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    • 5. 发明授权
    • Oxide catalyst and process for producing maleic anhydride by using oxide
catalyst
    • 氧化物催化剂和使用氧化物催化剂生产马来酸酐的方法
    • US5498731A
    • 1996-03-12
    • US266510
    • 1994-06-27
    • Yasushi TsuritaMasumi ItoKen Shiraga
    • Yasushi TsuritaMasumi ItoKen Shiraga
    • B01J27/198
    • B01J27/198
    • An oxide catalyst for producing maleic anhydride by vapor phase oxidation of a hydrocarbon having 4 carbon atoms, obtainable by (1) reacting a pentavalent vanadium compound and a pentavalent phosphorus compound in an organic solvent in the presence of a reducing agent capable of reducing the pentavalent vanadium to the tetravalent state to produce the crystalline composite oxide particles containing tetravalent vanadium and pentavalent phosphorus, (2) dry-pulverizing the obtained crystalline composite oxide particles in a high-speed gas flow, (3) mixing the pulverized particles with an aqueous solution containing tetravalent vanadium and pentavalent phosphorus to form a slurry, and (4) spray-drying the slurry and then calcining.
    • 一种用于通过气相氧化具有4个碳原子的烃来生产马来酸酐的氧化物催化剂,其可通过以下方式得到:(1)使五价钒化合物和五价磷化合物在有机溶剂中,在还原剂的存在下反应,所述还原剂能够还原五价 钒至四价状态,生成含有四价钒和五价磷的结晶复合氧化物粒子,(2)以高速气流将得到的结晶复合氧化物粒子干粉碎,(3)将粉碎的粒子与水溶液 含有四价钒和五价磷以形成浆料,(4)喷雾干燥浆料,然后煅烧。