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Process for producing fluoropropenes

  • US 8,247,624 B2
  • Filed: 09/06/2011
  • Issued: 08/21/2012
  • Est. Priority Date: 10/27/2003
  • Status: Expired due to Term
First Claim
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1. A dehydrohalogenation process for the preparation of fluoropropenes of the formula CF3CY═

  • CXNHp, wherein X and Y are independently hydrogen or a halogen selected from the group consisting of fluorine, chlorine, bromine and iodine; and

    N and P are independently integers equal to 0, 1, or 2, provided that (N+P)=2;

    comprising reacting a halopropane of the formula;


    CF3C(YR1)C(XNHPR2)wherein R1, R2, X and Y are independently hydrogen or a halogen selected from the group consisting of fluorine, chlorine, bromine and iodine, provided that at least one of R1, R2, X and Y is a halogen and there is at least one hydrogen and one halogen on adjacent carbon atoms;

    with a caustic solution of at least one alkali metal or alkaline earth metal hydroxide in a non-aqueous, non-alcohol solvent for said alkali metal or alkaline earth metal hydroxide that is essentially miscible with said halopropane.

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