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:
Apr. 24, 2001
Filed:
Jul. 08, 1999
Applicant:
Inventors:
Klaus Ihrig, Waldbrunn-Schollbrunn, DE;
Manfred Bergfeld, Erlenbach-Mechenhard, DE;
Christian Blaufelder, Obernburg, DE;
Assignee:
Akzo Nobel NV, Arnhem, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
C07C / ;
Abstract
A process is described for the production of N,N,N′,N′-tetra-(2-hydroxyethyl)-ethylene diamine in a solvent, in which ethylene diamine is reacted selectively with ethylene oxide in the absence of water in one or more saturated C,-C,alcohols at a temperature from 120 to 220° C. and at a pressure from 2 to 60 bar in a molar ratio of 1:4, with a high yield. The conversion is preferably carried out in isopropanol, isomeric C,-C,alcohol mixtures, C,alcohol mixtures or C,alcohol mixtures at a temperature from 140 to 180° C.