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. 13, 1992
Filed:
Dec. 05, 1991
Pettai K Shankar, Sugarland, TX (US);
Jitendra G Patel, Katy, TX (US);
Beamon M Johnson, Brookshire, 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 supported silver catalyst promoted with one or more alkali metal promoter(s) which involves heating the reactor to slightly below normal operating conditions, passing an ethylene containing gas over the catalyst, adding a chlorohydrocarbon moderator to the gas passing over the catalyst and after approximately 0.1-5 milliliters 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.