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. 06, 2015
Filed:
Jan. 10, 2011
Applicants:
Wolfgang Lorenz, Dormagen, DE;
Bernd Pennemann, Bergisch Gladbach, DE;
Inventors:
Wolfgang Lorenz, Dormagen, DE;
Bernd Pennemann, Bergisch Gladbach, DE;
Assignee:
Bayer Intellectual Property GmbH, Monheim, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C 211/00 (2006.01); C07C 209/36 (2006.01);
U.S. Cl.
CPC ...
C07C 209/36 (2013.01); C07C 209/36 (2013.01); C07C 211/51 (2013.01);
Abstract
The invention relates to a process for the preparation of aromatic amines in the liquid phase by catalytic hydrogenation of the corresponding nitroaromatic compounds in at least two reaction spaces connected in series, wherein at least one reaction space is operated isothermally and at least the reaction space connected downstream thereof is operated adiabatically, and in preferred embodiments the sudden adiabatic temperature change is used for monitoring the reaction.