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

1977-11-21

1978-08-29

Davis, C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2606533, 2606535, 2606537, 260660, C07C 1720

Patent

active

041104072

ABSTRACT:
Isobutane is catalytically converted to 1-chloro-2-trifluoromethyl-3,3,3-trifluoropropene [(CF.sub.3).sub.2 C .dbd. 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 .dbd. CHCl, to a downstream fluorination reactor charged with the dehydro/chlorofluorination catalyst.

REFERENCES:
patent: 2889379 (1959-06-01), Ruh et al.
patent: 2996555 (1961-08-01), Rausch

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