METHOD OF PURIFYING ETHYLENE CARBONATE, PROCESS FOR PRODUCING PURIFIED ETHYLENE CARBONATE AND ETHYLENE CARBONATE

摘要

Ethylene carbonate in which the content of especially diols has highly been reduced. There is provided a method of purifying ethylene carbonate, including causing crude ethylene carbonate crystal to descend from a superior part of tower, melting the crude ethylene carbonate crystal in a tower bottom, withdrawing portion of the obtained melt from the tower, causing the rest of the melt to ascend as a reflux liquid and realizing countercurrent contact of the melt with the descending crude ethylene carbonate crystal, characterized in that a solid/liquid countercurrent contact region of constant temperature is created.