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:
Mar. 17, 2020
Filed:
Dec. 21, 2015
Nouryon Chemicals International B.v., Arnhem, NL;
Albertus Jacobus Maria Bouwman, Groessen, NL;
Hubertus Johannes Jongen, Gendringen, NL;
Roy Gérard Doppen, Deventer, NL;
Martin Heus, Arnhem, NL;
Elwin Schomaker, Arnhem, NL;
NOURYON CHEMICALS INTERNATIONAL B.V., Arnhem, NL;
Abstract
The present invention relates to alanine N-acetic acid precursors of formula (i) COOM-CH(CH3)—NH—(CH2CN), wherein M is hydrogen (alanine N-monoacetonitrile), or (ii) COOM-CH(CH3)—N—(CH2CN)2, wherein 0 to 50% of all M is sodium or potassium and 50 to 100% of all M is hydrogen (alanine N,N-diacetonitrile and its partial sodium or potassium salts) comprising L-alanine to D-alanine in a range of from 75:25 to 50:50 (L:D), or (iii) COOM-CH(CH3)—N—(CH2CONH2)2, wherein M is hydrogen (alanine N,N-diacetamide), in the form of crystals, and relates to a process to prepare these precursors and their use, especially to give MGMA or MGDA.