Process for preparing sorbic acid by thermal cleavage

US6673963B2 · kind B2 · utility

Assignee

• Nutrinova Nutrition Specialist & Food Ingredients GmbH · DE

Inventors

• Daniel Decker · Castle Rock, US
• Guenter Roscher · Kelkheim, DE
• Christoph Mollenkopf · Frankfurt am Main, DE
• Erwin Weiss · Hofheim, DE
• Stefan Purps · Königstein, DE

Key dates

• Filing date: Sep 9, 2002
• Grant date: Jan 6, 2004
• Expiry date: Sep 9, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/09
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for preparing sorbic acid by thermal cleavage in a solvent of the polyester prepared from crotonaldehyde and ketene, the cleavage of the polyester being carried out in the presence of 20 to 100% by weight of a secondary or tertiary aliphatic, alicyclic nitrogen- and/or oxygen-containing amine, or aliphatic-aromatic substituted amine, as catalyst.