Process for the preparation of aqueous sodium methioninate solutions and use of those solutions in the production of a granulate

US6126972A · kind A · utility

Assignee

• Degussa-Huels AG · DE

Inventors

• Martin Körfer · Goldbach, DE
• Lutz Rohland · Offenbach, DE
• Wolfram Binder · Rodenbach, DE
• Hans Joachim Hasselbach · Gelnhausen, DE
• Hans Christian Alt · Gelnhausen, DE
• Klaus Huthmacher · Gelnhausen, DE
• Heidemarie Kniesel · Hösbach, DE

Key dates

• Filing date: May 11, 1999
• Grant date: Oct 3, 2000
• Expiry date: May 11, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S426/807
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of aqueous sodium methioninate solutions having a low sodium carbonate content from the crude hydrolysis mixtures obtained in the hydrolysis of 5-(.beta.-methylmercaptoethyl)-hydantoin with from 1.1 to 6 equivalents of sodium hydroxide and/or sodium carbonate, by separating off sodium carbonate monohydrate while heating, and granulates subsequently prepared from those solutions by various processes.