发明公开
- 专利标题: VERFAHREN ZUR REINIGUNG VON PHTHALID
- 专利标题(英): Process for purifying phthalide
- 专利标题(中): 程序对清洁酞
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申请号: EP97927174.0申请日: 1997-06-12
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公开(公告)号: EP0907645A1公开(公告)日: 1999-04-14
- 发明人: REIF, Wolfgang , MASSONNE, Klemens , NEUHAUSER, Horst
- 申请人: BASF AKTIENGESELLSCHAFT
- 申请人地址: 67056 Ludwigshafen DE
- 专利权人: BASF AKTIENGESELLSCHAFT
- 当前专利权人: BASF AKTIENGESELLSCHAFT
- 当前专利权人地址: 67056 Ludwigshafen DE
- 代理机构: Fitzner, Uwe, Dr.
- 优先权: DE19961025693 19960627
- 国际公布: WO1998000417 19980108
- 主分类号: C07D307
- IPC分类号: C07D307
摘要:
The present invention relates to a process for purifying phthalide contamined with carboxylic acids and/or their derivatives, in which polyethyene glycol and/or polypropylene glycol is added to the phthalide to be purified and then subjected to fractional distillation.
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