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    • 31. 发明授权
    • Method for producing shell catalysts for the catalytic vapor-phase oxidation of aromatic hydrocarbons and catalysts obtained in such a manner
    • 用于生产用于芳烃的催化气相氧化的壳催化剂和以这种方式获得的催化剂的方法
    • US06528683B1
    • 2003-03-04
    • US09701517
    • 2000-11-30
    • Thomas HeidemannFrank RosowskiGerd LindenMichael SeufertGerhard HefelePeter Michael Lorz
    • Thomas HeidemannFrank RosowskiGerd LindenMichael SeufertGerhard HefelePeter Michael Lorz
    • C07C5116
    • B01J37/0232B01J23/22B01J37/0219B01J37/0223C07C51/265Y10T428/31935C07C63/16
    • The invention relates to a method for producing shell catalysts for the catalytic vapor-phase oxidation of aromatic carboxylic acids and/or carboxylic acid anhydrides comprised of a supporting core and of catalytically active metal oxides which are deposited in a shell-shaped manner on said supporting core. The inventive catalysts are obtained by spraying an aqueous active mass suspension, said suspension containing the active metal oxides, at higher temperatures onto the hot supporting material which has a temperature ranging from 50 to 450° C. The aqueous active mass suspension contains 1 to 10 wt. %, with regard to the solid content of the active mass suspension, a binding agent comprised of A) a polymerizate obtained by radical polymerization, containing 5 to 100 wt. % of monomers (a) in the form of ethylenically unsaturated acid anhydrides or ethylenically unsaturated dicarboxylic acids whose carboxyl groups can form an anhydride and containing 0 to 95 wt. % monoethylenically unsaturated monomers (b) with the provision that the monomers (a) and (b) comprise, on average, a maximum of 6 carbon atoms which are not functionalized with groups containing oxygen, and of B) an alkanolamine having at least 2 OH groups, a maximum of 2 nitrogen atoms and a maximum of 8 C-atoms, whereby the weight ratio A:B ranges from 1:0.05 to 1:1.
    • 本发明涉及一种用于制备用于催化气相氧化芳族羧酸和/或羧酸酐的壳催化剂的方法,所述芳族羧酸和/或羧酸酐由支撑芯和催化活性金属氧化物组成,其以壳形方式沉积在所述支撑 核心。 本发明的催化剂是通过将含水活性物质悬浮液(含有活性金属氧化物的悬浮液)在较高温度下喷洒到温度为50-450℃的热支撑材料上而获得的。水性活性悬浮液含有1至10 重量 %,关于活性悬浮液的固体含量,结合剂由A)通过自由基聚合获得的聚合物,其含有5〜100重量% %的烯属不饱和酸酐或烯属不饱和二羧酸形式的单体(a),其羧基可以形成酸酐并含有0至95重量% %单烯属不饱和单体(b),条件是单体(a)和(b)平均包含不含有氧的基团不被官能化的最多6个碳原子,和B)具有至少2个的链烷醇胺 OH基团,最多2个氮原子和最多8个C原子,其中重量比A:B的范围为1:0.05至1:1。
    • 40. 发明授权
    • Method for producing phthalic anhydride
    • 邻苯二甲酸酐的制造方法
    • US06700000B1
    • 2004-03-02
    • US09700452
    • 2000-11-15
    • Thomas HeidemannHerbert Wanjek
    • Thomas HeidemannHerbert Wanjek
    • C07D30789
    • B01J35/0006B01J23/002B01J27/198B01J37/0223B01J2523/00C07D307/89B01J2523/15B01J2523/47B01J2523/51B01J2523/53B01J2523/55
    • Phthalic anhydride is prepared by catalytic gas-phase oxidation of xylene and/or naphthalene by a gas comprising molecular oxygen in a fixed bed at elevated temperature and using at least three coated catalysts arranged in superposed zones, which catalysts have a layer of catalytically active metal oxides applied to a core of support material. In the process described, the catalyst activity rises from zone to zone from the gas inlet end to the gas outlet end and the activity of the catalysts of the individual zones is set such that the least active catalyst comprises a lower amount of active composition and, if desired, additionally more alkali metal selected from the group consisting of potassium, rubidium and cesium as dopant than the catalyst of the next zone and the subsequent even more active catalyst comprises the same amount of active composition and even less alkali metal as dopant or a greater amount of active composition and, if desired, less alkali metal as dopant than the catalyst of the second zone, with further conditions.
    • 邻苯二甲酸酐通过在固定床中在升高的温度下通过包含分子氧的气体二甲苯和/或萘的催化气相氧化制备,并且使用布置在重叠区中的至少三个涂覆的催化剂,该催化剂具有催化活性金属层 施加到支撑材料的芯的氧化物。 在所描述的方法中,催化剂活性从气体入口端到气体出口端从区域上升,并且各个区域的催化剂的活性被设定为使得最低活性催化剂包含较少量的活性组合物, 如果需要,另外还有更多的选自钾,铷和铯作为掺杂剂的碱金属比下一个区域的催化剂和随后的甚至更活泼的催化剂包含相同量的活性组合物,甚至更少的碱金属作为掺杂剂或 更多量的活性组合物和如果需要,具有比第二区域的催化剂更少的碱金属作为掺杂剂,具有进一步的条件。