Process for the dissociation of MTBE

US7910786B2 · kind B2 · utility

Assignee

• Evonik Oxeno GmbH · DE

Inventors

• Markus Winterberg · Waltrop, DE
• Walter Luh · Marl, DE
• Silvia Santiago Fernandez · Oviedo, ES
• Franz Nierlich · Marl, DE
• Stephan Houbrechts · Duffel, BE
• Dietrich Maschmeyer · Recklinghausen, DE
• Horst-Werner Zanthoff · Neheim, DE
• Wilfried Buschken · Haltern am See, DE

Key dates

• Filing date: Aug 16, 2007
• Grant date: Mar 22, 2011
• Expiry date: Oct 8, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C41/42
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Isobutene is prepared by a process in which a) an MTBE-containing stream I is separated by distillation into an MTBE-containing overhead stream II and a bottom stream III which comprises compounds having boiling points higher than that of MTBE; and b) the MTBE present in the overhead stream II is dissociated over a catalyst to give a dissociation product IV; wherein the stream I has a proportion of 2-methoxybutane (MSBE) of greater than 1000 ppm by mass, based on MTBE, and wherein the separation by distillation in step a) and/or the dissociation in step b) is carried out so that the dissociation product IV has a concentration of less than 1000 ppm by mass of linear butenes, based on a C4-olefin fraction.