- 专利标题： Purification method and production method of difluoromethyl-1, 2, 2, 2-tetrafluoroethyl ether
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申请号： US16955598申请日： 2018-10-26
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公开(公告)号： US10899692B2公开(公告)日： 2021-01-26
- 发明人: Eri Nishizawa , Shinya Akiba
- 申请人： Central Glass Company, Limited
- 申请人地址： JP Ube
- 专利权人： Central Glass Company, Limited
- 当前专利权人： Central Glass Company, Limited
- 当前专利权人地址： JP Ube
- 代理机构： Crowell & Moring LLP
- 优先权： JP2017-246631 20171222
- 国际申请： PCT/JP2018/039795 WO 20181026
- 国际公布： WO2019/123834 WO 20190627
- 主分类号： C07C41/38
- IPC分类号： C07C41/38 ; C07C41/44 ; C07C43/12 ; C07C41/22 ; C07C45/63 ; C07C41/01 ; B01J27/24
摘要：
A purification method of desflurane (difluoromethyl-1,2,2,2-tetrafluoroethyl ether of the formula (1)) includes bringing a mixture containing desflurane and a trihalomethane into contact with a base in the presence of a phase transfer catalyst, thereby decomposing the trihalomethane. By this method, only the trihalometane contained as a by-product in the desflurane is decomposed without causing decomposition of the desflurane, whereby the desflurane is obtained with high purity.
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