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Process for starting-up an ethylene oxide reactor

  • US 5,155,242 A
  • Filed: 12/05/1991
  • Issued: 10/13/1992
  • Est. Priority Date: 12/05/1991
  • Status: Expired due to Term
First Claim
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1. A process for starting up a fixed bed ethylene oxide reactor containing a catalyst consisting essentially of silver and one or more alkali metal promoter(s) supported on an alumina carrier, which process comprises:

  • a) heating the reactor to a temperature between about 350°

    F. and 475°

    F.,b) passing an ethylene-containing gas over the catalyst in the reactor,c) adding a chlorohydrocarbon moderator to the gas passing over the catalyst and after an amount of moderator containing the chlorine equivalent found in about 0.1 to about 5 milliliters (basis liquid) of ethyl chloride per cubic foot of the catalyst has been added, thend) adding oxygen to the gas passing over catalyst, and adjusting the reactor temperature and gas flow rates to operating design conditions.

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