Patent ID: 8536388

Claim:
A process for preparing 2,3,3,3-tetrafluoropropene (1234yf), the process comprising: (a) converting 1,1,1-trifluoro-2,3-dichloropropane (243 db) to 3,3,3-trifluoro-2-chloro-prop-1-ene (CF 3 CCl═CH 2 , 1233xf) in the presence of a first catalyst in a first reactor; (b) contacting 1233xf with a fluorinating agent in the presence of a second catalyst in a second reactor to produce a compound of formula CF 3 CFXCH 3 , wherein X═Cl or F; and (c) dehydrohalogenating the compound of formula CF 3 CFXCH 3 to produce 1234yf, wherein the first catalyst and second catalyst are selected from catalysts comprising activated carbon, catalysts comprising alumina, catalysts comprising an oxide of a transition metal, Lewis acid metal halide catalysts and mixtures thereof.