公开(公告)号：US09469594B2

公开(公告)日：2016-10-18

申请号：US14394142

申请日：2013-04-12

Applicant: Bayer MaterialScience AG

Inventor： Michael Merkel ,  Thomas Knauf ,  Cliff Andre Peters ,  Thorsten Schmidt ,  Karl-Heinz Wilke

IPC: C07C209/36 ,  C07C209/84

CPC classification number: C07C209/36 ,  C07C209/84 ,  C07C211/46 ,  C07C211/47

Abstract: The present invention relates to a method for producing aromatic amines by the hydrogenation of aromatic nitro compounds. This method supplies aromatic nitro compounds and hydrogen to a reactor and contacts them with a hydrogenation catalyst; and stops the supply of aromatic nitro compounds and hydrogen to the reactor. The supply of aromatic nitro compounds and hydrogen to the reactor is stopped to ensure safe shutdown of the reactor.

Abstract translation: 本发明涉及通过芳族硝基化合物的氢化生产芳族胺的方法。 该方法将芳香族硝基化合物和氢气供给反应器，并与氢化催化剂接触; 并停止向反应器供应芳族硝基化合物和氢气。 停止向反应器供应芳族硝基化合物和氢气，以确保反应器的安全关闭。

公开(公告)号：US20150087862A1

公开(公告)日：2015-03-26

申请号：US14394142

申请日：2013-04-12

Applicant: Bayer MaterialScience AG

Inventor： Michael Merkel ,  Thomas Knauf ,  Cliff Andre Peters ,  Thorsten Schmidt ,  Karl-Heinz Wilke

IPC: C07C209/36

CPC classification number: C07C209/36 ,  C07C209/84 ,  C07C211/46 ,  C07C211/47

Abstract: The present invention relates to A method for producing aromatic amines by the hydrogenation of aromatic nitro compounds. This method comprises: A) supplying aromatic nitro compounds and hydrogen to a reactor and contacting them with a hydrogenation catalyst; and B) stopping the supply of aromatic nitro compounds and hydrogen to the reactor. In addition, B) is carried out by: B1) stopping the supply of aromatic nitro compounds to the reactor such that any remaining aromatic nitro compounds present in the reactor and/or in parts of the installation that are fluidically connected to the reactor upstream react with the hydrogen that is still being supplied to the reactor, and B2) stopping the supply of hydrogen after a predetermined time interval and/or after the concentration of aromatic nitro compounds in the gas flow entering the reactor falls below a predetermined value.

Abstract translation: 本发明涉及芳香族硝基化合物的氢化制造芳香胺的方法。 该方法包括：A）将芳香族硝基化合物和氢气供给反应器，并与氢化催化剂接触; 和B）停止向反应器供应芳族硝基化合物和氢气。 此外，B）通过以下方式进行：B1）停止向反应器供应芳族硝基化合物，使得存在于反应器中的任何剩余的芳族硝基化合物和/或流体连接到反应器上游的部分设备反应 其中仍然供应到反应器的氢气，以及B2）在预定时间间隔之后和/或在进入反应器的气流中的芳族硝基化合物的浓度之后停止氢气供应降低到预定值以下。