Process for preparing cyclododecatrienes with recycling of the catalyst

US6403851B1 · kind B1 · utility

Assignee

• Degussa AG · DE

Inventors

• Norbert Wilczok · Wiesloch, DE
• Thomas Schiffer · Haltern, DE
• Peter Wiedenbusch · Marl, DE

Key dates

• Filing date: Jul 13, 2000
• Grant date: Jun 11, 2002
• Expiry date: Jul 13, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/584
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Cyclododecatrienes may be prepared in a continuous process by reacting 1,3-butadiene in the presence of a catalyst system and cyclooctadiene and/or cyclododecatriene. The resulting crude cyclododecatriene product may be separated from this mixture by distillation, and 50 to 100% of the catalyst system may be recycled back into the process.