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    • 7. 发明授权
    • Catalyst-precursor for the production of maleic acid anhydride and method for the production thereof
    • 用于生产马来酸酐的催化剂前体及其制备方法
    • US07169732B2
    • 2007-01-30
    • US10507610
    • 2003-03-12
    • Jens WeigunySebastian StorckMark DudaCornelia Dobner
    • Jens WeigunySebastian StorckMark DudaCornelia Dobner
    • B01J27/18C07D307/60
    • C07C51/252B01J23/002B01J27/198B01J35/002B01J35/1014B01J37/0018B01J37/031B01J2523/00C07C51/215C07C57/145B01J2523/51B01J2523/55
    • A process for preparing a vanadium, phosphorus, and oxygen catalyst precursor for preparing maleic anhydride by heterogeneously catalyzed gas-phase oxidation of a hydrocarbon having at least four carbon atoms, which comprises (a) reacting vanadium pentoxide with from 102 to 110% strength phosphoric acid in the presence of a primary or secondary, noncyclic or cyclic, unbranched or branched, saturated alcohol having from 3 to 6 carbon atoms in a temperature range from 80 to 160° C.; (b) isolating the precipitate formed; (c) setting an organic carbon content of ≦1.1% by weight in the isolated precipitate by heat treatment in a temperature range from 250 to 350° C., the heat-treated product, following the addition of 3.0% by weight of graphite, giving a powder X-ray diffraction diagram which in the 2θ region features a ratio of the height of the peak of any pyrophosphate phase present at 28.5° to the height of the peak due to the graphite at 26.6° of ≦0.1; and (d) shaping the heat-treated product obtained from step (c) into particles having an averaged diameter of at least 2 mm; a catalyst precursor obtainable from this process; a process for preparing a catalyst from the catalyst precursor; a catalyst obtainable from that process; and also a process for preparing maleic anhydride over that catalyst.
    • 一种制备用于通过异构催化气相氧化具有至少四个碳原子的烃来制备马来酸酐的钒,磷和氧催化剂前体的方法,其包括(a)使五氧化二钒与102-110%强度的磷酸 在80至160℃的温度范围内在具有3至6个碳原子的伯或仲,非环或环状,无支链或支链的饱和醇存在下进行酸反应。 (b)分离形成的沉淀物; (c)通过在250-350℃的温度范围内通过热处理将分离的沉淀物中的有机碳含量<= 1.1重量%设定为热处理产物,添加3.0重量%的石墨 ,给出粉末X射线衍射图,其在2θ区域的特征是存在于28.5°的任何焦磷酸盐相的峰的高度与由于石灰在26.6°<= 0.1处的峰的高度之比; 和(d)将由步骤(c)获得的热处理产物成型为具有至少2mm的平均直径的颗粒; 从该方法获得的催化剂前体; 从催化剂前体制备催化剂的方法; 可从该方法获得的催化剂; 以及在该催化剂上制备马来酸酐的方法。