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    Process for the production of isocyanates
    1.
    发明申请
    Process for the production of isocyanates 有权
    生产异氰酸酯的方法

    公开(公告)号：US20070249859A1

    公开(公告)日：2007-10-25

    申请号：US11409940

    申请日：2006-04-24

    申请人： Matthias Bohm ,  Wolfgang Lorenz ,  Bill Brady ,  Donald Pferdehirt

    发明人： Matthias Bohm ,  Wolfgang Lorenz ,  Bill Brady ,  Donald Pferdehirt

    IPC分类号： C07C263/10

    CPC分类号： C07C263/10 ,  C01B7/0706 ,  C01B7/0731 ,  C07C263/20 ,  C07C265/14

    摘要： Isocyanates are produced by a) reacting at least one amine with phosgene, optionally in the presence of a solvent to produce the corresponding isocyanate and a stream containing hydrogen chloride, phosgene and optionally solvent, low-boiling compounds and inert substances is obtained, b) separating the stream containing hydrogen chloride, phosgene and optionally solvent, low-boiling compounds and inert substances in an at least two-stage sequence of absorption steps that includes (1) at least one isothermal absorption step and (2) at least one adiabatic absorption step, to obtain (i) a hydrogen chloride stream containing phosgene in concentrations of at most 0.5 wt. % (based on the weight of the hydrogen chloride stream) and (ii) a liquid phosgene stream, and c) recycling the liquid phosgene stream (ii) to the reaction of amine with phosgene.

    摘要翻译： 异氰酸酯通过以下方法制备：a）任选地在溶剂存在下使至少一种胺与光气反应以产生相应的异氰酸酯，并且获得含有氯化氢，光气和任选溶剂的低沸点化合物和惰性物质的流，b） 在至少两级的吸收步骤序列中分离含有氯化氢，光气和任选溶剂的低沸点化合物和惰性物质，其包括（1）至少一个等温吸收步骤和（2）至少一个绝热吸收 步骤，以获得（i）含有至多0.5重量％浓度的光气的氯化氢料流。 ％（基于氯化氢流的重量）和（ii）液体光气流，和c）将液体光气流（ii）再循环到胺与光气的反应中。

    Process for the preparation of aromatic amines
    3.
    发明申请
    Process for the preparation of aromatic amines 有权
    芳香胺的制备方法

    公开(公告)号：US20080179176A1

    公开(公告)日：2008-07-31

    申请号：US12001829

    申请日：2007-12-13

    申请人： Bernd Pennemann ,  Bill Brady ,  Rainer Buse

    发明人： Bernd Pennemann ,  Bill Brady ,  Rainer Buse

    IPC分类号： C02F1/04

    CPC分类号： C07C209/36 ,  Y02P20/124 ,  Y10S203/08 ,  Y10S203/11 ,  Y10S203/20 ,  C07C211/50

    摘要： Aromatic amines are produced by catalytic hydrogenation of aromatic nitro compounds. The reaction mixture generated by this hydrogenation is then worked up by distillation in a manner which makes it possible to substantially free the amine of water with increased energy efficiency. Water free of amine and low boilers and the low boiling materials are also obtained.

    摘要翻译： 芳族胺通过芳族硝基化合物的催化氢化产生。 通过该氢化产生的反应混合物然后通过蒸馏来处理，使得可以以增加的能量效率基本上释放水的胺。 也可获得不含胺和低沸点的水和低沸点物质。

    Process for the preparation of toluenediamine
    5.
    发明授权
    Process for the preparation of toluenediamine 有权
    制备甲苯二胺的方法

    公开(公告)号：US07307190B2

    公开(公告)日：2007-12-11

    申请号：US11482404

    申请日：2006-07-07

    申请人： Bernd Pennemann ,  Bill Brady ,  Rainer Buse ,  Gerd Greger

    发明人： Bernd Pennemann ,  Bill Brady ,  Rainer Buse ,  Gerd Greger

    IPC分类号： C07C209/00 ,  C07C249/00

    CPC分类号： C07C209/36

    摘要： Toluenediamine is produced and separated from by-products of the reaction by: a) hydrogenating dinitrotoluene in the presence of a catalyst, b) separating the catalyst, water and optionally solvent from the hydrogenation reaction mixture to give crude toluenediamine, and c) separating by distillation the crude toluenediamine in a separating wall column into at least four product streams P1, P2, P3 and P4. The product stream P1 is a stream containing low boilers. The product stream P2 is a stream containing o-toluenediamine. The product stream P3 is a stream containing m-toluenediamine. The product stream P4 is a stream containing high boilers and m-toluenediamine.

    摘要翻译： 制备甲苯二胺并通过以下方式与反应的副产物分离：a）在催化剂存在下氢化二硝基甲苯，b）从氢化反应混合物中分离催化剂，水和任选的溶剂，得到粗甲苯二胺，和c）通过 将分离壁塔中的粗甲苯二胺蒸馏成至少四种产物流P 1，P 2，P 3和P 4。 产物流P 1是含有低锅炉的物流。 产物流P 2是含有邻甲苯二胺的物流。 产物流P 3是含有间甲苯二胺的物流。 产物流P 4是含有高锅炉和间甲苯二胺的物流。

    Process for the preparation of toluenediamine
    6.
    发明申请
    Process for the preparation of toluenediamine 有权

    公开(公告)号：US20070015940A1

    公开(公告)日：2007-01-18

    申请号：US11482404

    申请日：2006-07-07

    申请人： Bernd Pennemann ,  Bill Brady ,  Rainer Buse ,  Gerd Greger

    发明人： Bernd Pennemann ,  Bill Brady ,  Rainer Buse ,  Gerd Greger

    IPC分类号： C07C209/36

    CPC分类号： C07C209/36

    摘要： Toluenediamine is produced and separated from by-products of the reaction by: a) hydrogenating dinitrotoluene in the presence of a catalyst, b) separating the catalyst, water and optionally solvent from the hydrogenation reaction mixture to give crude toluenediamine, and c) separating by distillation the crude toluenediamine in a separating wall column into at least four product streams P1, P2, P3 and P4. The product stream P1 is a stream containing low boilers. The product stream P2 is a stream containing o-toluenediamine. The product stream P3 is a stream containing m-toluenediamine. The product stream P4 is a stream containing high boilers and m-toluenediamine.