Process for preparing potassium monoethyl malonate

US6172257A · kind A · utility

Assignee

• Creanova Spezialchemie GmbH · DE

Inventors

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

Key dates

• Filing date: Apr 19, 1999
• Grant date: Jan 9, 2001
• Expiry date: Apr 19, 2019

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.