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. 26, 2025
Filed:
Dec. 03, 2020
Applicant:
Basf SE, Ludwigshafen am Rhein, DE;
Inventors:
Michael Joedecke, Ludwigshafen am Rhein, DE;
Joerg Pastre, Ludwigshafen am Rhein, DE;
Assignee:
BASF SE, Ludwigshafen am Rhein, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 67/48 (2006.01); C07C 29/141 (2006.01); C07C 209/84 (2006.01); C07C 209/86 (2006.01); C07C 211/10 (2006.01);
U.S. Cl.
CPC ...
C07C 67/48 (2013.01); C07C 29/141 (2013.01); C07C 209/84 (2013.01); C07C 209/86 (2013.01); C07C 211/10 (2013.01);
Abstract
A process for producing EDA from a mixture comprising water (H2O), ethylenediamine (EDA) and N-methylethylenediamine (NMEDA) by feeding the mixture into a rectification column, wherein the rectification column is operated at the top pressure in the range of 5.0 to 7.5 bar.