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    • 3. 发明授权
    • Process for the preparation of 1-amine-2-naphthol-4-sulfonic acid
    • 1-胺-2-萘酚-4-磺酸的制备方法
    • US4929752A
    • 1990-05-29
    • US352652
    • 1989-05-12
    • Bernhard AlbrechtJurgen Beyrich
    • Bernhard AlbrechtJurgen Beyrich
    • C07C303/04C07C309/50
    • C07C309/50
    • There is disclosed an improved semi-continuous and continuous process for the preparation of 1-amino-2-naphthol-4-sulfonic acid by nitrosation of 2-naphthol, addition of bisulfite, acidification with mineral acid and reduction of the reaction product so obtained, which comprises charging the reactor with the nitrosating agent and simultaneously adding 2-naphthol and mineral acid simultaneously in separate streams in the semi-continuous process, or charging the reactor with the reaction mass and simultaneously adding 2-naphthol, mineral acid and the nitrosating agent in separate streams in the continuous process. The product can be further used, without isolation, for the synthesis of dyes.
    • 公开了通过2-萘酚亚硝化制备1-氨基-2-萘酚-4-磺酸的改进的半连续和连续方法,加入亚硫酸氢盐,用无机酸酸化并还原所得的反应产物 ,其中包括用硝化剂对反应器进行加料,并在半连续过程中同时在分离的物流中加入2-萘酚和无机酸,或将反应物与反应物料反应,同时加入2-萘酚,无机酸和亚硝化 代理在不同流中的连续过程。 该产品可以进一步使用,无需隔离,用于合成染料。