发明名称 |
Process for purifying difluoromethane |
摘要 |
<p>A process for purifying difluoromethane, which comprises subjecting a mixture comprising difluoromethane and hydrogen fluoride to extraction treatment with at least one extractant selected from the following (a) and (b) to separate it by liquid separation into an extractant layer comprising the difluoromethane and the extractant as the main components, and a hydrogen fluoride layer comprising the hydrogen fluoride as the main component, and separating the difluoromethane from the extractant layer: (a) Dichloromethane (b) Chlorofluoromethane.omp</p> |
申请公布号 |
EP1127863(A1) |
申请公布日期 |
2001.08.29 |
申请号 |
EP20010103558 |
申请日期 |
2001.02.19 |
申请人 |
ASAHI GLASS COMPANY LTD. |
发明人 |
YOKOYAMA, TAKAAKI;YANASE, KOICHI;SUZUKI, YASUHIRO |
分类号 |
C07C17/38;C07C19/08;(IPC1-7):C07C17/38;C07C17/20 |
主分类号 |
C07C17/38 |
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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