Method for purifying isobutene from a C4 stream and process system therefor

US11649197B2 · kind B2 · utility

Assignees

• OMV DOWNSTREAM GMBH · AT
• BASF SE

Inventors

• Suman Thotla · Mannheim, DE
• Pawel Czajka · Mannheim, DE
• Stefan Iselborn · Bischofswerda, DE
• Kai-Uwe WEMHÖNER · Wien, AT
• Jürgen Popp · Jena, DE

Key dates

• Filing date: Aug 2, 2019
• Grant date: May 16, 2023
• Expiry date: Aug 2, 2039

Classification

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

Abstract

A process for the purification of isobutene from a C4 stream with at least 1-butene, 2-butene, isobutane and isobutene includes isomerizing 1-butene from a stream of material which is concentrated in isobutane and isobutene obtained from the C4 stream into 2-butene, using a catalyst in an isomerization reactor; supplying a product stream from the isomerization reactor to a rectification column; and providing a stream of material which is concentrated in isobutene. A processing facility is utilized for the purification of isobutene from the C4 stream.