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:
Mar. 11, 2008
Filed:
Jan. 07, 2005
Carsten Knoesche, Niederkirchen, DE;
Martin Sohn, Mannheim, DE;
Ulrich Penzel, Tettau, DE;
Hans-juergen Pallasch, Ludwigshafen, DE;
Gunter Georgi, Lauchhammer, DE;
Wolfgang Mackenroth, Bad Duerkheim, DE;
Hans Volkmar Schwarz, Overijse, BE;
Stefan Maixner, Schwetzingen, DE;
Gerald Molz, Maikammer, DE;
Eckhard Stroefer, Mannheim, DE;
Carsten Knoesche, Niederkirchen, DE;
Martin Sohn, Mannheim, DE;
Ulrich Penzel, Tettau, DE;
Hans-Juergen Pallasch, Ludwigshafen, DE;
Gunter Georgi, Lauchhammer, DE;
Wolfgang Mackenroth, Bad Duerkheim, DE;
Hans Volkmar Schwarz, Overijse, BE;
Stefan Maixner, Schwetzingen, DE;
Gerald Molz, Maikammer, DE;
Eckhard Stroefer, Mannheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
The invention relates to a process for distillatively preparing TDA from a reactant stream comprising TDA, high boilers and low boilers in a dividing wall column in which a dividing wall is disposed in the longitudinal direction of the column to form an upper combined column region (), a lower combined column region (), a feed section () having a rectifying section () and stripping section (), and also a withdrawal section () having a rectifying section () and stripping section (), which comprises the following steps: