Patent ID: 9624145
Date: 2017-04-18
CPC Classifications: B01J,C07C

Claim:
1. A process for producing 2,3,3,3-tetrafluoropropene (1234yf) comprising: introducing 1,1,1,2,3-pentachloropropane (240db) and/or 1,1,2,2,3-pentachloropropane (240aa), HF, 1,1,1,2,2-pentafluoropropane (245cb) and 2-chloro-3,3,3-trifluoropropene (1233xf) into a gas phase fluorination reactor containing a fluorination catalyst, wherein the 245cb introduced to the reactor is provided from a recycle loop, and producing 1234yf and 1233xf in the reactor, wherein 1234yf and the recycled 245cb form an equilibrium in the reactor thus resulting in increased production of 1234yf and a constant rate of 245cb in the recycle loop.