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    • 63. 发明申请
    • PREPARATION OF PHTHALIC ANHYDRIDE BY GAS PHASE OXIDATION OF O-XYLENE
    • 气相氧化制备邻苯二甲酸二异氰酸酯
    • US20090198073A1
    • 2009-08-06
    • US12301352
    • 2007-05-18
    • Thomas MackewitzFrank RosowskiAndreas Tenten
    • Thomas MackewitzFrank RosowskiAndreas Tenten
    • C07D317/46
    • C07D307/89C07C51/265C07C63/16
    • A process is described for preparing phthalic anhydride by catalytic gas phase oxidation of o-xylene. In, in a main reactor, a gaseous mixture of o-xylene and an oxygenous gas is passed through at least two reaction zones whose temperature can be controlled independently, and converted to a gaseous intermediate reaction product which comprises unconverted o-xylene, phthalic anhydride underoxidation products and phthalic anhydride, and the intermediate reaction product is introduced into a postreactor, wherein the temperature of the reaction zones in the main reactor is regulated in such a way that the concentration of unconverted o-xylene in the intermediate reaction product is at least 0.5% by weight. The process allows an increase in the overall yield of phthalic anhydride without or without significant deterioration in the product quality.
    • 描述了通过邻二甲苯的催化气相氧化制备邻苯二甲酸酐的方法。 在主反应器中,邻二甲苯和氧气的气态混合物通过至少两个反应区,其温度可独立控制,并转化成气态中间反应产物,其包含未转化的邻二甲苯,邻苯二甲酸酐 未反应产物和邻苯二甲酸酐,并将中间反应产物引入后反应器中,其中主反应器中反应区的温度调节为使中间反应产物中未转化的邻二甲苯的浓度至少为 0.5重量%。 该方法允许邻苯二甲酸酐的总产率提高,而不会产生质量的显着劣化。
    • 67. 发明授权
    • Pump for transporting heat-exchange medium for a multi-tube reactor
    • 用于输送多管反应器的热交换介质的泵
    • US07134848B2
    • 2006-11-14
    • US10479625
    • 2002-06-05
    • Gerhard OlbertTorsten MattkeMatthias KummerThomas RühlFrank Rosowski
    • Gerhard OlbertTorsten MattkeMatthias KummerThomas RühlFrank Rosowski
    • G21C19/04
    • F04D3/00F04D29/406
    • The invention relates to a pump (1) having a pump guide tube (13) for the transport of a heat-exchange medium (6) for a reactor having a bundle of catalyst tubes (2), where the pump (1) has a casing (14) which surrounds the pump guide tube (13), having an aperture (15) in the lower part of the casing (14) via which the heat-exchange medium (6) discharged from the lower region of the reactor by means of the pump (1) flows into the casing (14), flows upward in the region between the inner wall of the casing (14) and the outer wall of the pump guide tube (13), if desired via a heat exchanger (18), flows into the interior of the pump guide tube (13) via an aperture (16) in the upper region of the pump guide tube (13), flows through the pump guide tube (13) from top to bottom and flows via an aperture (17) in the lower region of the pump guide tube (13) into the reactor, into the upper region of the interspace between the catalyst tubes (2).
    • 本发明涉及一种具有泵引导管(13)的泵(1),用于输送用于具有一束催化剂管(2)的反应器的热交换介质(6),其中泵(1)具有 围绕所述泵引导管(13)的壳体(14),在所述壳体(14)的下部具有孔(15),所述热交换介质(6)经由所述开口(15)从所述反应器的下部区域排出, 如果需要,通过热交换器(18)将泵(1)流入壳体(14)中,在壳体(14)的内壁和泵引导管(13)的外壁之间的区域中向上流动 )通过泵引导管(13)的上部区域中的孔(16)流入泵引导管(13)的内部,从上到下流过泵引导管(13),并经由 在泵引导管(13)的下部区域中的孔(17)进入反应器,进入催化剂管(2)之间的间隙的上部区域。