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    Method for producing maleic acid anhydride
    4.
    发明授权
    Method for producing maleic acid anhydride 有权
    马来酸酐生产方法

    公开(公告)号：US06803473B2

    公开(公告)日：2004-10-12

    申请号：US10220746

    申请日：2002-09-05

    申请人： Jens Weiguny ,  Sebastian Storck ,  Andreas Tenten ,  Wilhelm Ruppel

    发明人： Jens Weiguny ,  Sebastian Storck ,  Andreas Tenten ,  Wilhelm Ruppel

    IPC分类号： C07D30760

    CPC分类号： B01J8/067 ,  B01J2208/00212 ,  B01J2208/0053 ,  C07C51/215 ,  C07C57/145

    摘要： In a process for preparing maleic anhydride by heterogeneously catalyzed gas-phase oxidation of hydrocarbons having at least four carbon atoms using oxygen-containing gases in the presence of a volatile phosphorus compound over a catalyst comprising vanadium, phosphorus and oxygen in a shell-and-tube reactor unit having at least two successive cooled reaction zones, the temperature of the first reaction zone is from 350 to 450° C. and the temperature of the second and further reaction zones is from 350 to 480° C. and the temperature difference between the hottest reaction zone and the coolest reaction zone is at least 2° C.

    摘要翻译： 在使用含氧气体的挥发性磷化合物存在下，在包含钒，磷和氧的催化剂存在下，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方法， 管式反应器单元具有至少两个连续冷却的反应区，第一反应区的温度为350-450℃，第二反应区和其它反应区的温度为350-480℃，温度差为 最热的反应区和最冷的反应区为至少2℃

    Catalytic gas-phase oxidation of propene to acrolein
    5.
    发明授权
    Catalytic gas-phase oxidation of propene to acrolein 失效
    丙烯催化气相氧化成丙烯醛

    公开(公告)号：US5821390A

    公开(公告)日：1998-10-13

    申请号：US525011

    申请日：1995-09-08

    申请人： Wilhelm Ruppel ,  Ulrike Wegerle ,  Andreas Tenten ,  Ulrich Hammon

    发明人： Wilhelm Ruppel ,  Ulrike Wegerle ,  Andreas Tenten ,  Ulrich Hammon

    IPC分类号： B01J23/88 ,  B01J8/06 ,  B01J21/02 ,  B01J23/16 ,  B01J23/887 ,  B01J27/132 ,  B01J27/192 ,  C07B61/00 ,  C07C45/35 ,  C07C47/22

    CPC分类号： B01J27/192 ,  B01J23/8876 ,  B01J8/067 ,  C07C45/35 ,  B01J2208/00212 ,  B01J2208/00221 ,  B01J2219/00777

    摘要： A gas-phase mixture of propene and oxygen is catalytically oxidized by passing a reactant gas mixture comprising propene and oxygen through a plurality of catalyst containing contact tubes in a fixed bed reactor and simultaneously passing only one heat-exchange medium at elevated temperature over the exterior surfaces of the contact tubes in a longitudinal flow pattern which is cocurrent with the direction of flow of the reactants through said tube; simultaneously superposing a transverse flow on said longitudinal flow of heat exchange medium by means of an arrangement of successive baffles along the contact tubes which leave passage cross-sections free, thereby resulting in a meandrous flow of the heat-exchange medium through the reactor and setting the flow rate of said heat-exchange medium so that its temperature between the point of entry of the medium into the reactor and its point of exit increases by 2.degree. to 10.degree. C.; and obtaining product acrolein at a selectivity .gtoreq.85 mol % from the reactor at a single pass propene conversion .gtoreq.90 mol %.

    摘要翻译： 丙烯和氧气的气相混合物通过在固定床反应器中通过包含丙烯和氧气的反应气体混合物通过多个含有接触管的催化剂催化氧化，同时仅使一个热交换介质在高温下通过外部 接触管的表面以与通过所述管的反应物的流动方向并流的纵向流动图案; 同时通过沿着接触管的连续挡板的布置使横向流在所述纵向流动的热交换介质上，使得通道横截面自由，从而导致热交换介质通过反应器的蜿蜒流动和设定 所述热交换介质的流速使得其进入反应器的入口点和其出口点之间的温度升高2℃至10℃; 并且在单次丙烯转化率为90摩尔％时，以反应器的选择性> 85％摩尔得到产物丙烯醛。

    Catalytic gas-phase oxidation of acrolein to acrylic acid
    6.
    发明授权
    Catalytic gas-phase oxidation of acrolein to acrylic acid 失效
    丙烯醛催化气相氧化成丙烯酸

    公开(公告)号：US5739391A

    公开(公告)日：1998-04-14

    申请号：US525118

    申请日：1995-09-08

    申请人： Wilhelm Ruppel ,  Ulrike Wegerle ,  Andreas Tenten ,  Ulrich Hammon

    发明人： Wilhelm Ruppel ,  Ulrike Wegerle ,  Andreas Tenten ,  Ulrich Hammon

    IPC分类号： B01J23/28 ,  B01J8/06 ,  B01J21/02 ,  B01J23/16 ,  C07B61/00 ,  C07C51/25 ,  C07C57/055 ,  C07C51/16

    CPC分类号： B01J8/067 ,  C07C51/252 ,  B01J2208/00212

    摘要： A process for the catalytic gas-phase oxidation of acrolein to acrylic acid in a multiple contact tube fixed-bed reactor through whose space surrounding the contact tubes only one heat-exchange medium circuit is passed, at elevated temperature on catalytically active multimetal oxides with an acrolein conversion for a single pass of .gtoreq.95 mol % and an acrylic acid formation selectivity of .gtoreq.90 mol %, which comprises firstly passing the heat-exchange medium through the multiple contact tube fixed-bed reactor longitudinally, considered over the reaction container as a whole, to the contact tubes in cocurrent to the reaction-gas mixture and secondly superposing a transverse flow within the reaction container by means of an arrangement of successive baffles along the contact tubes which leaves passage cross sections free, so as to give a meandrous flow of the heat-exchange medium, seen in longitudinal section through the contact tube bundle, and setting the flow rate of the circulated heat-exchange medium so that its temperature rises by from 2.degree. to 10.degree. C. between the point of entry into the reactor and the point of exit out of the reactor.

    摘要翻译： 一种在多接触管固定床反应器中将丙烯醛催化气相氧化成丙烯酸的方法，其中通过其接触管周围的空间仅使一个热交换介质回路在高温下通过催化活性多金属氧化物，其具有 丙烯醛转化率为> / = 95mol％，丙烯酸形成选择性> 90wt％，其包括首先使热交换介质通过多接触管固定床反应器纵向通过 反应容器作为整体，与反应气体混合物并流到接触管，并且其次通过沿接触管的连续挡板的布置叠加在反应容器内的横向流动，使得通道横截面自由，从而 通过接触管束在纵剖面中看到热交换介质的蜿蜒流动，并设定循环hea的流量 t-交换介质，使其在进入反应器的点和从反应器出来的点之间的温度升高2℃至10℃。

    Heterogeneously catalyzed partial gas phase oxidation of propene to acrylic acid
    10.
    发明授权
    Heterogeneously catalyzed partial gas phase oxidation of propene to acrylic acid 有权
    将丙烯非均相催化部分气相氧化成丙烯酸

    公开(公告)号：US07164039B2

    公开(公告)日：2007-01-16

    申请号：US10808282

    申请日：2004-03-25

    申请人： Jochen Petzoldt ,  Martin Dieterle ,  Heiko Arnold ,  Wilhelm Ruppel ,  Klaus Joachim Mueller-Engel

    发明人： Jochen Petzoldt ,  Martin Dieterle ,  Heiko Arnold ,  Wilhelm Ruppel ,  Klaus Joachim Mueller-Engel

    IPC分类号： C07C51/16

    CPC分类号： C07C51/252 ,  C07C57/04

    摘要： In a process for heterogeneously catalyzed partial gas phase oxidation of propene to acrylic acid, the propene-containing starting reaction gas mixture is oxidized in a first reaction stage using a fixed catalyst bed 1 which consists of a plurality of fixed catalyst bed zones and is accommodated in two successive temperature zones A, B, and the acrolein-containing product gas mixture of the first reaction stage is then oxidized in a second reaction stage using a fixed catalyst bed 2 which consists of a plurality of fixed catalyst bed zones and is accommodated in two successive temperature zones C, D, and the transition from one temperature zone to another temperature zone within one reaction stage does not spatially coincide with a transition from one fixed catalyst bed zone to another fixed catalyst bed zone.

    摘要翻译： 在将丙烯非均相催化的部分气相氧化成丙烯酸的方法中，含丙烯的起始反应气体混合物在第一反应阶段中使用由多个固定催化剂床区组成的固定催化剂床1被氧化， 在两个连续的温度区A，B和第一反应阶段的含丙烯醛的产物气体混合物然后在第二反应阶段中使用由多个固定催化剂床区组成的固定催化剂床2进行氧化， 两个连续的温度区域C，D以及在一个反应​​阶段内从一个温度区域到另一个温度区域的过渡在空间上与从一个固定催化剂床区域到另一个固定催化剂床区域的过渡不一致。