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
Wayne Errol Evans, Houston, TX (US);
Marek Matusz, Houston, TX (US);
Paul Michael Mcallister, Houston, TX (US);
Wayne Errol Evans, Houston, TX (US);
Marek Matusz, Houston, TX (US);
Paul Michael McAllister, 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 chloride 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. The chloride strip involves the addition of certain saturated hydrocarbons to the feed. Following the chloride strip, the catalyst is optionally re-optimized.