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    • 8. 发明授权
    • Vanadium catalysts prepared with phosphonates
    • 用膦酸盐制备的钒催化剂
    • US4013586A
    • 1977-03-22
    • US598615
    • 1975-07-24
    • Thomas J. DolanRobert S. Mitchell
    • Thomas J. DolanRobert S. Mitchell
    • B01J27/198B01J27/18B01J37/00
    • B01J27/198
    • An improved process was found for preparing a vanadium-containing catalyst wherein a tetravalent vanadium compound is provided from a pentavalent vanadium compound, comprising contacting the pentavalent vanadium compound with a phosphonate. The improved process is exemplified by the preparation of phosphorus-vanadium-oxygen catalysts, and particularly the preparation of phosphorus-vanadium-oxygen catalysts having a phosphorus to vanadium atom ratio of about 1:2 to about 2:1 comprising contacting a vanadium compound with a selected phosphonate, recovering a phosphorus-vanadium-oxygen precursor, and thereafter calcining the precursor to form the catalysts. The compound 1-hydroxy-1,1-ethylidene diphosphonic acid is preferred as the phosphonate.
    • 发现一种改进的制备含钒催化剂的方法,其中四价钒化合物由五价钒化合物提供,包括使五价钒化合物与膦酸酯接触。 通过制备磷 - 钒 - 氧催化剂,特别是磷 - 钒原子比为约1:2至约2:1的磷 - 钒 - 氧催化剂的制备,改进的方法举例包括使钒化合物与 选择的膦酸酯,回收磷 - 钒 - 氧前体,然后煅烧前体以形成催化剂。 作为膦酸盐,优选化合物1-羟基-1,1-亚乙基二膦酸。