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    IMPROVED MIXED VANADIUM PHOSPHORUS OXIDE CATALYSTS
    32.
    发明专利
    IMPROVED MIXED VANADIUM PHOSPHORUS OXIDE CATALYSTS 未知

    公开(公告)号：IN160581B

    公开(公告)日：1987-07-18

    申请号：IN51DE1981

    申请日：1981-01-28

    Applicant: STANDARD OIL CO OHIO

    Inventor： MILBERGER ERNEST CARL ,  BREMER NOEL JEROME ,  DRIA DENNIS EDWARD

    IPC: C07D307/60 ,  B01J23/00 ,  B01J23/22 ,  B01J27/18 ,  B01J27/198 ,  C01B25/37 ,  C07B61/00 ,  C07C51/215 ,  B01J11/08

    Abstract: Improved oxidation catalysts containing mixed oxides of vanadium and phosphorus which catalysts are particularly effective in the oxidation of n-butane, n-butenes, 1,3-butadiene or a mixture thereof with molecular oxygen or an oxygen-containing gas in the vapour phase to produce excellent yields of maleic anhydride with very good selectivity, are prepared by a process in which at least one vanadium compound, a substantial portion of which is in the pentavalent state, and at least one phosphorus-containing compound is added to an organic liquid medium capable of reducing at least a portion of the vanadium to a +4 valence state, to form a reaction mixture. Partial reduction of the vanadium is effected in the presence of the phosphorus-containing compound and a highly ordered and uniform mixed vanadium phosphorus oxide-containing catalyst precursor is formed. An oxidation catalyst comprising the mixed oxides of vanadium and phosphorus characterized by an average valence state of vanadium from +3.9 to +4.6, and a phosphorus to vanadium ratio of 1 : 1 to 1.2 : 1, wherein the macrostructure of the catalyst predominantly comprises generally spheroid particles consisting of stacks of integrally associated sheets of catalytic material is also disclosed.

    PROCESS FOR PREPARING IMPROVED MIXED VANADIUM PHOSPHORUS OXIDE CATALYSTS
    36.
    发明专利
    PROCESS FOR PREPARING IMPROVED MIXED VANADIUM PHOSPHORUS OXIDE CATALYSTS 未知

    公开(公告)号：PT72957B

    公开(公告)日：1982-03-26

    申请号：PT7295781

    申请日：1981-04-30

    Applicant: STANDARD OIL CO OHIO

    Inventor： DRIA DENNIS EDWARD ,  MILBERGER ERNEST CARL ,  BREMER NOEL JEROME

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

    Abstract: Improved oxidation catalysts containing mixed oxides of vanadium and phosphorus which catalysts are particularly effective in the oxidation of n-butane, n-butenes, 1,3-butadiene or a mixture thereof with molecular oxygen or an oxygen-containing gas in the vapour phase to produce excellent yields of maleic anhydride with very good selectivity, are prepared by a process in which at least one vanadium compound, a substantial portion of which is in the pentavalent state, and at least one phosphorus-containing compound is added to an organic liquid medium capable of reducing at least a portion of the vanadium to a +4 valence state, to form a reaction mixture. Partial reduction of the vanadium is effected in the presence of the phosphorus-containing compound and a highly ordered and uniform mixed vanadium phosphorus oxide-containing catalyst precursor is formed. An oxidation catalyst comprising the mixed oxides of vanadium and phosphorus characterized by an average valence state of vanadium from +3.9 to +4.6, and a phosphorus to vanadium ratio of 1 : 1 to 1.2 : 1, wherein the macrostructure of the catalyst predominantly comprises generally spheroid particles consisting of stacks of integrally associated sheets of catalytic material is also disclosed.

    PROCESS FOR PREPARING IMPROVED MIXED VANADIUM PHOSPHORUS OXIDE CATALYSTS
    37.
    发明专利
    PROCESS FOR PREPARING IMPROVED MIXED VANADIUM PHOSPHORUS OXIDE CATALYSTS 未知

    公开(公告)号：PT72957A

    公开(公告)日：1981-05-01

    申请号：PT7295781

    申请日：1981-04-30

    Applicant: STANDARD OIL CO OHIO

    Inventor： DRIA DENNIS EDWARD ,  MILBERGER ERNEST CARL ,  BREMER NOEL JEROME

    IPC: C07D307/60 ,  B01J23/00 ,  B01J23/22 ,  B01J27/18 ,  B01J27/198 ,  C01B25/37 ,  C07B61/00 ,  C07C51/215 ,  B01J

    Abstract: Improved oxidation catalysts containing mixed oxides of vanadium and phosphorus which catalysts are particularly effective in the oxidation of n-butane, n-butenes, 1,3-butadiene or a mixture thereof with molecular oxygen or an oxygen-containing gas in the vapour phase to produce excellent yields of maleic anhydride with very good selectivity, are prepared by a process in which at least one vanadium compound, a substantial portion of which is in the pentavalent state, and at least one phosphorus-containing compound is added to an organic liquid medium capable of reducing at least a portion of the vanadium to a +4 valence state, to form a reaction mixture. Partial reduction of the vanadium is effected in the presence of the phosphorus-containing compound and a highly ordered and uniform mixed vanadium phosphorus oxide-containing catalyst precursor is formed. An oxidation catalyst comprising the mixed oxides of vanadium and phosphorus characterized by an average valence state of vanadium from +3.9 to +4.6, and a phosphorus to vanadium ratio of 1 : 1 to 1.2 : 1, wherein the macrostructure of the catalyst predominantly comprises generally spheroid particles consisting of stacks of integrally associated sheets of catalytic material is also disclosed.

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