Process for producing short-chain olefins with prolonged cycle time

US9624141B2 · kind B2 · utility

Assignee

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

Inventors

• Thomas Renner · Racine, US
• Frank Castillo-Welter · Friedrichsdorf, DE
• Stephane Haag · Frankfurt am Main, DE
• Martin GORNY · Eschborn, DE
• Theis Ohlhaver · Frankfurt am Main, DE
• Roberta Olindo · Frankfurt am Main, DE

Key dates

• Filing date: May 6, 2013
• Grant date: Apr 18, 2017
• Expiry date: Oct 18, 2033

Classification

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

Abstract

A process for producing short-chain olefins by conversion of oxygenates in a multi-stage fixed-bed reactor, in which the individual stages for reaction zones are covered with beds of a granular, form-selective zeolite catalyst and the feed mixture containing oxygenates is added distributed over the reaction stages. An increase of the availability of the fixed-bed reactor for the olefin production with the same or an increased yield of short-chain olefins is achieved in that one or more reaction zones are charged with a distinctly reduced mass flow of the feed mixture containing oxygenates, wherein the reduced mass flow fraction is distributed over other reaction zones.