Hydrolysis of the residues obtained in the production of isophorone to recover isophorone and acetone

US9035102B2 · kind B2 · utility

Assignee

• Evonik Industries AG · DE

Inventors

• Joerg-Joachim Nitz · Essen, DE
• Stephan Kohlstruk · Marl, DE
• Robert Jansen · Collinsville, US
• Matthias Orschel · Munster, DE
• Andreas Merkel · Recklinghausen, DE
• Michael Demming · Ulmen, DE
• Matthias Mendorf · Dortmund, DE
• Jens DOERING · Dortmund, DE
• Axel Hengstermann · Senden, DE
• Andreas Hoff · Eslohe, DE
• Anja Mueller · Dortmund, DE

Key dates

• Filing date: Aug 8, 2014
• Grant date: May 19, 2015
• Expiry date: Aug 8, 2034

Classification

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

Abstract

A process for preparing isophorone (3,5,5-trimethyl-2-cyclohexen-1-one) is provided wherein distillation vapors from the work-up of product fractions are recycled to earlier stages of operation of the process.