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    • 6. 发明授权
    • Process for producing pyromellitic anhydride
    • 制备均苯四酸酐的方法
    • US06452021B1
    • 2002-09-17
    • US09963402
    • 2001-09-27
    • Tsukasa TakahashiYasuhisa EmotoEtsushige Matsunami
    • Tsukasa TakahashiYasuhisa EmotoEtsushige Matsunami
    • C07D30777
    • C07C51/235C07C63/307
    • The present invention has for its object to provide a production method of pyromellitic anhydride of high purity in good yield at low cost by catalytic gas-phase oxidation of a 2,4,5-trialkylbenzaldehyde with the aid of a suitable catalyst system. The present invention relates to a production method of pyromellitic anhydride comprising a step for catalytic gas-phase oxidation of a 2,4,5-trialkylbenzaldehyde with a molecular oxygen-containing gas in which said step for catalytic gas-phase oxidation is carried out in the presence of a catalyst such that a specific surface area of the catalytic active component thereof is not greater than 50 m2/g or in the presence of a catalyst containing vanadium as well as molybdenum and/or tungsten as a catalytic active component.
    • 本发明的目的是通过合适的催化剂体系,通过2,4,5-三烷基苯甲醛的催化气相氧化,以低成本提供高纯度的均苯四酸酐的制备方法。 本发明涉及1,2,4,5-苯四酸酐的制备方法,其包括用含有分子氧的气体催化气相氧化2,4,5-三烷基苯甲醛的步骤,其中所述催化气相氧化步骤在存在下进行 的催化剂,使得其催化活性组分的比表面积不大于50m 2 / g,或者在含有钒的催化剂以及钼和/或钨作为催化活性组分的存在下。
    • 7. 发明授权
    • Process for producing pyromellitic anhydride
    • 制备均苯四酸酐的方法
    • US06699999B2
    • 2004-03-02
    • US10213083
    • 2002-08-07
    • Tsukasa TakahashiHiroyuki UharaKazuo AnyoujiEtsushige Matsunami
    • Tsukasa TakahashiHiroyuki UharaKazuo AnyoujiEtsushige Matsunami
    • C07D49302
    • C07D403/04
    • The present invention has for its object to provide a production method of a pyromellitic anhydride which is not only conducive to an increased catalyst life and, hence, an enhanced operating rate of a plant (reduced downtime) and a reduction in catalyst cost but also conducive to reductions in byproducts and, hence, savings in the cost of after-treatments such as collection and purification. A production method of a pyromellitic anhydride comprising a step for catalytic gas-phase oxidation of a starting mixture gas consisting of a tetraalkylbenzene and/or a trialkylbenzaldehyde and a molecular oxygen-containing gas in a fixed-bed type reactor having a catalyst bed wherein the production method of a pyromellitic anhydride is carried out under the condition that the moisture content of said starting mixture gas to be introduced into the catalyst bed is not more than 2 volume %.
    • 本发明的目的是提供一种均苯四酸酐的制备方法,其不仅有助于提高催化剂寿命,并因此提高设备的运行速度(减少停机时间)和降低催化剂成本,而且有利于 降低副产物,从而节省诸如收集和纯化的后处理成本。一种均苯四酸酐的制备方法,包括用于催化气相氧化起始混合气体的步骤,由四烷基苯和/或 在具有催化剂床的固定床式反应器中的三烷基苯甲醛和含分子氧气体中,其中在所述引入催化剂床的所述起始混合气体的水分含量为 不超过2卷%。
    • 8. 发明授权
    • Vanadium-containing catalysts, process for manufacturing and use of the
same
    • 含钒催化剂,其制造及使用方法
    • US5877330A
    • 1999-03-02
    • US776543
    • 1997-01-29
    • Nobuji KishimotoEtsushige Matsunami
    • Nobuji KishimotoEtsushige Matsunami
    • B01J23/22C07C5/48C07C45/36C07C67/40C07C253/24C07D307/77
    • C07C253/24B01J23/22C07C45/36C07C5/48C07C67/40Y02P20/52
    • Vanadium-containing catalysts are obtained by using polyvanadic acid as a source of vanadium. Vanadium-containing catalysts are obtained by mixing catalyst components other than vanadium, or their precursors, with a polyvanadic acid sol which is formed by ion-exchanging a metavanadic acid aqueous solution with a proton-type cation-exchange resin and performing polycondensation, and by drying and/or calcining the mixture. Such vanadium-containing catalysts can fully exhibit their catalytic activity under mild reaction conditions, and can be suitably used for various reactions, such as synthesis of phthalic anhydride by the partial oxidation of o-xylene, synthesis of benzaldehyde by the partial oxidation of toluene, synthesis of benzoic acid by the partial oxidation of toluene, synthesis of anisaldehyde by the partial oxidation of p-methoxy toluene, synthesis of propylene by the oxidative dehydrogenation of propane, synthesis of isobutene by the oxidative dehydrogenation of isobutane, synthesis of methyl formate by the oxidative dehydrogenation of methanol, and synthesis of acrylonitrile by the ammoxidation of propane.
    • PCT No.PCT / JP96 / 01547 Sec。 371日期1997年1月29日 102(e)1997年1月29日PCT PCT 1996年6月7日PCT公布。 公开号WO96 / 41678 日期:1996年12月27日使用聚钒酸作为钒源可得到含钒催化剂。 含钒催化剂通过将除钒以外的催化剂组分或其前体与通过与质子型阳离子交换树脂离子交换偏钒酸水溶液并进行缩聚而形成的聚阴离子溶胶获得,并进行缩聚 干燥和/或煅烧该混合物。 这种含钒催化剂可以在温和的反应条件下充分发挥其催化活性,适用于各种反应,如通过邻二甲苯的部分氧化合成邻苯二甲酸酐,通过甲苯的部分氧化合成苯甲醛, 通过甲苯的部分氧化合成苯甲酸,通过对甲氧基甲苯的部分氧化合成茴香醛,通过丙烷的氧化脱氢合成丙烯,通过异丁烷的氧化脱氢合成异丁烯,通过甲酸甲酯合成甲酸甲酯 甲醇的氧化脱氢,丙烷的氨氧化合成丙烯腈。