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    Catalytic gas-phase oxidation of propene to acrolein
    16.
    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

    Applicant: Wilhelm Ruppel ,  Ulrike Wegerle ,  Andreas Tenten ,  Ulrich Hammon

    Inventor： Wilhelm Ruppel ,  Ulrike Wegerle ,  Andreas Tenten ,  Ulrich Hammon

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

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

    Abstract: 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 %.

    Abstract translation: 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
    17.
    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

    Applicant: Wilhelm Ruppel ,  Ulrike Wegerle ,  Andreas Tenten ,  Ulrich Hammon

    Inventor： Wilhelm Ruppel ,  Ulrike Wegerle ,  Andreas Tenten ,  Ulrich Hammon

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

    CPC classification number: B01J8/067 ,  C07C51/252 ,  B01J2208/00212

    Abstract: 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.

    Abstract translation: 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℃。

    Process for the fractional separation of (meth)acrylic acid from a mixture containing (meth)acrylic acid
    18.
    发明授权
    Process for the fractional separation of (meth)acrylic acid from a mixture containing (meth)acrylic acid 失效
    从（甲基）丙烯酸的混合物中分级分离（甲基）丙烯酸的方法

    公开(公告)号：US5637222A

    公开(公告)日：1997-06-10

    申请号：US584302

    申请日：1996-01-11

    Applicant: Holger Herbst ,  Gerhard Nestler ,  Ulrich Hammon

    Inventor： Holger Herbst ,  Gerhard Nestler ,  Ulrich Hammon

    IPC: C07C57/04 ,  C07C51/44 ,  C07C57/05 ,  C07C57/07 ,  B01D61/16

    CPC classification number: C07C51/44

    Abstract: A process for the fractional separation of (meth)acrylic acid from a mixture containing (meth)acrylic acid, in which (meth)acrylic acid is tapped off from the rectifying column at a point above the level at which the liquid mixture containing (meth)acrylic acid enters the rectifying column, and at at least one point of the rectifying column the reflux liquid descending therein is tapped off from the rectifying column, oligomerized and/or polymerized (meth)acrylic acid present therein is separated and the reflux liquid is subsequently recycled to the rectifying column.

    Abstract translation: （甲基）丙烯酸的混合物从（甲基）丙烯酸的混合物中分馏（甲基）丙烯酸的方法，其中（甲基）丙烯酸在高于含有（甲基）丙烯酸的 ）丙烯酸进入精馏塔，并且在精馏塔的至少一个点处，从其中下降的回流液体从精馏塔中分离，其中存在的低聚和/或聚合的（甲基）丙烯酸被分离，回流液为 随后再循环至精馏塔。

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