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605 条记录 (耗时 0.019 秒)

    Process for preparing 1-chloro-2,4-diaminobenzene
    61.
    发明授权
    Process for preparing 1-chloro-2,4-diaminobenzene 失效
    1-氯-2,4-二氨基苯的制备方法

    公开(公告)号：US6034276A

    公开(公告)日：2000-03-07

    申请号：US274464

    申请日：1999-03-22

    申请人： Robert Joseph Maleski ,  Edward Tipton Mullins

    发明人： Robert Joseph Maleski ,  Edward Tipton Mullins

    IPC分类号： B01J25/02 ,  C07B61/00 ,  C07C209/36 ,  C07C211/52 ,  C07C209/00

    CPC分类号： C07C209/365

    摘要： Disclosed is an improved process for preparing 1-chloro-2,4-diaminobenzene by the selective hydrogenation of 1-chloro-2,4-dinitro-benzene wherein the hydrogenation is carried out in the presence of a modified Raney nickel catalyst containing about 70 to 95 weight percent nickel, about 4 to 10 weight percent aluminum, about 0.1 to 4 weight percent molybdenum, and from 0 to about 20 weight percent cobalt. The 1-chloro-2,4-diaminobenzene is useful as an intermediate for disperse dyes and for color photography.

    摘要翻译： 公开了通过1-氯-2,4-二硝基苯的选择性氢化制备1-氯-2,4-二氨基苯的改进方法，其中氢化在含有约70的改性阮内镍催化剂存在下进行 至95重量％的镍，约4至10重量％的铝，约0.1至4重量％的钼和0至约20重量％的钴。 1-氯-2,4-二氨基苯可用作分散染料和彩色摄影的中间体。

    Method for producing bis(3-amino-4-hydroxyphenyl) compounds
    63.
    发明授权
    Method for producing bis(3-amino-4-hydroxyphenyl) compounds 失效
    双（3-氨基-4-羟基苯基）化合物的制备方法

    公开(公告)号：US5977413A

    公开(公告)日：1999-11-02

    申请号：US124202

    申请日：1998-07-28

    申请人： Jun-ichiro Tomaru ,  Kenji Kunikata ,  Masaki Fujimoto

    发明人： Jun-ichiro Tomaru ,  Kenji Kunikata ,  Masaki Fujimoto

    IPC分类号： C07C213/02 ,  C07C215/80 ,  C07C209/36

    CPC分类号： C07C215/80 ,  C07C213/02

    摘要： Disclosed is a method for producing bis(3-amino-4-hydroxyphenyl) compounds, which comprises reducing bis(3-nitro-4-hydroxyphenyl) compounds with hydrazines in the presence of a catalyst. The method produces bis(3-amino-4-hydroxyphenyl) compounds of high quality under mild conditions at high yields. The products can be isolated and purified in a simple manner to have a higher purity. The method is suitable to industrial-scale production of the products.

    摘要翻译： 公开了一种制备双（3-氨基-4-羟基苯基）化合物的方法，其包括在催化剂存在下用肼还原双（3-硝基-4-羟基苯基）化合物。 该方法以高产率在温和条件下产生高质量的双（3-氨基-4-羟基苯基）化合物。 产品可以以简单的方式分离和纯化，以获得更高的纯度。 该方法适用于工业规模生产的产品。

    Catalytic hydrogeneration of nitrobenzene to 4-aminodiphenylamine in the presence of a hydroxyl compound and a solvent
    64.
    发明授权
    Catalytic hydrogeneration of nitrobenzene to 4-aminodiphenylamine in the presence of a hydroxyl compound and a solvent 失效
    在羟基化合物和溶剂的存在下，将硝基苯催化加氢生成4-氨基二苯胺

    公开(公告)号：US5977411A

    公开(公告)日：1999-11-02

    申请号：US872030

    申请日：1997-06-10

    申请人： Antonio L. DeVera

    发明人： Antonio L. DeVera

    IPC分类号： C07B61/00 ,  C07C209/02 ,  C07C209/36 ,  C07C209/54 ,  C07C211/54 ,  C07C211/55 ,  C07C209/00 ,  C07C211/00

    CPC分类号： C07C209/36 ,  C07C209/02

    摘要： This invention provides a method for preparing 4-ADPA by charging nitrobenzene into a reaction zone under hydrogen pressure in the presence of a strong organic base and a catalyst for hydrogenation. The method provides the convenience and economy of a one-step process, while producing improved yields and selectivities. The invention further provides for various embodiments of the foregoing which are suitable for the production of 4-ADPA, and the hydrogenation or reductive alkylation to produce PPD. Important to the invention are the molar ratios of aniline to nitrobenzene and nitrobenzene to the strong organic base and the choice and use of hydrogenation catalyst.

    摘要翻译： 本发明提供了一种通过在强有机碱和氢化催化剂的存在下在氢气压力下将硝基苯装入反应区中来制备4-ADPA的方法。 该方法提供了一步过程的便利和经济性，同时产生了提高的产量和选择性。 本发明进一步提供了适用于生产4-ADPA和氢化或还原烷基化以产生PPD的上述各种实施方案。 本发明重要的是苯胺与硝基苯和硝基苯与强有机碱的摩尔比以及加氢催化剂的选择和使用。

    Process for the production of optionally substituted 4-aminodiphenylamines
    68.
    发明授权
    Process for the production of optionally substituted 4-aminodiphenylamines 失效
    用于制备任选取代的4-氨基二苯胺的方法

    公开(公告)号：US5739403A

    公开(公告)日：1998-04-14

    申请号：US778838

    申请日：1997-01-06

    申请人： Klaus Reinartz ,  Adolf Brill ,  Fred Schuhmacher

    发明人： Klaus Reinartz ,  Adolf Brill ,  Fred Schuhmacher

    IPC分类号： B01J23/42 ,  C07B61/00 ,  C07C209/36 ,  C07C209/38 ,  C07C209/68 ,  C07C211/54

    CPC分类号： C07C209/38 ,  C07C209/36 ,  C07C209/68

    摘要： 4-Aminodiphenylamines are produced by reacting optionally substituted aniline with optionally substituted nitrobenzene in the presence of water and/or alcohols and organic and/or inorganic bases and then catalytically hydrogenating the resultant nitro- and/or nitrosodiphenylamine in the presence of water, wherein the catalytic hydrogenation of the reaction mixture is performed in the presence of 25 to 80 wt. % of water, relative to the weight of the reaction mixture from the condensation reaction, the hydrogenation catalyst is removed from the hydrogenation mixture once absorption of hydrogen has ceased, 10 to 100 vol. % of aromatic solvent, relative to the total volume of the hydrogenation mixture, are optionally added to the hydrogenation mixture, the resultant organic phase is separated in order to isolate the 4-aminodiphenylamine and the aqueous phase is returned to the initial reaction mixture.

    摘要翻译： 通过在水和/或醇和有机和/或无机碱的存在下使任选取代的苯胺与任选取代的硝基苯反应制备4-氨基二苯胺，然后在水存在下催化氢化所得的硝基和/或亚硝基二苯胺，其中 反应混合物的催化氢化在25〜80wt。 ％的水相对于来自缩合反应的反应混合物的重量，一旦氢的吸收停止，氢化催化剂就从氢化混合物中去除10至100vol。 相对于氢化混合物的总体积，芳族溶剂的％为任意加入到氢化混合物中，分离所得有机相以分离4-氨基二苯胺，并将水相返回至初始反应混合物。