Method for producing methylglycine-N,N-diethanoic acid-trialkali metal salts with a low by-product content

US7671234B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Alfred Oftring · Bad Dürkheim, DE
• Gerold Braun · Ludwigshafen, DE
• Friedrich Wirsing · Speyer, DE
• Armin Stamm · Mainz, DE
• Kai-Uwe Baldenius · Ludwigshafen, DE

Key dates

• Filing date: May 2, 2006
• Grant date: Mar 2, 2010
• Expiry date: May 2, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C227/26
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for preparing low-by-product, light-color methylglycine-N,N-diacetic acid tri(alkali metal) salt by alkaline hydrolysis of methylglycinediacetonitrile (MGDN), comprising the steps in the sequence (a) to (f):