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    PREPARATION OF VANADIUM PHOSPHORUS CATALYSTS
    2.
    发明专利
    PREPARATION OF VANADIUM PHOSPHORUS CATALYSTS 未知

    公开(公告)号：CA1141742A

    公开(公告)日：1983-02-22

    申请号：CA357608

    申请日：1980-08-05

    Applicant: STANDARD OIL CO OHIO

    Inventor： BREMER NOEL J ,  DRIA DENNIS E

    IPC: C07D307/60 ,  B01J27/18 ,  B01J27/198 ,  C01B25/37 ,  C07B61/00 ,  C07C51/215 ,  C07C51/25 ,  B01J23/22

    Abstract: (5205) IMPROVED PREPARATION OF VANADIUM PHOSPHORUS CATALYSTS The present invention provides a method for the preparation of oxidation catalysts containing mixed oxides of vanadium and phosphorus, which catalysts are particularly effective in the oxidation of n-butane, n-butenes, 1,3butadiene or a mixture thereof with molecular oxygen or an oxygen-containing gas in the vapor phase to produce improved yields of maleic anhydride with good selectivity. A vanadium compound is at least partially solubilized in an organic liquid medium capable of reducing at least a portion of the vanadium to a +4 valence state, and unsolubilized vanadium having a particle size larger than about 0.1 mm diameter is removed from the medium before addition of a phosphoruscontaining compound.

    CATALYST FOR PREPARATION OF MALEIC ANHYDRIDE FROM FOUR-CARBON HYDROCARBONS
    6.
    发明专利
    CATALYST FOR PREPARATION OF MALEIC ANHYDRIDE FROM FOUR-CARBON HYDROCARBONS 未知

    公开(公告)号：CA1122958A

    公开(公告)日：1982-05-04

    申请号：CA352925

    申请日：1980-05-28

    Applicant: STANDARD OIL CO OHIO

    Inventor： SURESH DEV D ,  BREMER NOEL J ,  GRASSELLI ROBERT K

    IPC: B01J21/00 ,  B01J23/00

    Abstract: (4856) PREPARATION OF MALEIC ANHYDRIDE FROM FOUR CARBON HYDROCARBONS Catalyst comprising the combined oxides of vanadium and at least one element selected from the group consisting of boron, niobium, tantalum, antimony, tungsten and chromium have been found to be especially effective in the oxidation of n-butane, n-butenes and butadiene, or a mixture thereof with molecular oxygen in the vapor phase to yield maleic anhydride. The catalysts of the present invention may be further promoted with additional elements to enhance activity, stability and selectivity. The reaction with n-butane gives an especially pure product in good yield and selectivity.

    8.
    发明专利
    未知

    公开(公告)号：DD137931A5

    公开(公告)日：1979-10-03

    申请号：DD20568978

    申请日：1978-05-31

    Applicant: STANDARD OIL CO OHIO

    Inventor： BREMER NOEL J

    IPC: C07D307/60 ,  B01J23/00 ,  B01J23/18 ,  B01J27/198 ,  C01B25/37 ,  C07B61/00 ,  C07C51/215 ,  C07C51/25 ,  C07D307/89

    Abstract: Exceptionally reproducible catalysts comprising vanadium and phosphorus are obtained when an aqueous oxide slurry comprising vanadium, phosphorus and a mineral acid-free, inorganic reducing agent, which is capable of reducing the vanadium in the catalyst to a valence state below +5, is heated at an elevated temperature of at least 120 DEG C. under autogenous pressure so that substantial evaporation of the water in said oxide slurry is prevented. Especially preferred catalysts comprise vanadium, phosphorus, uranium and oxygen. Catalysts prepared in accordance with the invention are especially desirable in the oxidation of n-butane, n-butenes, 1,3-butadiene or mixture thereof.

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