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    • 28. 发明授权
    • High performance VPO catalyst and process of preparation thereof
    • 高性能VPO催化剂及其制备方法
    • US5641722A
    • 1997-06-24
    • US306489
    • 1994-09-15
    • Scott F. MitchellRobert A. KeppelMichael J. Mummey
    • Scott F. MitchellRobert A. KeppelMichael J. Mummey
    • C07D307/60B01J27/198B01J35/00B01J35/10B01J37/00B01J37/08C07B61/00C07C51/21C07C51/215C07C51/25
    • C07C51/252B01J23/002B01J27/198B01J37/0018C07C51/215C07C51/25B01J2523/00B01J35/0026B01J35/1014B01J35/108B01J37/08
    • An activated porous phosphorus/vanadium oxide catalyst adapted for the catalytic oxidation of a hydrocarbon to produce a carboxylic acid anhydride. The catalyst comprises a shaped body having a volume of at least about 0.02 cc, a phosphorus content of between about 1.05 and about 1.20, a B.E.T. surface area of at least about 15 m.sup.2 /g, an average vanadium oxidation state of between about 4.06 and about 4.3, a total pore volume of at least about 0.15 cc/g, a normalized apparent shaped body density of between about 1.0 and about 2.0 g/cc, and a crush strength of at least about 4 pounds. At least about 20% of the pore volume of the catalyst is constituted of pores having a diameter between about 0.1 and about 3.3 .mu.M, and at least about 40% of the pore volume is constituted of pores having a diameter of less than about 0.1 .mu.M. The catalyst is prepared by mixing a particulate phosphorus/vanadium oxide precursor with a pore modification agent to produce a modified catalyst precursor composition, forming the modified precursor composition into a predetermined shape, and removing the pore modification agent substantially at a temperature below 300.degree. C., preferably using air as a stripping gas.
    • 一种活化的多孔磷/氧化钒催化剂,适于催化氧化烃以产生羧酸酐。 催化剂包括具有至少约0.02cc的体积,约1.05至约1.20的磷含量的成形体,B.E.T. 表面积至少约15m 2 / g,平均钒氧化态在约4.06与约4.3之间,总孔体积至少约0.15cc / g,归一化表观体密度在约1.0至约2.0之间 g / cc,压碎强度至少约4磅。 催化剂的孔体积的至少约20%由直径在约0.1至约3.3μm之间的孔构成,并且至少约40%的孔体积由直径小于约0.1的孔构成 通过将颗粒状磷/钒氧化物前体与孔改性剂混合以制备改性催化剂前体组合物,将改性前体组合物形成预定形状并基本上在低于下述温度下除去孔改性剂来制备催化剂 300℃,优选使用空气作为汽提气体。