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. 29, 2009
Filed:
Feb. 22, 2006
Dominic Vanoppen, Schifferstadt, DE;
Frederik Van Laar, Limburgerhof, DE;
Thomas Beuermann, Mannheim, DE;
Georg Krug, Moerlenbach, DE;
Steffen Oehlenschlaeger, Ludwigshafen, DE;
Ekkehard Schwab, Neustadt, DE;
Hartwig Voss, Frankenthal, DE;
Konrad Morgenschweis, Dresden, DE;
Ulrich Penzel, Tettau, DE;
Dietrich Tittelbach-helmrich, Tauscha, DE;
Dominic Vanoppen, Schifferstadt, DE;
Frederik Van Laar, Limburgerhof, DE;
Thomas Beuermann, Mannheim, DE;
Georg Krug, Moerlenbach, DE;
Steffen Oehlenschlaeger, Ludwigshafen, DE;
Ekkehard Schwab, Neustadt, DE;
Hartwig Voss, Frankenthal, DE;
Konrad Morgenschweis, Dresden, DE;
Ulrich Penzel, Tettau, DE;
Dietrich Tittelbach-Helmrich, Tauscha, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
The invention relates to a process for preparing aromatic amines by hydrogenation of nitroaromatics in the presence of catalysts, in which a fluid reaction mixture which comprises amines and from which the catalysts are separated off is formed in a reactor. After the catalysts have been separated off, a measurement of the absorption of UV/VIS radiation by the reaction mixture is carried out to determine the concentration of nitro and nitroso compounds in the reaction mixture.