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Method of purifying ethylene carbonate, process for producing purified ethylene carbonate and ethylene carbonate
Method of purifying ethylene carbonate, process for producing purified ethylene carbonate and ethylene carbonate
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机译:纯化碳酸亚乙酯的方法,生产纯化的碳酸亚乙酯和碳酸亚乙酯的方法
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摘要
Ethylene carbonate having a highly reduced content of especially diols is provided. A process for purifying ethylene carbonate, including falling crude ethylene carbonate crystals from an upper portion of a tower, melting the crude ethylene carbonate crystal in a bottom portion of the tower, withdrawing a part of the obtained melt from the tower, and flowing the remainder of the obtained melt as a reflux liquid upward for countercurrent contact with the falling crude ethylene carbonate crystals, characterized in that a solid-liquid countercurrent contact region maintained at a constant temperature is formed.
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