Method for production propylene from a flow containing C4 to C8 olefins

US7425663B2 · kind B2 · utility

Assignee

• Lurgi GmbH · DE

Inventors

• Hermann Bach · Heiligenroth, DE
• Harald Kömpel · Neu-Isenburg, DE
• Bernd Ahlers · Dietzenbach, DE
• Peter Trabold · Darmstadt, DE
• Frank Hoper · Karben, DE

Key dates

• Filing date: Jun 5, 2003
• Grant date: Sep 16, 2008
• Expiry date: Feb 5, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P30/40
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In a method for the production of propylene, a charge stream containing C4 to C6 olefins is evaporated, superheated, mixed with hot water vapor, the olefins vapor mixture converted on a zeolite catalyst, the reaction mixture formed thereby cooled, and then partially condensed. In order to increase the yield of propylene, the gaseous phase containing ethylene, propylene, C4 to C8 olefins, and additional hydrocarbons that is accumulated during the partial condensation is compressed, the gaseous and liquid phase containing propylene, ethylene, and other light hydrocarbons that exit from the compression step is separated into a gaseous phase containing propylene, ethylene, and other light hydrocarbons and a liquid phase containing C4+ olefins, and the liquid phase is separated into a fraction containing C4 to C6 olefins and a fraction containing C7+ olefins.