The preparation method of fluorinated compound

The preparation method of fluorinated compound

CN
  • CN 101,962,314 A
  • Filed: 07/23/2010
  • Published: 02/02/2011
  • Est. Priority Date: 07/23/2009
  • Status: Active Application
First Claim
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1. 2,3,3, the preparation method of 3-tetrafluoro-1-propylene, this method comprises the following steps:

  • (i) in reactor, in the presence of the hydrogen of catalyzer and superstoichiometric amount, R 1216 is carried out gas phase hydrogenation to produce 1,1,1,2,3, the 3-HFC-236fa;

    (ii) in the presence of Dehydrofluorination catalyst or make the mixture of water and potassium hydroxide, make obtain in the previous step 1,1,1,2,3,3-HFC-236fa dehydrofluorination is to produce 1,2,3,3,3-five fluoro-1-propylene;

    (iii) in reactor, in the presence of the hydrogen of catalyzer and superstoichiometric amount, to obtain in the previous step 1,2,3,3,3-five fluoro-1-propylene carry out gas phase hydrogenation to produce 1,1,1,2, the 3-pentafluoropropane;

    (iv) to obtain in the previous step 1,1,1,2, the 3-pentafluoropropane carries out purifying;

    (v) in the presence of Dehydrofluorination catalyst or make the mixture of water and potassium hydroxide, make purifiedly 1,1,1,2,3-pentafluoropropane dehydrofluorination is to produce 2,3,3,3-tetrafluoro-1-propylene;

    (vi) to obtain in the previous step 2,3,3,3-tetrafluoro-1-propylene carries out purifying.

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