公开(公告)号：US09308515B2

公开(公告)日：2016-04-12

申请号：US14330281

申请日：2014-07-14

申请人： BASF SE

发明人： Gerrit Waters ,  Johannes Buettner ,  Andreas Raichle ,  Markus Hiller ,  Peter Renze ,  Michael Herrich ,  Helmut Rueger ,  Burkhard Hantel ,  Arndt Hofmann ,  Ruediger Fritz ,  Kathrin Richter ,  Holgar Braunsberg ,  Lothar Bruntsch

IPC分类号： B01J19/26 ,  C07C209/36 ,  B01J8/22

CPC分类号： B01J19/26 ,  B01J8/226 ,  B01J8/228 ,  B01J2208/00123 ,  B01J2208/00132 ,  B01J2208/00141 ,  B01J2208/0015 ,  B01J2208/00902 ,  B01J2208/00911 ,  B01J2219/00761 ,  C07C209/36 ,  C07C211/50

摘要： The invention relates to a process for preparing aromatic amines by hydrogenation of corresponding nitroaromatics by means of hydrogen, and also an apparatus suitable for this purpose. In particular, the invention relates to a process for preparing toluenediamine (TDA) by hydrogenation of dinitrotoluene (DNT).

摘要翻译： 本发明涉及通过氢气对相应的硝基芳族化合物进行氢化制备芳族胺的方法，以及适用于该目的的装置。 特别地，本发明涉及通过氢化二硝基甲苯（DNT）制备甲苯二胺（TDA）的方法。

公开(公告)号：US09249083B2

公开(公告)日：2016-02-02

申请号：US13870506

申请日：2013-04-25

申请人： BASF SE

发明人： Samuel Neto ,  Ruediger Fritz ,  Renate Hempel ,  Holger Allardt ,  Barbara Becker ,  Julia Leschinski ,  Sebastian Ahrens ,  Heinrich Hermann ,  Mirko Haendel ,  Juergen Poehlmann

IPC分类号： C07C205/00 ,  C07C201/00 ,  C07C205/06 ,  C07C201/06

CPC分类号： C07C205/06 ,  C07C201/06

摘要： The invention relates to a process for scrubbing a crude mixture comprising dinitrotoluene, nitric acid, nitrogen oxides and sulfuric acid obtained in the nitration of toluene after the nitrating acid has been separated off, which comprises two scrubbing steps (SS-I) and (SS-II), wherein i) in a first scrubbing step (SS-I), the crude mixture is extracted with a scrubbing acid I comprising nitric acid, nitrogen oxides and sulfuric acid in a scrub comprising at least one extraction stage, where the scrubbing acid discharged from the first extraction stage (SS-I-1) of the first scrubbing step (SS-I) has a total acid content of from 20 to 40% by weight and a prescrubbed crude mixture is obtained, ii) in a second scrubbing step (SS-II), the prescrubbed crude mixture comprising dinitrotoluene is extracted with a scrubbing acid II in a scrub comprising at least one extraction stage, where the scrubbing acid discharged from the first extraction stage (SS-II-1) of the second scrubbing step (SS-II) has a pH of less than or equal to 4 and a mixture comprising dinitrotoluene which is essentially free of nitric acid, sulfuric acid and nitrogen oxides is obtained.

摘要翻译： 本发明涉及一种在分离出硝化酸后，除去包含二硝基甲苯，硝酸，氮氧化物和硫酸在硝化硝酸中得到的粗混合物的方法，该方法包括两个洗涤步骤（SS-I）和（SS -II），其中i）在第一洗涤步骤（SS-1）中，粗制混合物用包含硝酸，氮氧化物和硫酸的洗涤酸I在包含至少一个萃取阶段的洗涤中萃取，其中洗涤 从第一洗涤步骤（SS-I）的第一提取阶段（SS-I-1）排出的酸的总酸含量为20至40重量％，得到预混合的粗混合物，ii）在第二次 洗涤步骤（SS-II），包含二硝基甲苯的预先混合的粗混合物在洗涤中用擦洗酸II萃取，其包含至少一个提取阶段，其中从第一提取阶段（SS-II-1）排出的洗涤酸 第二洗涤步骤（SS- II）具有小于或等于4的pH，并且获得基本上不含硝酸，硫酸和氮氧化物的二硝基甲苯的混合物。