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:
Nov. 12, 2013
Filed:
Jun. 09, 2010
Georg Seeber, Lambsheim, DE;
Torsten Mäurer, Lambsheim, DE;
Gerhard Theis, Maxdorf, DE;
Dieter Köffer, Birkenau, DE;
Frank Rosowski, Mannheim, DE;
Georg Seeber, Lambsheim, DE;
Torsten Mäurer, Lambsheim, DE;
Gerhard Theis, Maxdorf, DE;
Dieter Köffer, Birkenau, DE;
Frank Rosowski, Mannheim, DE;
Other;
Abstract
The present invention relates to a process for preparing ethylene oxide by reaction of ethylene with oxygen in the presence of at least one silver-comprising catalyst, wherein the reaction takes place in a reactor which has a catalyst packed bed having at least two zones (i) and (ii) and the silver content of the catalyst in zone (i) is lower than the silver content of the catalyst in zone (ii). The catalyst packed bed preferably has a further zone (a) with which the reaction mixture comes into contact before the zones (i) and (ii). According to the invention, the silver content of the catalyst in the zone (a) is higher than the silver content of the catalyst in zone (i).