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:
Sep. 22, 2015
Filed:
Jan. 06, 2012
Michael Merkel, Düsseldorf, DE;
Karl-heinz Wilke, Moers, DE;
Peter Lehner, Houston, TX (US);
Andre Lago, Hamburg, DE;
Erwin Dieterich, Köln, DE;
Michael Merkel, Düsseldorf, DE;
Karl-Heinz Wilke, Moers, DE;
Peter Lehner, Houston, TX (US);
Andre Lago, Hamburg, DE;
Erwin Dieterich, Köln, DE;
BAYER INTELLECTUAL PROPERTY GMBH, Monheim, DE;
Abstract
The invention relates to a process for the continuous preparation of aromatic amines by hydrogenation of the corresponding nitroaromatics in the presence of catalysts arranged in reaction spaces, in which an adiabatically operated reaction space RA is connected downstream of an isothermally operated reaction space RI and RA additionally also has a separate feed for the nitroaromatic to be hydrogenated, RI is fed with the nitroaromatic to be hydrogenated from the start to the end of the hydrogenation, and the product mixture emerging from RI is fed into RA from the start to the end of the hydrogenation, wherein RA can additionally be fed via the separate feed with the nitroaromatic to be hydrogenated.