Catalyst for production of unsaturated aldehyde and unsaturated carboxylic acid and process for producing the same

Catalyst for production of unsaturated aldehyde and unsaturated carboxylic acid and process for producing the same

  • CN 100,342,968 C
  • Filed: 09/15/2004
  • Issued: 10/17/2007
  • Est. Priority Date: 12/03/2003
  • Status: Active Grant
First Claim
Patent Images

1. one kind is used to produce methacrylaldehyde and acrylic acid composite oxide catalysts, it is the composite oxide catalysts that contains molybdenum, bismuth and iron, be used for making propylene generation gas phase catalytic oxidation reaction with molecular oxygen-containing gas, generate corresponding methacrylaldehyde and acrylic acid, it is characterized in that the highest 0.5 weight % of contained humidity drying loss with following formula (1) expression:

  • Drying loss=(W 2-W 1)/W 2* 100 (1) In the formula, W 1Represent the weight of catalyst when being heated 2 hours for 110 ±

    5 ℃

    , W 2Represent the weight of catalyst before heating, And described catalyst is represented with following formula (2);

    Mo aBi bCo cNi dFe eX fY gZ hQ iSi jO k?????(2) In the formula, X is at least one element among Na, K, Rb, Cs and the Tl, and Y is at least one element among B, P, As and the W, Z is at least one element among Mg, Ca, Zn, Ce and the Sm, and Q is a halogen atom, and a to k represents each atoms of elements ratio, and when a=12,0.5≤

    b≤

    7,0≤

    c≤

    10,0≤

    d≤

    10,1≤

    c+d≤

    10,0.05≤

    e≤

    3,0.0005≤

    f≤

    3,0≤

    g≤

    3,0≤

    h≤

    1,0≤

    i≤

    0.5, and 0≤

    j≤

    40, and k is the numerical value that satisfies the oxidation state of other elements.

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