Process for the preparation of 1,1,1-Trifluoro-2-chloroethane

Details Process for the preparation of 1,1,1-Trifluoro-2-chloroethane Process for the preparation of 1,1,1-Trifluoro-2-chloroethane

1992-03-02

1992-10-20

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

C07C 1708

Patent

active

051571722

ABSTRACT:
The invention relates to a process for the preparation of 1,1,1-trifluoro-2-chloroethane from trichloroethene and hydrogen fluoride in the gas phase. In this process a catalyst containing chromium and magnesium is used, which catalyst is obtainable by precipitating chromium(III) hydroxide by reacting 1 mole of a water-soluble chromium(III) salt with at least 1.5 mol of magnesium hydroxide or magnesium oxide in the presence of water, converting the reaction mixture into a paste containing chromium hydroxide and a magnesium salt and then drying the paste and treating it at temperatures of 20.degree. to 500.degree. C. with hydrogen fluoride.

REFERENCES:
patent: 2885427 (1959-05-01), Ruh et al.
patent: 3755477 (1973-08-01), Firth et al.
patent: 4547483 (1985-10-01), Muller et al.

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