发明授权
- 专利标题: Purification of 4-fluoro-4'-hydroxybenzophenone
- 专利标题(中): 4-氟-4'-羟基二苯甲酮的纯化
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申请号: US733362申请日: 1985-05-13
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公开(公告)号: US4612399A公开(公告)日: 1986-09-16
- 发明人: Howard M. Colquhoun , David F. Lewis
- 申请人: Howard M. Colquhoun , David F. Lewis
- 申请人地址: GB2 London
- 专利权人: Imperial Chemical Industries PLC
- 当前专利权人: Imperial Chemical Industries PLC
- 当前专利权人地址: GB2 London
- 优先权: GBX8413314 19840524
- 主分类号: C07C45/00
- IPC分类号: C07C45/00 ; C07C45/46 ; C07C45/79 ; C07C45/81 ; C07C49/83 ; C07C67/00
摘要:
A mixture of isomers of fluoro-4'-hydroxybenzophenone are dissolved in an aqueous solution of a base, for example sodium hydroxide, and sufficient acid is added to reduce the pH to not less than 9 and to precipitate 4-fluoro-4'-hydroxybenzophenone having a reduced proportion of other isomers.
公开/授权文献
- US5735764A Hydraulic coupling for vehicle drivetrain 公开/授权日:1998-04-07
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