Optimized liquid-phase oxidation

Optimized liquid-phase oxidation

  • CN 101,198,578 B
  • Filed: 05/24/2006
  • Issued: 07/16/2014
  • Est. Priority Date: 06/16/2005
  • Status: Active Grant
First Claim
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1. a continuation method, it comprises:

  • (a) p-dimethylbenzene is fed to oxidation reactor;

    (b) in described oxidation reactor, in the liquid phase of contained heterogeneous reaction medium, be oxidized at least a portion of described p-dimethylbenzene, thereby produce crude terephthalic acid, wherein said oxidation produces carbonic acid gas, carbon monoxide and/or methyl acetate;

    AndBetween described oxidation period, the scale dimension of the mole number of the mole number of produced oxycarbide and the p-dimethylbenzene of described charging is held in to approximately 0.02;

    in the 1-scope of approximately 0.24;

    1;

    The impurity that wherein said p-dimethylbenzene charging contains following content;

    The m-dimethylbenzene of 20-800ppmw;

    The ortho-xylene of 10-300ppmw;

    WithEthylbenzene+toluene of 20-700ppmw.

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