Isolation of 1,3-butadiene

US4859286A · kind A · utility

Assignee

• BASF SE

Inventors

• Gerd Kaibel · Lampertheim, DE
• Werner Hefner · Lampertheim, DE
• Peter Keller · Bruchmühlbach-Miesau, DE
• Werner Drewitz · Erpolzheim, DE

Key dates

• Filing date: Mar 18, 1988
• Grant date: Aug 22, 1989
• Expiry date: Mar 18, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/20
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

1,3-Butadiene is isolated from a C.sub.4 -hydrocarbon mixture containing 1,3-butadiene and small amount of propyne and C.sub.5 -hydrocarbons by extractive distillation with a selective solvent and subsequent distillative purification of the crude 1,3-butadiene obtained in the extractive distillation.