Process for the production of malonic acid or a salt thereof

US5817870A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Thomas Haas · Munster, DE
• Martin Meier · Werl, DE
• Christoph Brossmer · Frankfurt, DE
• Dietrich Arntz · Oberursel, DE
• Andreas Freund · Kleinostheim, DE

Key dates

• Filing date: Jul 21, 1997
• Grant date: Oct 6, 1998
• Expiry date: Jul 21, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/235
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Malonic acid or a salt of the same is obtained at high yield according to the invention through the catalytic oxidation with oxygen or an O.sub.2 -containing gas of 3-hydroxy propionaldehyde or 3-hydroxy propionic acid in the aqueous phase. The conversion takes place in the presence of at least 10 percent by weight, relative to the C.sub.3 building block used, of a precious metal from the platinum group. Pd and Pt supported catalysts are preferred.