发明名称 |
Process for the preparation of 1-amino-8-naphthol-3,6-disulphonic acid (H-acid) |
摘要 |
A process has been invented for the preparation of a mono-alkali metal salt of 1-amino-8-naphthol-3,6-disulphonic acid comprising reacting 1-naphthylamine-3,6,8-trisulphonic acid and/or a salt thereof and/or a naphthylamine-trisulphonic acid isomer mixture and/or salt thereof with an alkali metal hydroxide solution at elevated pressure and elevated temperature and in the presence of an alcohol or alcoholate, and separating out the mono-alkali metal salt by acidification. The process results in the procurement of higher yields of the desired product and in the formation of less by-products.
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申请公布号 |
US4178308(A) |
申请公布日期 |
1979.12.11 |
申请号 |
US19780920033 |
申请日期 |
1978.06.28 |
申请人 |
BAYER AG |
发明人 |
BEHRE, HORST;PUTTER, ROLF;SCHOSSLER, WILLI |
分类号 |
C07C309/50;C07C67/00;C07C301/00;C07C303/22;C07C303/32;C22B34/12;H03D13/00;(IPC1-7):C07C143/66 |
主分类号 |
C07C309/50 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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