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    Monitoring of the stoichiometric ratio in the reaction of nitroaromatics with hydrogen
    5.
    发明授权
    Monitoring of the stoichiometric ratio in the reaction of nitroaromatics with hydrogen 有权
    监测硝基芳烃与氢气反应的化学计量比

    公开(公告)号：US08895783B2

    公开(公告)日：2014-11-25

    申请号：US13759466

    申请日：2013-02-05

    申请人： BASF SE

    发明人： Andreas Raichle ,  Stefanie Haase ,  Holgar Braunsberg ,  Johannes Buettner ,  Ulrich Penzel ,  Samuel Neto

    IPC分类号： C07C209/00 ,  C07C209/36

    CPC分类号： C07C209/36 ,  C07C211/47 ,  C07C211/50

    摘要： The present invention relates to a continuous process for preparing at least one aromatic amine by hydrogenation of at least one nitroaromatic by means of hydrogen, where a liquid phase comprising at least the aromatic amine and a gas phase comprising at least hydrogen are present, in the presence of a catalyst suspended in the liquid phase at a temperature of from 50 to 250° C. and a pressure of from 5 to 50 bar, wherein the pressure in the reactor is kept essentially constant by continuous adaptation of the amount of hydrogen fed to the reactor, the total amount of hydrogen fed to the reactor is monitored and the introduction of the at least one nitroaromatic is interrupted if the hydrogen uptake in the reactor is not at least 50 mol % of the amount of hydrogen required for stoichiometric reaction of the at least one nitroaromatic to form the at least one aromatic amine.

    摘要翻译： 本发明涉及通过氢气至少一种硝基芳族化合物来制备至少一种芳族胺的连续方法，其中至少包含芳族胺的液相和至少包含氢的气相存在于 在50至250℃的温度和5至50巴的压力下悬浮在液相中的催化剂的存在，其中反应器中的压力通过连续适应供给到 监测反应器中进料到反应器中的氢气总量，如果反应器中的氢气吸收量不是化学计量反应所需的氢量的至少50摩尔％，则至少一种硝基芳族化合物的引入被中断 至少一种硝基芳族化合物以形成所述至少一种芳族胺。