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. 03, 2014
Filed:
Dec. 02, 2011
Martin Lysle Hess, Fulshear, TX (US);
Wayne Errol Evans, Houston, TX (US);
Jeffery Michael Kobe, Houston, TX (US);
Marek Matusz, Houston, TX (US);
Martin Lysle Hess, Fulshear, TX (US);
Wayne Errol Evans, Houston, TX (US);
Jeffery Michael Kobe, Houston, TX (US);
Marek Matusz, Houston, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
The present invention relates to a process for improving the overall selectivity of an EO process for converting ethylene to ethylene oxide utilizing a highly selective EO silver catalyst containing a rhenium promoter wherein following normal operation a hard strip of the chloride on the surface of the catalyst is conducted in order to remove a portion of the chlorides on the surface of the catalyst. Following the hard strip, the catalyst is optionally re-optimized. Surprisingly, it has been found that the selectivity of the catalyst following the hard strip may be substantially higher than the selectivity prior to the hard strip.