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

1977-12-07

1978-08-29

Davis, C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2606535, 2606537, 260654H, C07C 1720

Patent

active

041104080

ABSTRACT:
Isobutylene is catalytically converted to 1-chloro-2-trifluoromethyl-3,3,3-trifluoropropene [(CF.sub.3).sub.2 C .dbd. CHCl]in a chlorofluorination reaction zone by passing a mixture of anhydrous hydrogen fluoride, chlorine and the isobutylene over a chromium oxide or metal fluoride chlorofluorination catalyst. Alternatively, the isobutylene 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 chlorofluorination catalyst.

REFERENCES:
patent: 2889379 (1959-06-01), Ruh et al.
patent: 2996555 (1961-08-01), Rausch
patent: 3183276 (1965-05-01), Vecchio
patent: 3787331 (1974-01-01), Groppelli et al.

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