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    METHOD FOR PURIFYING MIXTURES COMPRISING 4,4'-METHYLENEDIPHENYL DIISOCYANATE
    4.
    发明申请
    METHOD FOR PURIFYING MIXTURES COMPRISING 4,4'-METHYLENEDIPHENYL DIISOCYANATE 有权
    净化包含4,4'-亚甲基二苯基二异氰酸酯的混合物的方法

    公开(公告)号：US20120142960A1

    公开(公告)日：2012-06-07

    申请号：US13296665

    申请日：2011-11-15

    申请人： Michael BOCK ,  Johannes Jacobs ,  Kai Thiele ,  Anne-Kathrin Merten

    发明人： Michael BOCK ,  Johannes Jacobs ,  Kai Thiele ,  Anne-Kathrin Merten

    IPC分类号： C07C263/20

    CPC分类号： C07C263/20 ,  C07C265/14

    摘要： The invention relates to a method for purifying mixtures comprising 4,4′-methylenediphenyl diisocyanate, which comprises purifying by distillation a mixture I comprising 4,4′-methylenediphenyl diisocyanate having a hydrolyzable chlorine content as specified in ASTM D4663-10 of greater than 100 ppm by means of a column K1, wherein the gaseous stream comprising the mixture I is brought into contact in the column K1 with at least one liquid compound A which has the same or higher boiling point than 4,4′-methylenediphenyl diisocyanate and which has a hydrolyzable chlorine content as specified in ASTM D4663-10 of a maximum of 100 ppm, and wherein the gaseous stream O obtained at the top of the column comprises 4,4′-methylenediphenyl diisocyanate has a hydrolyzable chlorine content as specified in ASTM D4663-10 of a maximum of 100 ppm.

    摘要翻译： 本发明涉及一种用于纯化包含4,4'-亚甲基二苯基二异氰酸酯的混合物的方法，其包括通过蒸馏纯化包含如ASTM D4663-10中规定的可水解氯含量的4,4'-亚甲基二苯基二异氰酸酯的混合物I大于100 通过柱K1，其中包含混合物I的气流在柱K1中与至少一种液体化合物A接触，该液体化合物A具有与4,4'-亚甲基二苯基二异氰酸酯相同或更高的沸点， ASTM D4663-10中规定的可水解氯含量最高为100ppm，其中在塔顶获得的气流O包含4,4'-亚甲基二苯基二异氰酸酯，其具有如ASTM D4663- 10最大为100 ppm。

    PROCESS FOR PREPARING MDA VIA THE STAGE OF THE AMINAL
    8.
    发明申请
    PROCESS FOR PREPARING MDA VIA THE STAGE OF THE AMINAL 失效
    通过氨基酸制备MDA的方法

    公开(公告)号：US20120035396A1

    公开(公告)日：2012-02-09

    申请号：US13265271

    申请日：2010-04-19

    申请人： Eckhard Stroefer ,  Kai Thiele ,  Michael Zoellinger ,  Johnny Moors ,  Jon S. Speier

    发明人： Eckhard Stroefer ,  Kai Thiele ,  Michael Zoellinger ,  Johnny Moors ,  Jon S. Speier

    IPC分类号： C07C209/78 ,  C07C211/55

    CPC分类号： C07C209/78 ,  C07C209/62 ,  C07C211/50

    摘要： The invention relates to a process for preparing methylenediphenyldiamine (MDA), comprising the following steps a) to c): a) converting formaldehyde and aniline to aminal b) removing water from the aminal obtained in step a) to establish a water content of 0 to 5% by weight based on the aminal, and c) adding an acidic catalyst to the aminal having a water content of 0 to 5% by weight, which comprises using formaldehyde in step a) in the form of highly concentrated formaldehyde with a CH2O content of >50% by weight and preparing the formaldehyde by oxidative dehydrogenation from methanol.

    摘要翻译： 本发明涉及一种制备亚甲基二苯基二胺（MDA）的方法，包括以下步骤a）至c）：a）将甲醛和苯胺转化成缩醛; b）从步骤a）中获得的阿米尔液中除去水，以确定含水量为0 至5重量％，以及c）向具有0-5重量％水含量的氨基酸中加入酸性催化剂，其包括在步骤a）中使用甲醛以高浓度甲醛与CH 2 O形式 含量> 50重量％，并通过甲醇氧化脱氢制备甲醛。