The integrin manufacturing method of HFC anti-form-1 234ZE

The integrin manufacturing method of HFC anti-form-1 234ZE

  • CN 103,483,143 B
  • Filed: 08/23/2007
  • Issued: 01/08/2019
  • Est. Priority Date: 08/24/2006
  • Status: Active Grant
First Claim
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1. a kind of production anti-form-1, the method for 3,3,3- tetrafluoropropenes, comprising:

  • (a) in the first reaction vessel Dehydrofluorination 1,1,1,3,3- pentafluoropropane to obtain containing cis- -1,3,3,3- tetrafluoroThe product of propylene, trans-1,3,3,3-tetrafluoropropene and hydrogen fluoride;

    (b) hydrogen fluoride is recycled from the product of step (a);

    (c) independently of the Dehydrofluorination step (a), fluorine is being selected from 75 DEG C to 250 DEG C of temperature in the second reaction vesselChange Cr2O3And AlF3At least one catalyst in the presence of, will at least partly cis- -1,3,3,3- tetrafluoropropenes are isomerized toTrans-1,3,3,3-tetrafluoropropene;

    With(d) trans-1,3,3,3-tetrafluoropropene is recycled.

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