发明名称 |
METHOD OF PURIFYING ETHYLENE CARBONATE, PROCESS FOR PRODUCING PURIFIED ETHYLENE CARBONATE AND ETHYLENE CARBONATE |
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. |
申请公布号 |
EP1997817(A4) |
申请公布日期 |
2010.08.25 |
申请号 |
EP20070736898 |
申请日期 |
2007.03.16 |
申请人 |
MITSUBISHI CHEMICAL CORPORATION;TSUKISHIMA KIKAI CO., LTD. |
发明人 |
YAMAGISHI, MASAHIKO;FURUYA, TOSHIYUKI;SUDA, HIDEKI |
分类号 |
C07D317/38;B01D9/02 |
主分类号 |
C07D317/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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