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    Process for Simultaneously Preparing 4,4'- Diphenylmethanediamine and Diphenylmethane Diisocyanate and Polyphenylenepolymethylene Polyisocyanates
    9.
    发明申请
    Process for Simultaneously Preparing 4,4'- Diphenylmethanediamine and Diphenylmethane Diisocyanate and Polyphenylenepolymethylene Polyisocyanates 有权
    同时制备4,4'-二苯基甲二胺和二苯甲烷二异氰酸酯和多亚苯基聚亚甲基多异氰酸酯的方法

    公开(公告)号：US20090005596A1

    公开(公告)日：2009-01-01

    申请号：US12160163

    申请日：2007-01-12

    申请人： Michael Bock ,  Hans-Jurgen Pallasch ,  Filip Deberdt ,  Johnny Moors

    发明人： Michael Bock ,  Hans-Jurgen Pallasch ,  Filip Deberdt ,  Johnny Moors

    IPC分类号： C07C211/09

    CPC分类号： C07C209/78 ,  C07C209/84 ,  C07C263/10 ,  C07C211/50 ,  C07C265/12

    摘要： The invention provides aprocess for the simultaneous preparation of 4,4′-diphenylmethanediamine and also diphenylmethane diisocyanate and polyphenylenepolymethylene polyisocyanates, which comprises the steps a) preparation of a mixture of diphenylmethanediamine and polyphenylenepolymethylenepolyamines by acid condensation of aniline and formaldehyde and sub-sequent work-up of the mixture, b) splitting-off of part of the mixture prepared in step a), c) distillation of the mixture separated off in step b) in a column, d) recirculation of the bottom product from step c) to the end product from step a) and condensation of the overhead product from step c), e) distillation of the overhead product from step c) in a column, f) recirculation of the overhead product from step e) to the end product from step a), g) isolation of the 4,4′-diphenylmethanediamine obtained as bottom product in step e), h) reaction of the mixture from step a) with phosgene and subsequent work-up of the reaction product.

    摘要翻译： 本发明提供了同时制备4,4'-二苯基甲烷二胺以及二苯基甲烷二异氰酸酯和聚亚苯基多亚甲基多异氰酸酯的方法，其包括以下步骤：a）通过苯胺和甲醛的酸缩合制备二苯基甲二胺和聚亚苯基多亚甲基多胺的混合物， - b）分离步骤a）中制备的部分混合物，c）在柱中蒸馏步骤b）中分离出的混合物，d）将底部产物从步骤c）再循环至 来自步骤a）的最终产物和来自步骤c）的塔顶馏出物的缩合，e）将柱子产物从步骤c）中蒸馏出来，f）将塔顶产物从步骤e）再循环到来自步骤 a），g）分离步骤e）中作为底部产物获得的4,4'-二苯基甲烷二胺，h）步骤a）的混合物与光气的反应和随后的反应产物的后处理 ct。