Process for the preparation of chloronitroanilines and chloronitrophenols
    103.
    发明授权
    Process for the preparation of chloronitroanilines and chloronitrophenols 失效
    制备氯硝基苯胺和氯硝基苯酚的方法

    公开(公告)号:US4879415A

    公开(公告)日:1989-11-07

    申请号:US129425

    申请日:1987-11-25

    CPC classification number: C07C201/12 C07C209/74

    Abstract: The invention relates to a process for the preparation of chloronitroanilines or chloronitrophenols, which comprises chlorinating nitroanilines or nitrophenols in hydrochloric acid by adding simultaneously separate streams of nitroanilines or nitrophenols and of a chlorinating agent to said hydrochloric acid. The process affords pure products in good yield. An accumulation of chlorine during the reaction is avoided.Chloronitroanilines and chloronitrophenols are useful intermediates for the snythesis of disperse dyes.

    Abstract translation: 本发明涉及一种制备氯硝基苯胺或氯硝基苯酚的方法,其包括通过同时将硝基苯胺或硝基苯酚和氯化剂分别加入到所述盐酸中,在硝酸中氯化硝基苯胺或硝基苯酚。 该方法以高产率提供纯产品。 避免了反应过程中氯的累积。 氯硝基苯胺和氯硝基苯酚是分散染料的有用的中间体。

    Methods for the production and purification of di (nitrophenyl) ethers
    107.
    发明授权
    Methods for the production and purification of di (nitrophenyl) ethers 失效
    二(硝基苯基)醚的生产和纯化方法

    公开(公告)号:US4700011A

    公开(公告)日:1987-10-13

    申请号:US782229

    申请日:1985-09-30

    CPC classification number: C07C201/16 C07C201/12 C07C213/02

    Abstract: Di(nitrophenyl) ethers are prepared by the reaction of a halogeno-nitrophenyl compound with a base wherein the water in the reaction system is removed during the reaction. The reaction can be advantageously carried out at two different temperatures. The use of a molar excess of the halogeno-nitrophenyl compound improves the yield of di(nitrophenyl) ether. Crude di(nitrophenyl) ether is purified by extraction into a non-aqueous solvent using a dual temperature method to maintain the ether in the liquid phase.

    Abstract translation: 二(硝基苯基)醚通过卤代 - 硝基苯基化合物与反应中除去反应体系中的水的碱反应来制备。 反应可以有利地在两个不同的温度下进行。 使用摩尔过量的卤代 - 硝基苯基化合物可提高二(硝基苯基)醚的产率。 粗二(硝基苯基)醚通过使用双温法萃取到非水溶剂中以将乙醚保持在液相中来纯化。

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