Process of preparing para substituted phenylamines
    1.
    发明授权
    Process of preparing para substituted phenylamines 失效
    制备对位取代的苯胺的方法

    公开(公告)号:US5574187A

    公开(公告)日:1996-11-12

    申请号:US318927

    申请日:1994-10-06

    IPC分类号: C07C209/68 C07C209/02

    CPC分类号: C07C209/68

    摘要: Processes of preparing para substituted phenylamines, such as, p-phenylenediamines, and particularly, p-aminodiphenylamine. One process involves contacting phenylhydroxylamine with a nucleophilic reagent, such as aniline, in specified proportions and within a specified temperature range, in the absence of oxygen, and in the presence of a homogeneous acid catalyst, such as hydrochloric acid. A second process involves contacting phenylhydroxylamine with a nucleophilic reagent, such as aniline, in the presence of a solid acid catalyst, such as acidic zeolite Y, under reaction conditions.

    摘要翻译: 制备对位取代的苯胺的方法,如对苯二胺,特别是对氨基二苯胺。 一个方法包括在不存在氧的情况下,在均相酸催化剂如盐酸的存在下,以规定的比例和规定的温度范围内将苯基羟胺与亲核试剂如苯胺接触。 第二个过程包括在反应条件下,在固体酸催化剂如酸性沸石Y的存在下使苯基羟胺与亲核试剂如苯胺接触。

    Process of preparing para phenylamines
    2.
    发明授权
    Process of preparing para phenylamines 失效
    对苯胺的制备方法

    公开(公告)号:US5420354A

    公开(公告)日:1995-05-30

    申请号:US318928

    申请日:1994-10-06

    IPC分类号: C07C209/36

    CPC分类号: C07C209/36

    摘要: A process of preparing para phenylenediamines, such as, p-aminodiphenylamine. The process involves contacting nitrobenzene or a substituted derivative thereof with hydrogen and an amine, such as aniline, in the presence of a hydrogenation catalyst, a hydrogenation inhibitor, and an acid cocatalyst under reaction conditions.

    摘要翻译: 对苯二胺的制备方法,如对氨基二苯胺。 该方法包括在反应条件下,在氢化催化剂,氢化抑制剂和酸性助催化剂的存在下,将硝基苯或其取代的衍生物与氢气和胺如苯胺接触。

    Process for preparing para-phenylenediamine derivatives
    3.
    发明授权
    Process for preparing para-phenylenediamine derivatives 失效
    对苯二胺衍生物的制备方法

    公开(公告)号:US5840982A

    公开(公告)日:1998-11-24

    申请号:US090600

    申请日:1998-06-04

    CPC分类号: C07C209/38 C07C209/36

    摘要: An improvement in a process for the preparation of a p-aminodiarylamine by reduction of the corresponding nitroso or nitro compound with hydrogen in a hydrogenator in the presence of a catalyst is disclosed. The invention includes equipping the hydrogenator with filtration means capable of separating the p-aminodiarylamine product from the catalyst, whereby the p-aminodiarylamine product can be removed from the hydrogenator while the catalyst is retained therein, thereby permitting the reaction to be run semicontinuously or continuously.

    摘要翻译: 公开了通过在氢化器中在催化剂存在下用氢还原相应的亚硝基或硝基化合物来制备对氨基二芳基胺的方法的改进。 本发明包括将氢化器装配成能够从催化剂中分离出对氨基二芳基胺产物的过滤装置,由此在将催化剂保留在其中的同时可将氢氧化铝上的对氨基二芳基胺产物除去,从而允许反应半连续或连续地进行 。