Energy-efficient process for removing butenes from C4-hydrocarbon streams and subsequent n/iso separation

US11945777B2 · kind B2 · utility

Assignee

• Evonik Oxeno GmbH & Co. KG · DE

Inventors

• Philip Lutze · Dinslaken, DE
• Stephan Peitz · Johannesweg, DE
• Armin Matthias Rix · Marl, DE
• Tanita Valèrie Six · Dortmund, DE
• Moritz Schröder · Kohlenbissen, DE
• Niklas Paul · Marl, DE

Key dates

• Filing date: Jan 21, 2022
• Grant date: Apr 2, 2024
• Expiry date: Jan 21, 2042

Classification

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

Abstract

A process for removing butenes from C4-hydrocarbon streams containing butanes and butenes involves extractive distillation with a suitable solvent. The process also involves heat integration, which allows utilization of the heat of the solvent for heating and/or at least partly evaporating various streams.