Process for preparing potassium monoethyl malonate

US6580004B1 · kind B1 · utility

Assignee

• Degussa AG · DE

Inventors

• Juergen Muhr · Bornheim, DE
• Marcel Feld · Cologne, DE

Key dates

• Filing date: Sep 25, 2000
• Grant date: Jun 17, 2003
• Expiry date: Aug 3, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/30
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing potassium monoethyl malonate by selective saponification of malonic acid diethyl ester with potassium hydroxide, in which the potassium hydroxide is added to the malonic acid diethyl ester, malonic acid diethyl ester and potassium hydroxide are used in a molar ratio of at least 1.5 and the potassium hydroxide is effectively distributed into the malonic acid diethyl ester.