Zn and/or Ga promoted multi-metal oxide catalyst

{
  "publication_number": "US6589907B2",
  "country": "US",
  "kind": "B2",
  "title": "Zn and/or Ga promoted multi-metal oxide catalyst",
  "abstract": "A catalyst comprising a promoted mixed metal oxide is useful for the vapor phase oxidation of an alkane or a mixture of an alkane and an alkene to an unsaturated carboxylic acid and for the vapor phase ammoxidation of an alkane or a mixture of an alkane and an alkene to an unsaturated nitrile.",
  "claims": [
    "1. A catalyst comprising a promoted mixed metal oxide having the empirical formula A a M b N c X d Zn e O g wherein A is at least one element selected from the group consisting of Mo and W, M is at least one element selected from the group consisting of V and Ce, N is at least one element selected from the group consisting of Te, Sb and Se, and X is at least one element selected from the group consisting of Nb, Ta, Ti, Al, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ni, Pt, Sb, Bi, B, In, As, Ge, Sn, Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Hf, Pb, P, Pm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu; and wherein, when a=1, b=0.01 to 1.0, c=0.01 to 1.0, d=0.01 to 1.0, e=0.001 to 0.1 and g is dependent on the oxidation state of the other elements.",
    "2. The catalyst of claim 1 in which, when a=1, b=0.1 to 0.5, c=0.05 to 0.5, d=0.01 to 0.5, e=0.02 to 0.08.",
    "3. The catalyst of claim 2 in which A is Mo, N is Te, M is V and X is Nb.",
    "4. A catalyst comprising a promoted mixed metal oxide having the empirical formula Mo a V b Te c Nb d Zn e Ga f O g wherein, when a=1, b=0.01 to 1.0, c=0.01 to 1.0, d=0.01 to 1.0, e=0 or 0.001 to 0.1, f=0 or 0.001 to 0.1 and g is dependent on the oxidation state of the other elements, with the proviso that e and f cannot simultaneously be 0.",
    "5. The catalyst of claim 4 in which, when a=1, b=0.15 to 0.45, c=0.05 to 0.45, d=0.01 to 0.1, e=0.002 to 0.01 and f=0.002 to 0.01.",
    "6. The catalyst of claim 4 in which f is 0."
  ],
  "description_excerpt": "The present invention relates to an improved catalyst for the oxidation of alkanes or a mixture of alkanes and alkenes to their corresponding unsaturated carboxylic acids by vapor phase catalytic oxidation; to a method of making the catalyst; and to a process for the vapor phase catalytic oxidation of alkanes or a mixture of alkanes and alkenes to their corresponding unsaturated carboxylic acids.\n\nThe present invention also relates to a method of producing unsaturated nitrites by subjecting alkanes or a mixture of alkanes and alkenes to vapor phase catalytic oxidation in the presence of ammonia.\n\nNitriles, such as acrylonitrile and methacrylonitrile, have been industrially produced as important intermediates for the preparation of fibers, synthetic resins, synthetic rubbers, and the like. The most popular method for producing such nitrites is to subject an olefin such as propene or isobutene to a catalytic reaction with ammonia and oxygen in the presence of a catalyst in a gaseous phase at a high temperature. Known catalysts for conducting this reaction include a Mo - Bi - P - O catalyst, a V - Sb - O catalyst, an Sb - U - V - Ni - O catalyst, a Sb - Sn - O catalyst, a V - Sb - W - P - O catalyst and a catalyst obtained by mechanically mixing a V - Sb - W - O oxide and a Bi - Ce - Mo - W - O oxide.",
  "cpc": [
    "B01J 23/002",
    "B01J 23/06",
    "B01J 23/08",
    "B01J 23/28",
    "B01J 23/54",
    "B01J 23/64",
    "B01J 23/76",
    "B01J 2523/00",
    "B01J 27/0576",
    "C07C 253/24",
    "C07C 51/215",
    "C07C 51/252",
    "Y02P 20/52"
  ],
  "ipc": [
    "B01J 23/00",
    "B01J 23/06",
    "B01J 23/08",
    "B01J 23/16",
    "B01J 23/28",
    "B01J 23/54",
    "B01J 23/64",
    "B01J 23/76",
    "B01J 27/057",
    "B01J 37/04",
    "B01J 37/08",
    "C01B 19/00",
    "C01G 15/00",
    "C07B 61/00",
    "C07C 253/18",
    "C07C 253/24",
    "C07C 253/26",
    "C07C 255/08",
    "C07C 51/16",
    "C07C 51/21",
    "C07C 51/215",
    "C07C 51/25",
    "C07C 57/05"
  ],
  "assignees": [
    "Rohm and Haas Co"
  ],
  "inventors": [
    "Sanjay Chaturvedi",
    "Anne Mae Gaffney",
    "Scott Han",
    "Dominique Hung Nhu Le"
  ],
  "filing_date": "2001-08-10",
  "publication_date": "2003-07-08",
  "grant_date": "2003-07-08",
  "priority_date": "2000-09-28",
  "application_number": "US-92801901-A",
  "family_id": "27398777",
  "cited_by_count": 36,
  "citations": [
    "US5281745A",
    "US5380933A",
    "EP0630879A1",
    "JPH0753448A",
    "US6063728A",
    "US5907052A",
    "EP0962253A2",
    "JP2000037623A",
    "WO2000009260A1",
    "WO2000029106A1",
    "US6114278A",
    "US6043185A"
  ]
}