Method for dehydrating alpha-substituted carboxylic acids

US9428437B2 · kind B2 · utility

Assignee

• Evonik Röhm GmbH · DE

Inventors

• Alexander May · Seeheim-Jugenheim, DE
• Steffen Krill · Mühltal, DE
• Joerg Becker · Bad Aibling, DE
• Willi Ploesser · Seeheim-Jugenheim, DE
• Marcel Treskow · Darmstadt, DE
• Martin Koestner · Darmstadt, DE

Key dates

• Filing date: Apr 28, 2014
• Grant date: Aug 30, 2016
• Expiry date: Apr 28, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention describes a process for preparing alpha-beta-unsaturated carboxylic acids by dehydration of hydroxycarboxylic or alkoxycarboxylic acids which are substituted in the alpha position, in particular 2-hydroxyisobutyric acid, while avoiding accumulation of by-products and additives.