| abstract |
The present invention relates to the field of saturated fluorinated hydrocarbons. It relates more particularly to the manufacture of 1-chloro-2,2-difluoroethane from 1,1,2-trichloroethane and / or 1,2-dichloroethylene. The present invention provides a process for producing 1-chloro-2,2-difluoroethane from 1,1,2-trichloroethane and / or 1,2-dichloroethylene comprising (i) at least one step in which 1,1,2-trichloroethane and / or 1,2-dichloroethylene react or react with hydrofluoric acid in the gas phase in the presence of an oxidizing agent, a fluorination catalyst to give a flow comprising 1-chloro-2,2-difluoroethane, hydrochloric acid, hydrofluoric acid and at least one compound (s) C chosen from 1 chloro, 2-fluoroethylenes (cis and trans), 1 , 2-dichloro-2-fluoroethane and optionally unreacted 1,1,2-trichloroethane and / or 1,2-dichloroethylene. |