Processes for synthesis of 1,3,3,3-tetrafluoropropene
View Patent ↗Disclosed is a process for the synthesis of 1,3,3,3-tetrafluoropropene which comprises, in one embodiment, reacting a compound of CF 3 X 1 with a compound of CX 2 H═CHX 3 , wherein X 1 , X 2 , and X 3 are each independently selected from the group consisting of fluorine, chlorine, bromine and iodine, to produce a reaction product comprising a compound of CF 3 CH═CHX 3 , wherein X 3 is as described above; and when X 3 is 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).
1. A process for the synthesis of 1,3,3,3 tetrafluoropropene comprising:
a) reacting a compound of the formula (I) CF 3 X 1 with a compound of formula (II) CX 2 H═CHX 3 , wherein X 1 , X 2 , and X 3 are each independently selected from the group consisting of fluorine, chlorine, bromine and iodine, to produce a reaction product comprising a compound of formula (III) CF 3 CH═CHX 3 , wherein X 3 is as described above; and
b) when X 3 in formula (III) is not fluorine, fluorinating the compound of formula (III) to produce 1,3,3,3-tetrafluoropropene.
2. The process of claim 1 wherein said reacting step (a) comprises reacting a compound of formula (I) and a compound of formula (II) in a liquid phase reactor.
3. The process of claim 2 wherein said reactor includes catalyst.
4. The process of claim 1 wherein X 1 is Br, X 2 is Cl and X 3 is F.