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    Modification of the catalytic system in an industrial process for making acetic and/or methyl acetate acid
    1.
    发明授权
    Modification of the catalytic system in an industrial process for making acetic and/or methyl acetate acid 失效
    在制造乙酸和/或乙酸甲酯的工业过程中改性催化体系

    公开(公告)号：US07009070B2

    公开(公告)日：2006-03-07

    申请号：US10433474

    申请日：2002-02-05

    申请人： Daniel Thiebaut ,  Daniel Marchand ,  Philippe Kalck ,  Carole Le Berre ,  Philippe Serp

    发明人： Daniel Thiebaut ,  Daniel Marchand ,  Philippe Kalck ,  Carole Le Berre ,  Philippe Serp

    IPC分类号： C07C67/36 ,  C07C53/08

    CPC分类号： C07C67/36 ,  C07C51/10 ,  C07C51/12 ,  C07C67/37 ,  Y02P20/582 ,  C07C53/08 ,  C07C69/14

    摘要： The invention relates to a continuous process for the manufacture of acetic acid and/or methyl acetate, characterized in that, during the continuous operation of the installation for a continuous industrial process, called the initial process, for the carbonylation of methanol or a carbonylatable derivative of methanol such as dimethyl ether, methyl halides or methyl acetate, in the homogeneous liquid phase and under carbon monoxide pressure, in the presence of a catalyst system comprising a rhodium-based homogeneous catalyst and a halogenated promoter, and in the presence of a concentration of water greater than or equal to 14% in the reaction medium, the composition of said homogeneous catalyst is modified gradually by adding an iridium compound over time.This process makes it possible on the one hand to modify the composition of the catalyst system so as to change from a homogeneous catalyst based on rhodium alone to a catalyst based on rhodium and iridium, or even iridium alone, without stopping the installation, and on the other hand to reduce the water content of the reaction medium once the iridium additions have been effected.

    摘要翻译： 本发明涉及一种用于制造乙酸和/或乙酸甲酯的连续方法，其特征在于，在用于连续工业过程的连续操作（称为初始方法）中，用于羰基化甲醇或可羰基化衍生物 在均相液相和一氧化碳压力下，在包含铑基均相催化剂和卤化助催化剂的催化剂体系存在下，在浓度为1的存在下，在甲醇，甲基卤化物或乙酸甲酯中， 的水在反应介质中大于或等于14％，通过随时间加入铱化合物逐渐改变所述均相催化剂的组成。 该方法可以一方面改变催化剂体系的组成，从而将基于单独的铑的均相催化剂改变为仅基于铑和铱的催化剂，或者甚至不停止安装，并且在 另一方面，一旦实施了铱添加，就降低了反应介质的含水量。