The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 2011
Filed:
Aug. 16, 2007
Markus Winterberg, Datteln, 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, Mülheim a.d. Ruhr, DE;
Wilfried Büschken, Haltern am See, DE;
Markus Winterberg, Datteln, 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, Mülheim a.d. Ruhr, DE;
Wilfried Büschken, Haltern am See, DE;
Evonik Oxeno GmbH, Marl, DE;
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 C-olefin fraction.