Process for the preparation of
1-benzoylamino-8-hydroxynaphthalene-4,6-disulphonic acid (benzoyl-K
acid)
    9.
    发明授权
    Process for the preparation of 1-benzoylamino-8-hydroxynaphthalene-4,6-disulphonic acid (benzoyl-K acid) 失效
    制备1-苯甲酰基氨基-8-羟基萘-4,6-二磺酸(苯甲酰基-K-酸)的方法

    公开(公告)号:US4426333A

    公开(公告)日:1984-01-17

    申请号:US371386

    申请日:1982-04-23

    CPC分类号: C07C303/06

    摘要: The invention relates to a process for the preparation of 1-benzoylamino-8-hydroxynaphthalene-4,6-disulphonic acid (benzoyl-K acid) by reacting 1-amino-8-hydroxynaphthalene-4,6-disulphonic acid (K acid) with benzoylating agents, according to which process mixtures of aminonaphtholdisulphonic acid isomers are used instead of pure K acid, which mixtures contain over 40% by weight of K acid, relative to the total amount of diazotizable compounds in the mixture of isomers, and in which no other single isomer has a proportion which exceeds 10% by weight of the total amount of diazotizable compounds in the mixture of isomers.

    摘要翻译: 本发明涉及通过1-氨基-8-羟基萘-4,6-二磺酸(K酸)的制备1-苯甲酰基氨基-8-羟基萘-4,6-二磺酸(苯甲酰基-K酸)的方法, 使用苯甲酰化剂,根据该方法,使用氨基十氢二磺酸异构体的混合物代替纯K酸,该混合物含有超过40重量%的K酸,相对于异构体混合物中的重氮化化合物的总量,其中 没有其他单一异构体的比例超过异构体混合物中可重氮化合物总量的10重量%。