Mixtures of chelating agents including an L-enantiomer-rich MGDA, and process for making such mixtures

US10189772B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Constanze Franzke · Goldkronach, DE
• Frank Jaekel · Ludwigshafen, DE
• Carsten SUELING · Bischofswerda, DE

Key dates

• Filing date: Mar 1, 2016
• Grant date: Jan 29, 2019
• Expiry date: Mar 1, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07B2200/07
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Mixtures comprise (A) 90 to 99.9% by weight of a mixture of L- and D-enantiomers of methyl glycine diacetic acid (MGDA) or its respective mono-, di- or trialkali metal or mono-, di- or triammonium salts, said mixture containing predominantly the respective L-enantiomer with an enantiomeric excess (ee) in the range of from 10 to 99%, and (B) in total 0.1 to 10% by weight of the diacetic acid derivative of at least one amino acid selected from valine, leucine, isoleucine, and tyrosine, as free acids or respective mono-, di- or trialkali metal or mono-, di- or triammonium salts, percentages referring to the sum from (A) and (B).