Use of glycine-N, N-diacetic acid derivatives as biodegradable complexing agents for alkaline earth metal ions and heavy metal ions

US6008176A · kind A · utility

Assignee

• BASF SE

Inventors

• Juergen Schneider · Freinsheim, DE
• Birgit Potthoff-Karl · Weinheim, DE
• Alexander Kud · Eppelsheim, DE
• Richard Baur · Mutterstadt, DE
• Alfred Oftring · Bad Dürkheim, DE
• Thomas Greindl · Bad Dürkheim, DE

Key dates

• Filing date: May 6, 1998
• Grant date: Dec 28, 1999
• Expiry date: May 6, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D2111/20
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Glycine-N,N-diacetic acid derivatives and their alkali metal, alkaline earth metal, ammonium and substituted ammonium salts are used as complexing agents for alkaline earth metal and heavy metal ions with the exception of .alpha.-alanine-N,N-diacetic acid as textile detergent builders in powder detergent formulations and as calcium sequestrants in oral hygiene products.