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:
Oct. 17, 1989
Filed:
Jul. 25, 1988
Ann M Lauritzen, Houston, TX (US);
David S Baker, Sugarland, TX (US);
Margot H Christiansen, Houston, TX (US);
Beamon M Johnson, Brookshire, TX (US);
John G Schuren, Houston, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
This invention relates to a process for starting up a fixed bed ethylene oxide reactor containing a catalyst comprising silver, alkali metal promoter and rhenium co-promoters supported on an alumina carrier which process comprises heating the reactor to slightly below normal operating conditions, passing an ethylene containing gas over the catalyst at a flow rate of about 20% of design, adding a chlorohydrocarbon moderator to the gas passing over the catalyst and after approximately 1 cubic centimeters of moderator (basis liquid) per cubic foot of catalyst has been added, then adding oxygen to the gas passing over the catalyst to initiate the ethylene oxidation reaction and subsequently raising the reactor temperature and gas flow rates to operating conditions.