The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 2016
Filed:
Apr. 12, 2013
Applicant:
Bayer Materialscience Ag, Leverkusen, DE;
Inventors:
Michael Merkel, Dusseldorf, DE;
Thomas Knauf, Dormagen, DE;
Cliff Andre Peters, Schmedeswurth, DE;
Thorsten Schmidt, Nindorf, DE;
Karl-Heinz Wilke, Moers, DE;
Assignee:
Covestro Deutschland AG, Kaiser-Wilhelm-Allee, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 209/36 (2006.01); C07C 209/84 (2006.01);
U.S. Cl.
CPC ...
C07C 209/36 (2013.01); C07C 209/84 (2013.01);
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.