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. 22, 2014
Filed:
Mar. 26, 2012
Robert Baumann, Mannheim, DE;
Markus Christian Biel, Mannheim, DE;
Axel Franzke, Mannheim, DE;
Thomas Heidenfelder, Randolph, NJ (US);
Paul Klingelhoefer, Mannheim, DE;
Alfred Oftring, Bad Dürkheim, DE;
Robert Baumann, Mannheim, DE;
Markus Christian Biel, Mannheim, DE;
Axel Franzke, Mannheim, DE;
Thomas Heidenfelder, Randolph, NJ (US);
Paul Klingelhoefer, Mannheim, DE;
Alfred Oftring, Bad Dürkheim, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to a process for preparing aminopolycarboxylates proceeding from an amino acid which, in a first process step is reacted with ethylene oxide to give an intermediate mixture comprising the corresponding dialkanolamine, and then the intermediate mixture, in a second process step is converted catalytically using a base to the corresponding aminopolycarboxylate, wherein the amino acid, before the reaction with ethylene oxide in the first process step, is supplied to a partial neutralization with 0.70 to 0.99 equivalent of base per acid group, or, in the first process step, an amino acid which has already been partly neutralized with 0.70 to 0.99 equivalent of base per acid group is used.