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:
Jul. 10, 1990
Filed:
Jun. 23, 1988
Applicant:
Inventors:
Jurgen Weber, Oberhausen, DE;
Detlef Kampmann, Bochum, DE;
Franz Thonnessen, Oberhausen, DE;
Claus Kniep, Oberhausen, DE;
Assignee:
Hoechst Aktiengesellschaft, Werk Ruhrchemie, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564471 ; 564472 ; 564473 ; 564474 ;
Abstract
A process for the preparation of 2,2'-oxybis[N,N-dimethylethanamine] by reaction of 2,2'oxybisethanamine, hydrogen and formaldehyde having a reduced percentage of water on conventional fixed-bed hydrogenation catalysts. The reactants, especially the amine and formaldehyde, are heated to a predetermined temperature separate from each other, and then mixed with each other in the presence of the fixed-bed catalyst.