Patent ID: 9611236
Date: 2017-04-04
CPC Classifications: C07D,Y02P

Claim:
1. A method for producing ethylene oxide comprising: supplying an ethylene oxide-containing reaction product gas produced in an ethylene oxidation reaction step, in which ethylene is subjected to catalytic gas phase oxidation using a molecular oxygen-containing gas in the presence of a silver catalyst, to an ethylene oxide absorption column; bringing the reaction product gas into contact with an absorption liquid supplied to the ethylene oxide absorption column; supplying an ethylene oxide-containing column bottom liquid of the ethylene oxide absorption column to an ethylene oxide purification system; supplying an ethylene oxide-containing uncondensed gas discharged from the ethylene oxide purification system to an ethylene oxide reabsorption column and circulating the column bottom liquid of the ethylene oxide reabsorption column to the ethylene oxide stripper column, and wherein an operation pressure (column top pressure) of the ethylene oxide reabsorption column is set to 3 to 50 kPa gauge.