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:
Jun. 26, 2007
Filed:
Jun. 17, 2004
Gerda Grund, Duelmen, DE;
Wilfried Bueschken, Haltern am See, DE;
Dieter Reusch, Marl, DE;
Andreas Beckmann, Recklinghausen, DE;
Gerda Grund, Duelmen, DE;
Wilfried Bueschken, Haltern am See, DE;
Dieter Reusch, Marl, DE;
Andreas Beckmann, Recklinghausen, DE;
Oxeno Olefinchemie GmbH, Marl, DE;
Abstract
Isobutene is prepared by dissociating tert-butanol into isobutene and water over an acid ion-exchange resin arranged as a fixed bed in at least one reactor at a temperature of from 80 to 150° C. and at a pressure of from 5 to 25 bar to obtain a reaction mixture, separating the reaction mixture into isobutene, a by-product, water and at least one mixture of undissociated tert-butanol and water. The reactor is operated pseudo-isothermally, with a temperature difference between inflowing and outflowing streams of less than 15 K.