Process for purifying a recycle stream from a 1,3-butadiene processing plant

US8642828B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Bernd Heida · Haßloch, DE
• Randolf Hugo · Dirmstein, DE

Key dates

• Filing date: Jan 2, 2013
• Grant date: Feb 4, 2014
• Expiry date: Jan 2, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/10
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Secondary streams in 1,3-butadiene processing plants still contain high amounts of valuable 1,3-butadiene. An energy-efficient process for purifying a recycle stream from a 1,3-butadiene processing plant is provided. The recycle stream is divided into two substreams: the first substream for prepurifying pure 1,3-butadiene feedstream by removing high boilers relative to 1,3-butadiene in a stripping column and the second substream in an extractive distillation plant.