EPOXIDATION METHOD Russian patent published in 2021 - IPC C07D301/03 C07C29/76 C07D303/04 C07C31/20 

FIELD: chemical or physical processes.

SUBSTANCE: present invention relates to versions of an ethylene oxidation method for producing ethylene oxide. One of the versions of the method includes the following steps: providing an aqueous stream containing ethylene glycol and impurities; introducing said aqueous stream into a first layer of ion-exchange treatment to reduce content of impurities; determining whether the first layer of ion-exchange treatment has a specific electrical conductivity greater than 5 mcm/cm; when determining that output of first layer of ion-exchange treatment has specific electric conductivity of more than 5 mcm/cm, feeding output of first layer of ion-exchange treatment to second layer of ion-exchange treatment; and when determining that output of first layer of ion-exchange treatment has specific electric conductivity from more than 20 to 100 mcm/cm, redirection of water flow to second layer of ion-exchange treatment and regeneration of first ion-exchange layer.

EFFECT: proposed invention allows increasing time between regenerations of ion-exchange layer and thus considerably increasing process efficiency.

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