Processes for synthesis of 1,3,3,3-tetrafluoropropene

Details Processes for synthesis of 1,3,3,3-tetrafluoropropene Processes for synthesis of 1,3,3,3-tetrafluoropropene

2005-04-29

2008-05-13

Eyler, Yvonne (Department: 1621)

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

Organic compounds

Halogen containing

C570S135000, C570S171000, C570S172000

Reexamination Certificate

active

07371904

ABSTRACT:
Disclosed is a process for the synthesis of 1,3,3,3-tetrafluoropropene which comprises, in one embodiment, reacting a compound of CF3X1with a compound of CX2H═CHX3, wherein X1, X2, and X3are each independently selected from the group consisting of fluorine, chlorine, bromine and iodine, to produce a reaction product comprising a compound of CF3CH═CHX3, wherein X3is as described above; and when X3is not fluorine, fluorinating the compound to produce 1,3,3,3-tetrafluoropropene. The process in another embodiment comprises preparing tetrafluoropropene comprising thermally cracking one or more compounds capable of producing a reaction mixture which preferably comprises diflurocarbene radicals and vinylidene fluoride, and converting said reaction mixture into—tetrafluoropropene (1,3,3,3-tetrafluoropropene).

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