发明授权
- 专利标题： Process for producing substituted phthalic acid compounds
- 专利标题（中）： 制备取代邻苯二甲酸化合物的方法
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申请号： US641729申请日： 1984-08-17
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公开(公告)号： US4684737A公开(公告)日： 1987-08-04
- 发明人: Hiroshi Horino , Michiro Ohnaka , Atsushi Hayashi , Yoshiko Ikeno
- 申请人： Hiroshi Horino , Michiro Ohnaka , Atsushi Hayashi , Yoshiko Ikeno
- 申请人地址： JPX Tokyo
- 专利权人： Nippon Zeon Co., Ltd.
- 当前专利权人： Nippon Zeon Co., Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX58-151158 19830819
- 主分类号： C07D307/89
- IPC分类号： C07D307/89 ; C07C51/00 ; C07C51/377 ; C07C63/15 ; C07C63/16 ; C07C67/00 ; C07C51/305 ; C07C67/28
摘要：
A process for producing a substituted phthalic acid which comprises heating a substituted tetrahydrophthalic acid compound having a substituent in at least one of the 3-, 4-, 5- and 6-positions in the presence of sulfur to dehydrogenate it, and heat-treating the product in the presence of water optionally together with an organic solvent. As required, the heat-treated product is dehydrocyclized to form a substituted phthalic acid anhydride.
公开/授权文献
- US5140846A Pneumatic measurement apparatus 公开/授权日：1992-08-25
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