Modified catalysts and process

Modified catalysts and process

  • CN 1,830,556 B
  • Filed: 03/09/2005
  • Issued: 10/23/2013
  • Est. Priority Date: 03/10/2004
  • Status: Active Grant
First Claim
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1. the catalyst of modification comprises:

  • use to be selected from following a kind of one or more prepared metal oxide catalysts of processing change in a)-e);

    A) chemical treatment is processed with the reducing agent that comprises pyridine;

    B) chemical treatment is processed with oxalic acid and methyl alcohol;

    C) physical treatment and chemical treatment combine, and it is by freeze grinding, subsequently with containing C 1-C 4The organic solvent of alcohol carries out Soxhlet extractron;

    D) physical treatment and chemical treatment combine, and it extracts with oxalic acid and methyl alcohol subsequently by freeze grinding;

    WithE) physical treatment, it makes catalyst densified or pass through freeze grinding by pressure compression;

    Wherein, the catalyst of described modification comprises the mixed metal oxide catalyst of one or more modifications with following empirical formula;

    M eMoV aNb bX cZ dO nM wherein eBe at least a chemical modifier, this chemical modifier comprises and is selected from hydrogen peroxide, nitrogen, nitric acid, nitrogen monoxide, nitrogen dioxide, nitrogen trioxide, the oxidant of persulfate;

    Be selected from amine, pyridine, hydrazine, quinoline, metal hydride, sodium borohydride, C 1-C 4Alcohol, methyl alcohol, ethanol, sulphite, thiosulfite, the reducing agent of amineothiot;

    The bond of Oxidizing and Reducing Agents;

    Be selected from HCl, HNO 3, H 2SO 4Acid;

    Organic acid, organic diacid, acetic acid, oxalic acid, C 1-C 4Pure and mild C 1-C 4The organic acid bond, oxalic acid and methyl alcohol;

    Be selected from NH 3, NH 4OH, H 2NNH 2, HONH 2, NaOH, Ca (OH) 2, CaO, Na 2CO 3, NaHCO 3Inorganic base;

    Be selected from monoethanolamine, diethanol amine, the organic base of triethanolamine;

    PH adjusting agent;

    Be selected from inorganic peroxide, H 2O 2, organic peroxide, tBu 2O 2Peroxide;

    Chelating agent, ethylenediamine, ethylenediamine tetra-acetic acid;

    Electrolysis comprises electroreduction;

    Utilization comprises the processing of the high-energy radiation of ultraviolet and X-radiation;

    With their combination;

    X is at least a element that is selected from Te and Sb, and Z is selected from W, Cr, Ta, Ti, Zr, Hf, Mn, Re, Fe, Ru, Co, Rh, Ni, Pd, Pt, Ag, Zn, B, Al, Ga, In, Ge, Sn, Pb, P, Bi, Y, at least a element in rare earth element and the alkaline earth element, 0.1≤

    a≤

    1.0,0.01≤

    b≤

    1.0,0.01≤

    c≤

    1.0,0≤

    d≤

    1.0 and n, e determine by the oxidation state of other element, and The catalyst of wherein said modification is compared the one or more differences that demonstrate in chemistry, physics, structural behaviour and their combination with the catalyst of unmodified preparation.

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