Process for producing 2,3,3,3-tetrafluoropropene

Details Process for producing 2,3,3,3-tetrafluoropropene Process for producing 2,3,3,3-tetrafluoropropene

2011-01-18

2011-01-18

Parsa, Jafar (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

C570S156000, C570S257000

Reexamination Certificate

active

07872161

ABSTRACT:
A process is disclosed for making CF3CF═CH2The process involves (i) contacting CHCl2CF2CF3in a reaction zone in the presence of a catalytically effective amount of a dehydrofluorination catalyst to produce CCl2═CFCF3; (ii) contacting CCl2═CFCF3with H2formed in (i) in a reaction zone in the presence of a catalyst comprising a catalytically effective amount of palladium supported on a support selected from the group consisting of alumina fluorided alumina, aluminum fluoride and mixtures thereof, to produce a product mixture comprising CF3CF═CH2, wherein the mole ratio of H2to CCl2═CFCF3fed to the reaction zone is between about 1:1 and about 4:1 and (iii) recovering CF3CF═CH2from the product mixture formed in (ii).

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