发明名称 |
Extractive distn. of hexa:fluoro:propylene epoxide - in presence of chlorinated hydrocarbon or ether solvent to give hexa:fluoro:propylene |
摘要 |
<p>Refining hexafluoropropylen oxide into hexamfluropylene is carried out by extractive distillation in the presence of a solvent selected from chlorinated hydrocarbons having >=2C atoms (except ethane dichloride) and ethers having a branched alkyl whose C number is not 3, the solidifying point of the solvent being not >-20 degrees C., and boiling point is not 0 degrees C. The weight ratio of solvent/hexafluroopropylene epoxide is 1/1-10/1. The distillation is conducted at 1-10 atm. and at -30 degrees C. - +50 degrees C. of the top of the distn. tower, using as the solvent diisopropylether, 1,1,2-trichloroethane or trichloroethylene. The number of distillation stages can be minimised by 20-50%, thus a small size distn. tower may be sufficient.</p> |
申请公布号 |
DE2752998(A1) |
申请公布日期 |
1979.05.31 |
申请号 |
DE19772752998 |
申请日期 |
1977.11.28 |
申请人 |
ASAHI GLASS CO.LTD. |
发明人 |
ODA,YOSHIO;UCHIDA,KEIICHI;MORIKAWA,SHINSUKE;YOKOHAMA,KANAGAWA |
分类号 |
C07D303/48;(IPC1-7):C07D303/08 |
主分类号 |
C07D303/48 |
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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