Removal of water from reaction mixtures
    2.
    发明授权
    Removal of water from reaction mixtures 失效
    从反应混合物中除去水

    公开(公告)号:US5976324A

    公开(公告)日:1999-11-02

    申请号:US946482

    申请日:1997-10-07

    摘要: A process as been found for the removal of water from reaction mixtures of acids or acid anhydrides or of aqueous alkali metal hydroxide solutions with alcohols using vapor permeation/pervaporation at the boiling point of the reaction mixture, which includes initially introducing the lowest-boiling educt in less than the stoichiometric amount, based on the other particular educt, together with this other educt, heating the reaction mixture to the boiling point and freeing the vapor mixture, which is formed from the boiling reaction mixture and includes chiefly water and the lowest-boiling component, from water on a membrane, recycling the vapor mixture which has been freed from water into the reaction mixture and topping up the reaction mixture with the lowest-boiling educt in the course of the reaction.

    摘要翻译: 已经发现,在反应混合物的沸点下使用蒸气渗透/渗透蒸发从酸或酸酐或碱金属氢氧化物水溶液与醇的反应混合物中除去水的方法,其中包括最初引入最低沸点的 以其他特定的离子出口为基础,以其它特定的离子出口为基础,加上反应混合物至沸点并释放由沸腾反应混合物形成的蒸气混合物,主要包括水和最低浓度的水, 沸腾组分,从膜上的水,将已经从水中除去的蒸气混合物再循环到反应混合物中,并在反应过程中用最低沸点的水溶液填充反应混合物。

    Process for the preparation of
1-benzoylamino-8-hydroxynaphthalene-4,6-disulphonic acid (benzoyl-K
acid)
    4.
    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%。

    Preparation of arylsulphonium salts
    6.
    发明授权
    Preparation of arylsulphonium salts 失效
    芳基锍盐的制备

    公开(公告)号:US4120866A

    公开(公告)日:1978-10-17

    申请号:US833927

    申请日:1977-09-16

    申请人: Adolf Winkler

    发明人: Adolf Winkler

    摘要: A process for the production of an arylsulphonium salt, comprising reacting an aromatic compound of the formulaAr--Hin which Ar is an aromatic radical with a sulphoxide of the formula ##STR1## in which R.sup.1 and R.sup.2 each independently is an aliphatic or aromatic radical or, together, a divalent radical, in the presence of hydrogen fluoride. The products are known and can be converted to arylthioethers which are intermediates for other known syntheses.

    摘要翻译: 一种制备芳基锍盐的方法,包括使Ar为芳族自由基的式Ar-H的芳族化合物与式(ⅩⅧ)的亚砜反应,其中R 1和R 2各自独立地为脂族或芳族基团 或者在氟化氢的存在下一起形成二价基团。 产物是已知的并且可以转化为作为其它已知合成的中间体的芳硫醚。