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:
Aug. 15, 2006
Filed:
Jan. 30, 2003
Dominic Vanoppen, Kapellen, BE;
Ekkehard Schwab, Neustadt, DE;
Frederick Van Laar, Limburgerhof, DE;
Hartwig Voss, Frankenthal, DE;
Steffen Oehlenschlaeger, Ludwigshafen, DE;
Wolfgang Mackenroth, Bad Duerkheim, DE;
Konrad Morgenschweis, Dresden, DE;
Ulrich Penzel, Tettau, DE;
Bernd Weidner, Wormlage, DE;
Dominic Vanoppen, Kapellen, BE;
Ekkehard Schwab, Neustadt, DE;
Frederick van Laar, Limburgerhof, DE;
Hartwig Voss, Frankenthal, DE;
Steffen Oehlenschlaeger, Ludwigshafen, DE;
Wolfgang Mackenroth, Bad Duerkheim, DE;
Konrad Morgenschweis, Dresden, DE;
Ulrich Penzel, Tettau, DE;
Bernd Weidner, Wormlage, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
The invention provides a process for preparing amines by catalytic hydrogenation of nitroaromatics and subsequent removal of the catalysts from the reaction mixture, which contains at least one aromatic amine and water, which comprises carrying out the removal of the catalysts by means of membrane filtration, which is carried out at a pressure on the suspension side of from 5 to 50 bar, a pressure difference between the suspension side and the permeate side of at least 0.3 bar and a flux rate on the suspension side of from 1 to 6 m/s.