发明申请
- 专利标题: Method for producing 3-hydroxy-2-methylbenzoic acid
- 专利标题(中): 3-羟基-2-甲基苯甲酸的制备方法
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申请号: US10507875申请日: 2003-03-10
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公开(公告)号: US20050222455A1公开(公告)日: 2005-10-06
- 发明人: Friedrich Muller-Hauck , Johannes Scherer , Gerhard Schroeder , Horst Behre
- 申请人: Friedrich Muller-Hauck , Johannes Scherer , Gerhard Schroeder , Horst Behre
- 申请人地址: DE Leverkusen
- 专利权人: Bayer Chemicals AG
- 当前专利权人: Bayer Chemicals AG
- 当前专利权人地址: DE Leverkusen
- 优先权: DE10212885.5 20020322
- 国际申请: PCT/EP03/02415 WO 20030310
- 主分类号: C07C51/31
- IPC分类号: C07C51/31 ; C07C65/21 ; C07C67/08 ; C07C69/157 ; C07C303/06 ; C07C309/35 ; C07C51/16 ; C07C51/255
摘要:
The invention relates to a method for producing 3-hydroxy-2-methylbenzoic acid or solutions containing salts of 3-hydroxy-2-methylbenzoic acid, with naphthalene as the starting substance. Said method essentially comprises the following steps: sulfonation, reaction with alkalis at high temperatures and the expedient preparation of the resultant reaction mixture.
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