C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/658.2
C07C 17/20 (2006.01) C07C 19/08 (2006.01)
Patent
CA 2016223
PROCESS FOR CONTINUOUS LIQUID PHASE REACTION OF HYDROGEN FLUORIDE AND 1,1,1-TRICHLOROETHANE TO PROVIDE 1,1-DICHLORO-1- FLUOROETHANE AND 1-CHLORO-1,1-DIFLUOROETHANE MIXTURES Abstract of the Disclosure A continuous non-catalytic process for the manufac- ture of 1,1-dichloro-1-fluoroethane/1-chloro-1,1-difluoro- ethane mixtures from 1,1-dichloro-1-fluoroethane is pro- vided. Hydrogen fluoride and 1,1,1-trichloroethane are continuously feed a molar ratio of from about 3.0 to about 5.2 to form a liquid phase hydrofluorination reaction mixture. Vapor phase reaction product is continuously withdrawn from the reaction zone, and hydrogen fluoride is continuously selectively refluxed back to the reaction mixture. 1,1,1-Trichloroethane utilization approaches 100%, with selectiYity for 1,1-dichloro-1-fluoroethane between 15% and 85%, based upon ths amount of 1,1-dichloro- 1-fluoroethane and 1-chloro-1,1-difluoroethane contained in the gaseous reaction product.
Atochem North America Inc.
Borden Ladner Gervais Llp
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