Method for Manufacturing 2,3,3,3-Tetrafluoropropene

A process for manufacturing 2,3,3,3-tetrafluoropropene, comprising reacting 2-chloro-3,3,3-trifluoro-1-propene with HF in the gas phase in the presence of a fluorination catalyst in a reaction vessel at a temperature of between 320 and 420° C., wherein a molar ratio of oxygen to 2-chloro-3,3,3-trifluoro-1-propene in the reaction vessel is greater than 1 and less than or equal to 2.5 and a molar ratio of HF to all of the compounds to be reacted is between 5 and 40.

A process for manufacturing 2,3,3,3-tetrafluoropropene comprising reacting 1,1,1,2,3-pentachloropropane with HF in the gas phase in the presence of a catalyst to yield an intermediate stream comprising 2-chloro-3,3,3-trifluoro-1-propene, 2,3,3,3-tetrafluoropropene and, optionally, 1,1,1,2,2-pentafluoropropane;

• separating 2,3,3,3-tetrafluoropropene from the intermediate stream to form a second intermediate stream comprising 2-chloro-3,3,3-trifluoro-1-propene and, optionally, 1,1,1,2,2-pentafluoropropane, and
• reacting the second intermediate stream with HF in the gas phase in the presence of a fluorination catalyst at a temperature of between 320 and 420° C. in a reaction vessel, wherein a molar ratio of oxygen to 2-chloro-3,3,3-trifluoro-1-propene in the reaction vessel is greater than 1 and less than or equal to 2.5 and a molar ratio of HF to all of the compounds to be reacted is between 5 and 40.