Catalytic conversion of hydroxypropionic acid or its derivatives to acrylic acid or its derivatives

Catalytic conversion of hydroxypropionic acid or its derivatives to acrylic acid or its derivatives

  • CN 103,781,809 A
  • Filed: 04/11/2013
  • Published: 05/07/2014
  • Est. Priority Date: 04/11/2012
  • Status: Active Application
First Claim
Patent Images

1. prepare a method for vinylformic acid, acrylic acid derivative or their mixture, comprise the stream that comprises hydroxy-propionic acid, hydoxy-propionic acid derivative or their mixture is contacted with catalyzer, described catalyzer comprises:

  • (a) at least one is selected from formula (I), (II) and polycondensation phosphate radical anion (III),[P nO 3n+1] (n+2)-

    I)

    [P nO 3n] n-

    II)

    [P (2m+n)O (5m+3n)] n-

    III)

    Wherein n is at least 2, and m is at least 1;

    And(b) at least two kinds of different positively charged ions,Wherein said catalyzer is electroneutral substantially;

    And further, wherein phosphorus and described at least two kinds of different cationic mol ratios are between approximately 0.7 with approximately between 1.7, thereby make vinylformic acid, acrylic acid derivative or their mixture because described stream contacts with described catalyzer.

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