发明授权
US3954840A 1,3,5,7-Naphthalenetetracarboxylic acids and process for preparation
thereof
失效
1,3,5,7-萘四羧酸及其制备方法
- 专利标题: 1,3,5,7-Naphthalenetetracarboxylic acids and process for preparation thereof
- 专利标题(中): 1,3,5,7-萘四羧酸及其制备方法
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申请号: US441626申请日: 1974-02-11
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公开(公告)号: US3954840A公开(公告)日: 1976-05-04
- 发明人: Gentaro Yamashita , Yasushi Tsuru , Kiyoshi Yamamoto , Moriharu Yamamoto , Nobuo Sakaiya , Toshihiro Aoyama , Tadao Komoriya
- 申请人: Gentaro Yamashita , Yasushi Tsuru , Kiyoshi Yamamoto , Moriharu Yamamoto , Nobuo Sakaiya , Toshihiro Aoyama , Tadao Komoriya
- 申请人地址: JA Osaka
- 专利权人: Teijin Ltd.
- 当前专利权人: Teijin Ltd.
- 当前专利权人地址: JA Osaka
- 优先权: JA48-17420 19730214; JA48-17894 19730215; JA48-25399 19730303; JA48-25400 19730303; JA48-30872 19730319; JA48-30873 19730319; JA48-35035 19730329
- 主分类号: C07C63/40
- IPC分类号: C07C63/40 ; C08G63/54 ; C07C69/76
摘要:
A novel 1,3,5,7-naphthalenetetracarboxylic acid, an alkali salt thereof, or an ester thereof, and a novel process for preparation thereof, and method of effective purification thereof.
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