Patent ID: 6114553
Filing Date: 2000-09-05
Classification: B01J,C07D,Y02P

Abstract:
A method for the production of ethylene oxide, which comprises effecting vapor phase oxidation of ethylene oxide with a molecular oxygen-containing gas in the presence of a silver catalyst by performing vapor phase oxidation of ethylene such that an amount of chlorine suffered to adhere thereto is not more than 2 mol % per mol of silver after the duration of the reaction caused under the following condition has totaled 240 hours from the start of the reaction:(Conditions for vapor phase oxidation)Reaction tube: Made of stainless steel and measuring 25 mm in inside diameter and 6000 mm in lengthAmount of catalyst loaded: 2.2 litersReaction pressure: 15 Kg/cm.sup.2 GReaction temperature: Such a temperature as attains ethylene conversion, 11 mol %Composition of feed gas: Ethylene 20 vol. %, oxygen 8 vol. %, carbon dioxide 7 vol. %, ethane 0.1 vol. %, ethylene dichloride 2.0 ppm, and at least one inert gas selected from among methane, nitrogen, and argonGas hourly space velocity of gas: 6500 hr.sup.-1.