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. 03, 2009
Filed:
Aug. 08, 2003
Frank Funke, Ludwigshafen, DE;
Thomas Hill, Ludwigshafen, DE;
Jobst Rüdiger Von Watzdorf, Mannheim, DE;
Wolfgang Mattmann, Limburgerhof, DE;
Wolfgang Harder, Weinheim, DE;
Erhard Henkes, Einhausen, DE;
Gerd Littmann, Weinheim, DE;
Manfred Julius, Limburgerhof, DE;
Frank Funke, Ludwigshafen, DE;
Thomas Hill, Ludwigshafen, DE;
Jobst Rüdiger Von Watzdorf, Mannheim, DE;
Wolfgang Mattmann, Limburgerhof, DE;
Wolfgang Harder, Weinheim, DE;
Erhard Henkes, Einhausen, DE;
Gerd Littmann, Weinheim, DE;
Manfred Julius, Limburgerhof, DE;
BASF Aktiengesellschaft, , DE;
Abstract
The invention relates to a process for recovering 3-aminomethyl-3,5,5-trim-ethylcyclohexylamine (isophoronediamine, IPDA) having a fractionally distilled cis/trans isomer ratio of at least 73/27. The process includes the following steps: