Versatile oxidation byproduct purge process

Versatile oxidation byproduct purge process

  • CN 105,237,385 A
  • Filed: 02/27/2007
  • Published: 01/13/2016
  • Est. Priority Date: 03/01/2006
  • Status: Active Application
First Claim
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1. one kind for the treatment of the method for purified feed stream comprising oxidized byproduct and one or more catalyst components, wherein described oxidized byproduct is the by product from aromatic compound moieties oxidation at least partially, wherein said oxidized byproduct comprises phenylformic acid (BA) and non-benzoic by product, wherein said non-benzoic by product comprises m-phthalic acid, phthalic acid, trihemellitic acid, 2, 5, 4 '"'"'-three carboxyl biphenyl, 2, 5, 4 '"'"'-tricarboxybenzophenone, p-toluic acid (p-TAc), 4-carboxyl benzaldehyde (4-CBA), naphthalic acid, ocarboxyfluorenones, mono carboxylic fluorenes, and/or dicarboxyl Fluorenone, described method comprises:

  • A () will be separated into by described purified feed stream at least partiallyThe stream of (i) rich non-phenylformic acid by product;

    With(ii) rich catalyzer and phenylformic acid stream;

    At least 1.5 times of the concentration that the concentration of non-benzoic by product described in the stream of wherein said richness non-phenylformic acid by product is non-benzoic by product described in described purified feed stream, based on weight, in wherein said rich catalyzer and phenylformic acid stream, the cumulative concentration of whole described catalyst component is at least 1.5 times of the cumulative concentration of whole described catalyst component in described purified feed stream, based on weight;

    And in wherein said rich catalyzer and phenylformic acid stream, benzoic concentration is at least 1.5 times of benzoic concentration in described purified feed stream, based on weight;

    WithB () will described rich catalyzer and phenylformic acid stream (ii) be separated into rich catalyst stream and rich phenylformic acid stream at least partially, in wherein said rich catalyst stream, the cumulative concentration of whole described catalyst component is at least 1.5 times of the cumulative concentration of whole described catalyst component in described purified feed stream, based on weight, and in wherein said rich phenylformic acid stream, benzoic concentration is at least 1.5 times of benzoic concentration in described purified feed stream, based on weight;

    It comprises further, by the stream of described rich phenylformic acid stream, at least partially described richness non-phenylformic acid by product at least partially and at least partially described rich catalyst stream deliver to the selected route of at least two different positionss;

    Wherein said different positions comprises TPA production technique, m-phthalic acid (IPA) production technique, phthalic acid (PA) production technique, phenylformic acid production technique, naphthalic acid (NDA) production technique, dimethyl terephthalate (DMT) (DMT) production technique, naphthalene diformic acid dimethyl ester (DMN) production technique, cyclohexanedimethanol (CHDM) production technique, cyclohexanedicarboxylate (DMCD) production technique, cyclohexane dicarboxylic acid (CHDA) production technique, polyethylene terephthalate (PET) production technique, copolyester production technique, adopt TPA, IPA, PA, BA, NDA, DMT, DMN, CHDM, DMCD, or one or more in CHDA are as a kind of component and/or the polymer production process as monomer, and/or described TPA, IPA, PA, BA, NDA, DMT, DMN, CHDM, DMCD, CHDA, or each point outside polymer production process,In the stream of wherein said richness non-phenylformic acid by product, non-benzoic by product is combined with the downstream TPA product of described TPA production technique at least partially.

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