| abstract |
The invention relates to a process for manufacturing 1,1,1,2-tetrafluoropropene (1234yf, CF 3 -CF═CH 2 ) from 1,1,3,3-tetrachlororopropene (1230za, CCl 2 CH—CHCl 2 ) and/or 1,1,1,3,3-pentachloropropane (240fa, CCl 3 CH 2 CHCl 2 ). The process comprises a step of isomerization of 1,1,3,3-tetrafluoropropene (1230za) to 1,1,2,3-tetrachloropropene (1230xa) followed by conversion of the 1,1,2,3-tetrachloropropene (1230xa) to 1,1,1,2-tetrafluoropropene (1234yf) via a hydrofluorination process. |