Process and plant for producing olefins from oxygenates

US10214461B2 · kind B2 · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Martin Rothamel · Frankfurt, DE
• Stephane Haag · Frankfurt am Main, DE
• Frank Castillo-Welter · Friedrichsdorf, DE
• Peter Trabold · Darmstadt, DE
• Martin GORNY · Eschborn, DE
• Sven Pohl · Frankfurt am Main, DE

Key dates

• Filing date: Sep 2, 2015
• Grant date: Feb 26, 2019
• Expiry date: Sep 2, 2035

Classification

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

Abstract

A process for producing olefins from oxygenates can include the following steps: (i) heterogeneously catalyzed conversion of at least one oxygenate to a product stream containing C2 olefins, C3 olefins, C4 olefins, C5/6 hydrocarbon compounds, and C7+ hydrocarbon compounds; and (ii) separation of a propylene stream consisting of C3 olefins for at least 95 wt-%, wherein at least 10 wt-% of the propylene stream are recirculated into process step (i).