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    Production of aromatic diamino compounds using a modified Raney catalyst
    2.
    发明授权
    Production of aromatic diamino compounds using a modified Raney catalyst 失效
    使用改性阮内催化剂生产芳族二氨基化合物

    公开(公告)号：US4792626A

    公开(公告)日：1988-12-20

    申请号：US917449

    申请日：1986-10-10

    申请人： Dieter Becher ,  Udo Birkenstock ,  Eckart Waldau ,  Harro Witt

    发明人： Dieter Becher ,  Udo Birkenstock ,  Eckart Waldau ,  Harro Witt

    IPC分类号： C07B61/00 ,  B01J25/00 ,  B01J25/02 ,  C07C67/00 ,  C07C209/00 ,  C07C209/36 ,  C07C211/50 ,  C07C211/55 ,  C07C85/11

    CPC分类号： B01J25/02 ,  B01J25/00 ,  C07C209/36

    摘要： Aromatic diamino compounds are produced by hydrogenating the corresponding dinitro compounds in the presence of a modified Raney catalyst. The modified Raney catalyst is obtained by treating an alloy made up of 50-95 wt % of aluminum, 4-45 wt % nickel and/or cobalt and 1-46 wt % of at least one modifying metal with an alkali material. The modifying metal is selected from the metals of the first, fourth, fifth, sixth, seventh and eighth subgroups of the Periodic Table of Elements. The hydrogenation is preferably carried out at from 170.degree. to 250.degree. C. and a pressure of 15-50 bar. The heat generated during hydrogenation is preferably used to produce steam.

    摘要翻译： 通过在改性的阮内催化剂的存在下氢化相应的二硝基化合物来制备芳族二氨基化合物。 修饰的阮内催化剂通过用碱材料处理由50-95重量％的铝，4-45重量％的镍和/或钴和1-46重量％的至少一种改性金属组成的合金而获得。 修饰金属选自元素周期表的第一，第四，第五，第六，第七和第八子族的金属。 氢化优选在170-250℃和15-50巴的压力下进行。 在氢化期间产生的热量优选用于产生蒸汽。

    Process for separating sulphuric acid and nitric acid from dinitrotoluene mixtures obtained during the nitration of toluene
    3.
    发明授权
    Process for separating sulphuric acid and nitric acid from dinitrotoluene mixtures obtained during the nitration of toluene 失效
    在甲苯硝化过程中从二硝基甲苯混合物中分离出硫酸和硝酸的方法

    公开(公告)号：US5001286A

    公开(公告)日：1991-03-19

    申请号：US155199

    申请日：1988-02-12

    申请人： Harro Witt ,  Heiko Beckhaus

    发明人： Harro Witt ,  Heiko Beckhaus

    IPC分类号： C07C67/00 ,  C07C201/00 ,  C07C201/08 ,  C07C201/16 ,  C07C205/06

    CPC分类号： C07C201/16

    摘要： Sulphuric and nitric acids present in dinitrotoluene are separated from the dinitrotoluene by adding up to 10 wt. % water (based on quantity of dinitrotoluene) to the mixture of dinitrotoluene, sulphuric acid and nitric acid, mixing and separating the aqueous phase containing nitric and sulphuric acids. The mixtures treated by this process generally contain up to 5 wt. % nitric acid and up to 6 wt. % sulphuric acid.

    摘要翻译： 通过加入10重量％的二硝基甲苯将二硝基甲苯中存在的硫酸和硝酸与二硝基甲苯分离。 以二硝基甲苯，硫酸和硝酸的混合物为基准，混合分离含有硝酸和硫酸的水相。 通过该方法处理的混合物通常含有至多5wt。 硝酸和最多6重量％ ％ 硫酸。

    Process for working-up aqueous amine solutions
    5.
    发明授权
    Process for working-up aqueous amine solutions 失效
    处理胺水溶液的方法

    公开(公告)号：US4720326A

    公开(公告)日：1988-01-19

    申请号：US14759

    申请日：1987-02-13

    申请人： Heiko Beckhaus ,  Harro Witt ,  Dieter Becher ,  Hermann Dallmeyer ,  Uwe J. Zarnack

    发明人： Heiko Beckhaus ,  Harro Witt ,  Dieter Becher ,  Hermann Dallmeyer ,  Uwe J. Zarnack

    IPC分类号： C07C209/84 ,  C07C67/00 ,  C07C209/00 ,  C07C209/36 ,  C07C211/50 ,  C07C211/51 ,  B01D3/00

    CPC分类号： C07C209/36 ,  Y10S203/08 ,  Y10S203/20

    摘要： An amine is separated from an aqueous solution of amine and volatile organic compounds by distillation in a column. The vapors generated during distillation are condensed. The condensed vapors are then passed into a separating device in which the volatile organic compounds are removed. The liquid remaining in the separating device is then fed to the head of the distillation column. Water is removed from the column in a sidestream and diamine is the residue. This process is particularly effective in recovering aromatic diamines from solutions which accumulate during hydrogenation of dinitro aromatic compounds.

    摘要翻译： 通过在塔中蒸馏将胺与胺和挥发性有机化合物的水溶液分离。 蒸馏过程中产生的蒸气浓缩。 然后将冷凝的蒸气送入除去挥发性有机化合物的分离装置中。 然后将残留在分离装置中的液体进料到蒸馏塔的头部。 在侧流中从塔中除去水，二胺是残渣。 该方法在二硝基芳族化合物的氢化期间积聚的溶液中回收芳族二胺特别有效。

    Process for the production of dinitrotoluene
    6.
    发明授权
    Process for the production of dinitrotoluene 失效
    生产二硝基甲苯的方法

    公开(公告)号：US4663490A

    公开(公告)日：1987-05-05

    申请号：US710895

    申请日：1985-03-12

    申请人： Rudolf Gerken ,  Gunter Lailach ,  Dieter Becher ,  Harro Witt

    发明人： Rudolf Gerken ,  Gunter Lailach ,  Dieter Becher ,  Harro Witt

    IPC分类号： C07C67/00 ,  C07C201/00 ,  C07C201/08 ,  C07C205/06 ,  C07C79/10

    CPC分类号： C07C201/08

    摘要： In the production of dinitrotoluene by a two-stage reaction of toluene with nitric acid in the presence of sulphuric acid, wherein toluene is nitrated to mononitrotoluene in the first stage using spent acid from the second stage, and the mononitrotoluene is nitrated to dinitrotoluene in the second stage using concentrated spent acid from the first stage, the improvement which comprises concentrating spent acid under vacuum in an indirectly-heated evaporator and feeding mononitrotoluene into the superheated vapor of the evaporator.

    摘要翻译： 在硫酸存在下，通过甲苯与硝酸的两步反应制备二硝基甲苯，其中使用第二阶段的废酸在第一阶段将甲苯硝化为一硝基甲苯，并将一硝基甲苯硝化为二硝基甲苯 第二阶段使用来自第一阶段的浓缩废酸，其改进包括在间接加热的蒸发器中真空浓缩废酸，并将单硝基甲苯加入到蒸发器的过热蒸气中。

    Process for the separation of high-boiling materials from the reaction mixture generated during the production of diaminotoluene
    7.
    发明授权
    Process for the separation of high-boiling materials from the reaction mixture generated during the production of diaminotoluene 失效
    在制备二氨基甲苯期间产生的反应混合物中分离高沸点物质的方法

    公开(公告)号：US5728880A

    公开(公告)日：1998-03-17

    申请号：US806139

    申请日：1997-02-25

    申请人： Heiko Beckhaus ,  Harro Witt ,  Uwe-Jens Zarnack ,  Gerd Greger

    发明人： Heiko Beckhaus ,  Harro Witt ,  Uwe-Jens Zarnack ,  Gerd Greger

    IPC分类号： B01D3/14 ,  C07C209/84 ,  C07C209/86 ,  C07C211/50

    CPC分类号： C07C209/86 ,  C07C209/84

    摘要： Amine mixtures generated during the production of diaminotoluene by hydrogenating dinitrated aromatic compounds are treated to separate high boiling materials from the desired amine products. In this process, any water of reaction and any solvent are first removed from the diaminotoluene isomer mixture (TDA mixture). The low-boiling TDA isomers are then separated using a TDA isomer distillation column. In the process of the present invention, the bottom phase remaining after the initial distillation contains a mixture of m-TDA and high-boiling materials. This bottom phase is separated and concentrated until the high-boiling material content is from approximately 25 to 60 wt. %. This concentrated bottom phase is then mixed with o-TDA in a ratio of 1:1 to 1:5 and a m-/o-TDA mixture is removed by distillation. The m-/o-TDA mixture thus recovered is then returned to the TDA isomer distillation column.

    摘要翻译： 处理通过氢化二硝基芳族化合物生产二氨基甲苯期间产生的胺混合物，以将高沸点物质与所需的胺产物分开。 在该方法中，首先从二氨基甲苯异构体混合物（TDA混合物）中除去任何反应水和任何溶剂。 然后使用TDA异构体蒸馏塔分离低沸点TDA异构体。 在本发明的方法中，初始蒸馏后残留的底部相含有m-TDA和高沸点物质的混合物。 将该底相分离并浓缩，直到高沸点物质含量为约25至60wt。 ％。 然后将浓缩的底相与0-TDA以1:1至1:5的比例混合，并通过蒸馏除去m- / o-TDA混合物。 然后将如此回收的m- / o-TDA混合物返回到TDA异构体蒸馏塔。