Process for preparing pentafluoroethane

Details Process for preparing pentafluoroethane Process for preparing pentafluoroethane

C - Chemistry, Metallurgy

07

C

C07C 19/08 (2006.01) B01J 23/26 (2006.01) B01J 27/125 (2006.01) B01J 27/132 (2006.01) C07C 17/20 (2006.01) C07C 17/37 (2006.01)

Patent

CA 2191498

Process for preparing pentafluoroethane (125) containing amounts of 115 lower than 0.02% by weight wherein pentafluoroethane is obtained by a dismutation process of tetrafluorochloroethane CF3CHClF (HCFC-124) in gaseous phase in the presence of a chrome oxide catalyst (CR2O3) supported on a AlF3 support, wherein one operates at temperatures from 140-180°C for contact times comprised between 15-30 seconds, from >180°C to 240°C for contact times between 5 to 15 seconds, from >240°C to 250°C for contact times between 1 to seconds, from >260° to 300°C for contact times between 0.1 to 1 second.

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