METHOD FOR PRODUCING ETHYLENE OXIDE

[Task] To provide a method for producing ethylene oxide capable of reducing the emission amount of carbon dioxide.[Solution] A method for producing ethylene oxide includes: an ethylene oxide generation step 1 in which a first mixture containing ethylene oxide is obtained by causing ethylene and oxygen to react in presence of a diluent gas; a gas-liquid separation step 2 in which the first mixture is gas-liquid separated into a second mixture containing ethylene, oxygen, and carbon dioxide and a third mixture containing ethylene oxide and water; a carbon dioxide separation step 3 in which carbon dioxide is separated from the second mixture; and an electrolytic reduction step 4 in which the carbon dioxide is electrolytically reduced to obtain a fourth mixture containing ethylene, methane, and carbon dioxide and to obtain oxygen. In the carbon dioxide separation step, carbon dioxide is separated from the fourth mixture. In the ethylene oxide generation step, the second mixture and the fourth mixture, from which carbon dioxide has been removed, and the oxygen obtained in the electrolytic reduction step are used as raw material and a diluent gas.