Patent ID: 6103944
Filing Date: 2000-08-15
Classification: B01D,C07C,Y02P,Y10S

Abstract:
In a process comprising:effecting gaseous phase reaction of an organic compound selected from the group consisting of chlorinated alkanes and chlorinated olefines, with a stoichiometric excess of HF in the presence of a fluorination catalyst to produce a gaseous product stream containing a fluorinated organic compound, excess HF and water, the improvement which comprises:(a) contacting the resulting gaseous product stream containing fluorinated organic compound, excess HF and water and having a temperature above the dew point of the HF/water component in said gaseous product stream and in the range of 150.degree. C. to 300.degree. C., with liquid HF to effect mass transfer of water present in the gaseous product stream to said liquid HF and to produce a residual treated gaseous product stream comprising said fluorinated organic compound and HF;(b) separating the HF from the fluorinated organic compound of said residual treated gaseous product stream; and(c) recycling at least part of the separated HF obtained in step (b) to effect said gaseous phase reaction.