发明授权
- 专利标题： Process for the preparation of nitronaphthalene-sulphonic acids
- 专利标题（中）： 制备硝基萘磺酸的方法
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申请号： US265271申请日： 1981-05-20
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公开(公告)号： US4534905A公开(公告)日： 1985-08-13
- 发明人: Horst Behre , Heinz U. Blank , Gerhard Burmeister , Otto Lindner
- 申请人： Horst Behre , Heinz U. Blank , Gerhard Burmeister , Otto Lindner
- 申请人地址： DEX Leverkusen
- 专利权人： Bayer Aktiengesellschaft
- 当前专利权人： Bayer Aktiengesellschaft
- 当前专利权人地址： DEX Leverkusen
- 优先权： DEX3020441 19800529
- 主分类号： C07C309/40
- IPC分类号： C07C309/40 ; C07C67/00 ; C07C301/00 ; C07C303/22 ; C07C143/24
摘要：
Improved process for the preparation of nitronaphthalene-sulphonic acids by reacting the corresponding naphthalene-sulphonic acids with nitric acid and working up the nitration mixture, characterized by the features that the reaction of the naphthalene-sulphonic acids with nitric acid is already interrupted before the nitration reaction has ended and that the nitration mixture is treated, optionally after dilution with water, with bases at a pH value of 5 to 14.
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