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:
Jan. 27, 2015
Filed:
Jun. 16, 2010
Markus Winterberg, Datteln, DE;
Dirk Roettger, Cologne, DE;
Armin Rix, Marl, DE;
Reiner Bukohl, Marl, DE;
Walter Luh, Marl, DE;
Holger Wiederhold, Darmstadt, DE;
Gunnar Schilling, Herten, DE;
Christian Boeing, Cologne, DE;
Markus Winterberg, Datteln, DE;
Dirk Roettger, Cologne, DE;
Armin Rix, Marl, DE;
Reiner Bukohl, Marl, DE;
Walter Luh, Marl, DE;
Holger Wiederhold, Darmstadt, DE;
Gunnar Schilling, Herten, DE;
Christian Boeing, Cologne, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
A process for preparing isobutene by dissociation of MTBE, including: a) reaction of isobutene-containing hydrocarbon mixtures, with methanol, present in one or more methanol-containing streams, over acidic ion exchangers to give a stream, containing MTBE and TBA; b) separation of a stream containing MTBE and TBA, from a stream by distillation; c) dissociation of a stream in the gas phase over a heterogeneous catalyst to give a stream containing at least isobutene, methanol, MTBE and water and possibly TBA, d) separation of a stream by distillation to give a stream containing in each case more than 50% by mass of the amounts of methanol, TBA and water present in another stream and a stream containing isobutene, e) separation of water from stream to below 1% by mass by distillation to give a stream, f) total or partial recirculation of the methanol-containing stream.