发明公开
EP1591435A2 Method for preparing 2,6-Naphtalene dicarboxyclic acid
审中-公开
Verfahren zur Herstellung von萘-2,6-Dicarbonsaure
- 专利标题： Method for preparing 2,6-Naphtalene dicarboxyclic acid
- 专利标题（中）： Verfahren zur Herstellung von萘-2,6-Dicarbonsaure
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申请号： EP05006639.8申请日： 2005-03-24
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公开(公告)号： EP1591435A2公开(公告)日： 2005-11-02
- 发明人: Kitayama, Masaya , Wakamori, Hiroyuki
- 申请人： Kabushiki Kaisha Ueno Seiyaku Oyo Kenkyujo
- 申请人地址： 4-8, Koraibashi 2-chome, Chuo-ku Osaka-shi, Osaka-fu JP
- 专利权人： Kabushiki Kaisha Ueno Seiyaku Oyo Kenkyujo
- 当前专利权人： Kabushiki Kaisha Ueno Seiyaku Oyo Kenkyujo
- 当前专利权人地址： 4-8, Koraibashi 2-chome, Chuo-ku Osaka-shi, Osaka-fu JP
- 代理机构： Albrecht, Thomas
- 优先权： JP2004092491 20040326; JP2004092501 20040326; JP2004092510 20040326
- 主分类号： C07C51/09
- IPC分类号： C07C51/09 ; C07C63/38
摘要：
Disclosed is an improved method for preparing 2,6-naphthalene dicarboxylic acid from di-lower alkyl 2,6-naphthalene dicarboxylate, which is characterized in that hydrolyzing di-lower alkyl 2,6-naphthalene dicarboxylate in a specified amount of water in the presence of specified amount of hydrophobic organic solvent and an additive; that hydrolyzing di-lower alkyl 2,6-naphthalene dicarboxylate in a specific amount of a mixed solvent of non-water miscible alcohol and water; or in that di-lower alkyl 2,6-naphthalene dicarboxylate is hydrolyzed in two steps wherein the 1st step comprises hydrolyzing said ester in a water miscible organic solvent in the presence of a small amount of water, and the 2nd step comprises further hydrolyzing the reaction.
公开/授权文献
- EP1591435A3 Method for preparing 2,6-Naphtalene dicarboxyclic acid 公开/授权日：2007-11-28
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