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:
Sep. 08, 2020
Filed:
Feb. 28, 2018
Clariant International Ltd., Muttenz, CH;
Ertan Akgün, Ingolstadt, DE;
Martin Link, Mühldorf, DE;
Sarah Werner, Mühldorf, DE;
Klaus Raab, Burgkirchen, DE;
Peter Klug, Grossostheim, DE;
Karl Scheitzeneder, Engelsberg, DE;
Stefan Kreuzpointner, Töging, DE;
CLARIANT INTERNATIONAL LTD, Muttenz, CH;
Abstract
The invention relates to a method for preparing aqueous solutions of N,N-dimethylglucamine, characterized by first preparing an adduct of N-methylglucamine and formaldehyde in water at temperatures of between 15° C. and 40° C., and subsequently reacting said adduct to N,N-dimethylglucamine in the presence of a metal catalyst under hydrogen pressure at 20-68° C., followed by secondary hydrogenation at 70-120 bar and 70-110° C. once hydrogen absorption at 20-68° C. is completed.