Process for producing difluoromethane

Details Process for producing difluoromethane Process for producing difluoromethane

C - Chemistry, Metallurgy

07

C

C07C 19/08 (2006.01) B01J 27/12 (2006.01) C07C 17/20 (2006.01)

Patent

CA 2194151

The present invention is directed to a process for producing difluoromethane by fluorinating dichloromethane with hydrogen fluoride in a liquid phase in the presence of a catalyst, wherein the reaction is conducted at a temperature within the range from 80 to 150°C under a pressure within the range from 8 to 80 kg/cm2 using a mixture of antimony pentafluoride and antimony trifluoride, or antimony pentafluoride as the fluorinating catalyst. The difluoromethane can be economically and safely produced from dichloromethane and hydrogen fluoride using this process.

Procédé pour produire économiquement et sans danger du difluorométhane par réaction de dichlorométhane avec du fluorure d'hydrogène en présence d'un catalyseur dans une phase liquide, cette réaction s'effectuant en utilisant comme catalyseur du pentafluorure d'antimoine ou un mélange de celui-ci avec du trifluorure d'antimoine à une température de 80-150 DEG C sous une pression de 8-80 kg/cm<2>.

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