Process and plant for producing olefins from oxygenates

• Main Authors: Gorny, Martin, Pohl, Sven, Trabold, Peter, Rothamel, Martin, Castillo-Welter, Frank, Haag, Stephane
• Format: Patent
• Language: English
• Published: 26.02.2019
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR RELEVANT APPARATUS; TRANSPORTING

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).