Patent ID: 8618340
Filing Date: 2013-12-31
Classification: C01B,C07C,Y02P

Abstract:
1. A process for the manufacture of HFO-1234yf from 1,1,2,3-tetrachloropropene (TCP) in three integrated steps comprising; hydrofluorinating TCP in a vapor phase at a first pressure to form an HCFC-1233xf containing effluent comprising HCFC-1233xf and HCl; hydrofluorinating HCFC-1233xf in a liquid phase or a liquid phase followed by vapor phase at a second pressure that is lower than the first pressure to form an HCFC-244bb containing effluent, wherein HCl from the HCFC-1233xf containing effluent is also provided to the hydrofluorination of HCFC-1233xf; and dehydrochlorinating HCFC-244bb in a liquid or vapor phase to produce a HFO-1234yf containing effluent.