Process for the selective preparation of meta-chloroanilines
    3.
    发明授权
    Process for the selective preparation of meta-chloroanilines 失效
    选择性制备间氯苯胺的方法

    公开(公告)号:US4418213A

    公开(公告)日:1983-11-29

    申请号:US283151

    申请日:1981-07-14

    CPC分类号: C07C209/74 C07C209/36

    摘要: Process for the selective preparation of meta-chloroanilines.It is carried out by the hydrodechlorination of polychloroanilines or polychloronitrobenzenes with hydrogen, in the liquid phase, under the action of heat, at atmospheric pressure or under pressure, in the presence of a noble metal, in an anhydrous organic medium and in the presence of a Lewis acid.These meta-chloroanilines are intermediates especially for active plant-protection substances.

    摘要翻译: 选择性制备间氯苯胺的方法。 通过在氢气的作用下,在氢气的作用下,在大气压或压力下,在贵金属的存在下,在无水有机介质中和在存在下,在氢气存在下,将氢氯苯酚或聚氯硝基苯与氢气进行加氢脱氯, 路易斯酸。 这些间氯苯胺是特别用于活性植物保护物质的中间体。

    Process for the catalytic hydrogenation of nitriles to amines in the
presence of a catalyst of doped raney nickel type
    4.
    发明授权
    Process for the catalytic hydrogenation of nitriles to amines in the presence of a catalyst of doped raney nickel type 失效
    在掺杂雷尼镍型催化剂存在下将腈催化氢化成胺的方法

    公开(公告)号:US5777166A

    公开(公告)日:1998-07-07

    申请号:US663097

    申请日:1996-11-25

    CPC分类号: C07C209/48

    摘要: The present invention relates to the field of the catalytic reduction of nitriles to amines by use of Raney catalysts doped with one or a number of additional metal elements chosen from the elements of group IVb of the periodic classification. More precisely, it relates to a process for the hydrogenation of nitriles to amines, characterized in that it essentially consists: in selecting a liquid reaction medium which dissolves the nitrile substrate to be hydrogenated, in using at least one inorganic alkali metal or alkaline-earth metal hydroxide base, and in adopting a catalyst whose doping element/Ni ratio by weight is between 0.05 and 10%. More specific application to the hydrogenation of dinitriles to diamines or to aminonitriles.

    摘要翻译: PCT No.PCT / FR94 / 01478 Sec。 371日期:1996年11月25日 102(e)日期1996年11月25日PCT 1994年12月16日PCT公布。 公开号WO95 / 18090 日期1995年7月6日本发明涉及通过使用掺杂有选自周期分类的IVb族元素中的一种或多种另外的金属元素的阮内催化剂将腈催化还原为胺的领域。 更准确地说,本发明涉及一种将腈氢化成胺的方法,其特征在于其主要包括:在使用至少一种无机碱金属或碱土的情况下,选择溶解待氢化的腈底物的液体反应介质 金属氢氧化物碱,并且采用其掺杂元素/ Ni重量比在0.05至10%之间的催化剂。 更具体地应用于将二腈加氢成二胺或氨基腈。

    Process for the preparation of a catalyst for the hydrogenation of
nitriles to amines and use of this catalyst in hydrogenation
    7.
    发明授权
    Process for the preparation of a catalyst for the hydrogenation of nitriles to amines and use of this catalyst in hydrogenation 失效
    制备用于将腈氢化成胺的催化剂的方法,以及在氢化中使用该催化剂

    公开(公告)号:US5801286A

    公开(公告)日:1998-09-01

    申请号:US663098

    申请日:1996-09-23

    摘要: The present invention relates to the field of the catalytic hydrogenation of nitrites to amines and, more particularly, of dinitriles such as adiponitrile (ADN) to diamines such as hexamethylenediamine (HMD). More precisely, the present invention relates to a process for the preparation of a catalyst for the hydrogenation of nitriles to amines of Raney nickel type doped with at least one additional metal element selected from columns IVb, Vb and VIb of the periodic classification. It is targeted at providing an economic and easy-to-implement process which makes it possible to obtain catalysts which are both active and selective with respect to nitrites and stable. The process is characterized in that it consists in suspending Raney nickel in a solution, preferably an acid solution, of the additional metal element.

    摘要翻译: PCT No.PCT / FR94 / 01477 Sec。 371日期1996年9月23日 102(e)1996年9月23日PCT 1994年12月16日PCT公布。 公开号WO95 / 17960 日期1995年7月6日本发明涉及亚硝酸盐对胺的催化氢化领域,更具体地涉及二腈如己二腈(ADN)与二胺如六亚甲基二胺(HMD)的催化氢化领域。 更确切地说,本发明涉及一种制备用于将腈水解成阮内镍型胺的催化剂的方法,该催化剂掺杂有选自周期分类的第IVb,Vb和VIb列的至少一种另外的金属元素。 其目的在于提供经济和易于实施的方法,使得可以获得相对于亚硝酸盐而言是活性的和选择性的催化剂并且是稳定的。 该方法的特征在于其包括将阮内镍悬浮在附加金属元素的溶液中,优选酸溶液中。