发明公开
- 专利标题： Process for preparing aromatic polycarboxylic acids
- 专利标题（中）： 制备芳族聚羧酸的方法
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申请号： EP90307197.5申请日： 1990-07-02
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公开(公告)号： EP0409437A3公开(公告)日： 1992-03-25
- 发明人: Yoshida, Kazuo , Okubo, Nobuyuki , Matsuda, Toshiharu , Konai, Yutaka
- 申请人： KUREHA KAGAKU KOGYO KABUSHIKI KAISHA
- 申请人地址： 1-9-11, Nihonbashi, Horidome-cho Chuo-ku Tokyo 103 JP
- 专利权人： KUREHA KAGAKU KOGYO KABUSHIKI KAISHA
- 当前专利权人： KUREHA KAGAKU KOGYO KABUSHIKI KAISHA
- 当前专利权人地址： 1-9-11, Nihonbashi, Horidome-cho Chuo-ku Tokyo 103 JP
- 代理机构： Perry, Robert Edward
- 优先权： JP186062/89 19890720
- 主分类号： C07C63/331
- IPC分类号： C07C63/331 ; C07C63/333 ; C07C63/307 ; C07C51/255 ; C07C51/265
摘要：
A process for preparing aromatic polycarboxylic acids comprises oxidising a benzil derivative with molecular oxygen in the presence of a Co or Mn oxidation catalyst and a bromine catalyst, in a solvent containing at least 50 wt% of an aliphatic monocarboxylic acid having up to 3 C atoms. 4,4′-Bis(4-alkylphenyl)benzils (wherein alkyl is methyl, ethyl or isopropyl) are novel compounds.
公开/授权文献
- EP0409437B1 Process for preparing aromatic polycarboxylic acids 公开/授权日：1994-09-21
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