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    Method for starting a gas-phase oxidation reactor
    1.
    发明授权
    Method for starting a gas-phase oxidation reactor 有权
    启动气相氧化反应器的方法

    公开(公告)号：US08492566B2

    公开(公告)日：2013-07-23

    申请号：US12936807

    申请日：2009-04-07

    申请人： Hagen Wilmer ,  Jürgen Zühlke ,  Thomas Lautensack ,  Hans-Martin Allmann ,  Frank Rosowski ,  Cornelia Katharina Dobner

    发明人： Hagen Wilmer ,  Jürgen Zühlke ,  Thomas Lautensack ,  Hans-Martin Allmann ,  Frank Rosowski ,  Cornelia Katharina Dobner

    IPC分类号： C07D307/89

    CPC分类号： C07C51/265 ,  C07D307/89

    摘要： What is described is a process for starting up a gas phase oxidation reactor for oxidation of o-xylene to phthalic anhydride, said reactor comprising at least one catalyst layer and being temperature-controllable by means of a heat carrier medium, wherein a) the catalyst layer is interrupted by a moderator layer which is less catalytically active than the catalyst layer or is catalytically inactive, b) a gas stream is passed through the reactor with an initial loading of o-xylene and at an initial temperature of the heat transfer medium, c) the loading of the gas stream is increased to a target loading and, in parallel, the temperature of the heat transfer medium is lowered to an operating temperature. The introduction of the moderator layer allows the loading to be increased more rapidly and the startup time to be shortened.

    摘要翻译： 描述的是用于启动用于将邻二甲苯氧化成邻苯二甲酸酐的气相氧化反应器的方法，所述反应器包括至少一个催化剂层，并且可通过热载体介质温度控制，其中a）催化剂 层被催化剂层催化活性较低或催化无活性的中间体层中断，b）气流以邻二甲苯的初始负荷和传热介质的初始温度通过反应器， c）将气流的负载增加到目标负载，并且并联地将传热介质的温度降低到工作温度。 调节器层的引入允许加载更快速并且启动时间被缩短。

    MALEIC ANHYDRIDE SYNTHESIS CATALYST PRECURSOR AND PROCESS FOR ITS PREPARATION
    2.
    发明申请
    MALEIC ANHYDRIDE SYNTHESIS CATALYST PRECURSOR AND PROCESS FOR ITS PREPARATION 审中-公开
    马来酸酐合成催化剂前体及其制备方法

    公开(公告)号：US20120149919A1

    公开(公告)日：2012-06-14

    申请号：US13391958

    申请日：2010-08-23

    申请人： Stefan Altwasser ,  Cornelia Katharina Dobner ,  Hagen Wilmer ,  Frank Rosowski

    发明人： Stefan Altwasser ,  Cornelia Katharina Dobner ,  Hagen Wilmer ,  Frank Rosowski

    IPC分类号： B01J27/198 ,  C07D307/60 ,  C01B25/37

    CPC分类号： B01J27/198 ,  B01J23/002 ,  B01J35/002 ,  B01J35/023 ,  B01J35/026 ,  B01J37/0009 ,  B01J37/031 ,  B01J37/08 ,  B01J2523/00 ,  C07C51/215 ,  C07C57/145 ,  B01J2523/51 ,  B01J2523/55

    摘要： A process for preparing a vanadium, phosphorus, and oxygen comprising catalyst precursor for preparing maleic anhydride by heterogeneously catalyzed gas-phase oxidation of a hydrocarbon having at least four carbon atoms, which comprises (a) reacting vanadium pentoxide with 102% to 110% strength phosphoric acid in the presence of isobutanol and optionally of a primary or secondary, noncyclic or cyclic, unbranched or branched, saturated alcohol having 3 to 6 carbon atoms in a temperature range from 80 to 160° C.; (b) isolating the precipitate formed; (c) (i) drying the isolated precipitate down to a residual isobutanol content of less than 5% by weight; (ii) then passing a gas which in addition to one or more inert gases comprises 0.1% to 9% by volume of oxygen through the dried precipitate, directly or after isolation, in the temperature range from 130° C. to 200° C.

    摘要翻译： 一种制备钒，磷和氧的方法，包括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催化剂前体，其包括（a）五氧化二钒与102％至110％的强度 磷酸在异丁醇存在下和任选的在80至160℃的温度范围内具有3至6个碳原子的伯或仲，非环或环状，无支链或支链的饱和醇。 （b）分离形成的沉淀物; （c）（i）将分离的沉淀物干燥至低于5重量％的残余异丁醇含量; （ii）然后在130℃至200℃的温度范围内直接或分离后通过除一种或多种惰性气体外还含有0.1％至9％（体积）氧气的气体。