PROCESS

  • US 20110124930A1
  • Filed: 04/09/2009
  • Published: 05/26/2011
  • Est. Priority Date: 10/03/2006
  • Status: Active Grant
First Claim
Patent Images

1. A process for preparing 2,3,3,3-tetrafluoropropene (1234yf), the process comprising:

  • (a) converting 1,1,1-trifluoro-2,3-dichloropropane (243db) to 3,3,3-trifluoro-2-chloro-prop-1-ene (CF3CCI═

    CH2, 1233xf) in the presence of a first catalyst in a first reactor;

    (b) contacting 1233xf with a fluorinating agent in the presence of a second catalyst in a second reactor to produce a compound of formula CF3CFXCH3, wherein X═

    Cl or F; and

    (c) dehydrohalogenating the compound of formula CF3CFXCH3 to produce 1234yf.

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