Method for the production of phosphonomethylglycine

US6696602B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Nicola Christiane Aust · Mendig, DE
• Thomas Butz · Mannheim, DE
• Martin Fischer · Ludwigshafen, DE

Key dates

• Filing date: Feb 6, 2002
• Grant date: Feb 24, 2004
• Expiry date: May 16, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/3813
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the preparation of phosphonomethylglycine, wherein N-phosphonomethyliminodiacetic acid N-oxide is brought into contact with a catalytically effective amount of thiocyanic acid or a salt thereof.