to a downstream fluorination reactor charged with the dehydro/chlorofluorination catalyst.

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