Preparation of potassium magnesium L-ascorbate 2-phosphate

US5202445A · kind A · utility

Assignee

• BASF SE

Inventors

• Walter Dobler · Schwetzingen, DE
• Hartwig Voss · Bischofswerda, DE
• Friedhelm Balkenhohl · Schifferstadt, DE
• Joachim Paust · Schifferstadt, DE

Key dates

• Filing date: Aug 20, 1991
• Grant date: Apr 13, 1993
• Expiry date: Aug 20, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/65515
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Potassium magnesium L-ascorbate 2-phosphate is prepared from an aqueous solution of potassium L-ascorbate 2-phosphate which is highly contaminated with KCl, as is produced in the phosphorylation of 5,6-isopropylidene-L-ascorbic acid, by adding to the solution about 1 equivalent of magnesium ions per equivalent of L-ascorbate 2-phosphate, and subsequently removing the KCl by electrodialysis. The product of this process is a novel salt of L-ascorbic acid 2-phosphate and has very advantageous handling properties.