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

C - Chemistry, Metallurgy

07

C

260/658.2

C07C 17/08 (2006.01) B01J 23/26 (2006.01) C07C 17/21 (2006.01) C07C 19/08 (2006.01)

Patent

CA 2021141

Process for the preparation of 1,1,1-trifluoro-2-chloro-ethane 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 to 500°C with hydrogen fluoride.

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