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    Process for preparing 4-aminodiphenylamine
    1.
    发明申请
    Process for preparing 4-aminodiphenylamine 有权
    制备4-氨基二苯胺的方法

    公开(公告)号：US20050065376A1

    公开(公告)日：2005-03-24

    申请号：US10882677

    申请日：2004-07-02

    申请人： Nongyue Wang ,  Ruibiao Yu ,  Xiaohui Mao ,  Xiaogen Feng ,  Qianwen Cheng

    发明人： Nongyue Wang ,  Ruibiao Yu ,  Xiaohui Mao ,  Xiaogen Feng ,  Qianwen Cheng

    IPC分类号： C07C209/86 ,  C07C209/36 ,  C07C209/60 ,  C07C209/82 ,  C07C211/55 ,  C07C29/36

    CPC分类号： C07C211/55 ,  C07C209/36 ,  C07C209/60 ,  Y02P20/584

    摘要： The present invention discloses a process for preparing 4-aminodiphenylamine, which process uses nitrobenzene and aniline as raw materials, a complex base catalyst as condensation catalyst and a powdery composite catalyst as hydrogenation catalyst, and comprises five process stages: condensation; separation I; hydrogenation; separation II; and refining. The process can be continuously carried out. By selecting a complex base catalyst to catalyze the condensation reaction and separating it prior to the hydrogenation, the problem that the complex base catalysts thermally decompose in the hydrogenation reaction is avoided, the selectable range of hydrogenation catalysts is largely enlarged so that it is possible to select cheaper hydrogenation catalyst, and the selection of production process and equipment is easier and further industrialization is easier. The complex base catalysts used in the present invention are inexpensive and have higher catalytic activity. The process can be carried out at mild conditions and can adapt to broad range of water content, by-product is less and conversion and selectivity are higher. The operational strength is low, no corrosive liquid is produced, and environment pollution is reduced. The purity of 4-aminodiphenylamine prepared can exceed 99 wt.-%, and the yield in the industrial production process can be over 95%.

    摘要翻译： 本发明公开了一种制备4-氨基二苯胺的方法，该方法以硝基苯和苯胺为原料，复合碱催化剂作为缩合催化剂和粉末复合催化剂作为氢化催化剂，包括五个工艺步骤：冷凝; 分离I 氢化; 分离二 并精炼。 该过程可以连续进行。 通过选择复合碱催化剂催化缩合反应并在氢化之前将其分离，避免了复合碱催化剂在氢化反应中热分解的问题，氢化催化剂的可选择范围大大扩大， 选择更便宜的氢化催化剂，生产工艺和设备的选择更容易，工业化进一步发展。 本发明中使用的复合碱催化剂价格低廉，催化活性更高。 该方法可以在温和的条件下进行，可适应广泛的含水量，副产物少，转化率和选择性更高。 操作强度低，无腐蚀性液体，环境污染减少。 制备的4-氨基二苯胺的纯度可以超过99重量％，工业生产过程中的产率可以超过95％。

    Process for preparing 4-aminodiphenylamine
    3.
    发明授权
    Process for preparing 4-aminodiphenylamine 有权
    制备4-氨基二苯胺的方法

    公开(公告)号：US07235694B2

    公开(公告)日：2007-06-26

    申请号：US11477954

    申请日：2006-06-30

    申请人： Xiaogen Feng ,  Nongyue Wang ,  Xiaohui Mao ,  Ruibiao Yu ,  Qianwen Cheng

    发明人： Xiaogen Feng ,  Nongyue Wang ,  Xiaohui Mao ,  Ruibiao Yu ,  Qianwen Cheng

    IPC分类号： C07C209/00

    CPC分类号： C07C209/24 ,  B01D1/065 ,  C07C209/02 ,  C07C209/36 ,  C07C209/38 ,  C07C209/86 ,  Y02P20/584 ,  C07C211/56 ,  C07C211/54

    摘要： A process for preparing 4-aminodiphenylamine having the steps of reacting nitrobenzene and aniline in the presence of a complex base catalyst, hydrogenating the reaction mixture with hydrogen, a powdery composite catalyst, and a hydrogenation solvent; separating, recovering, and reusing the complex base catalyst and the powdery composite catalyst from the reaction mixture; separating, recovering, and reusing aniline, and optionally water, from the the reaction mixture; refining the reaction mixture to obtain 4-aminodiphenylamine. The complex base catalyst comprises tetraalkyl ammonium hydroxide, and tetraalkyl ammonium salt.

    摘要翻译： 一种制备4-氨基二苯胺的方法，其步骤是在复合碱催化剂存在下使硝基苯和苯胺反应，用氢氢化反应混合物，粉末复合催化剂和氢化溶剂; 从反应混合物中分离，回收和再利用复合碱催化剂和粉末复合催化剂; 从反应混合物中分离，回收和再利用苯胺和任选的水; 精制反应混合物得到4-氨基二苯胺。 复合碱催化剂包括四烷基氢氧化铵和四烷基铵盐。

    Process for preparing 4-aminodiphenylamine
    5.
    发明授权
    Process for preparing 4-aminodiphenylamine 有权
    制备4-氨基二苯胺的方法

    公开(公告)号：US07989662B2

    公开(公告)日：2011-08-02

    申请号：US12195371

    申请日：2008-08-20

    申请人： Xiaogen Feng ,  Nongyue Wang ,  Xiaohui Mao ,  Ruibiao Yu ,  Qianwen Cheng

    发明人： Xiaogen Feng ,  Nongyue Wang ,  Xiaohui Mao ,  Ruibiao Yu ,  Qianwen Cheng

    IPC分类号： C07C209/00

    CPC分类号： C07C209/24 ,  B01D1/065 ,  C07C209/02 ,  C07C209/36 ,  C07C209/38 ,  C07C209/86 ,  Y02P20/584 ,  C07C211/56 ,  C07C211/54

    摘要： A process for preparing 4-aminodiphenylamine having the steps of reacting nitrobenzene and aniline in the presence of a complex base catalyst, hydrogenating the reaction mixture with hydrogen, a powdery composite catalyst, and a hydrogenation solvent; separating, recovering, and reusing the complex base catalyst and the powdery composite catalyst from the reaction mixture; separating, recovering, and reusing aniline, and optionally water, from the reaction mixture; refining the reaction mixture to obtain 4-aminodiphenylamine. The complex base catalyst comprises tetraalkyl ammonium hydroxide, and tetraalkyl ammonium salt.

    摘要翻译： 一种制备4-氨基二苯胺的方法，其步骤是在复合碱催化剂存在下使硝基苯和苯胺反应，用氢氢化反应混合物，粉末复合催化剂和氢化溶剂; 从反应混合物中分离，回收和再利用复合碱催化剂和粉末复合催化剂; 从反应混合物中分离，回收和再使用苯胺和任选的水; 精制反应混合物得到4-氨基二苯胺。 复合碱催化剂包括四烷基氢氧化铵和四烷基铵盐。

    PROCESS FOR PREPARING 4-AMINODIPHENYLAMINE
    6.
    发明申请
    PROCESS FOR PREPARING 4-AMINODIPHENYLAMINE 有权
    制备4-氨基二苯胺的方法

    公开(公告)号：US20090048465A1

    公开(公告)日：2009-02-19

    申请号：US12195371

    申请日：2008-08-20

    申请人： Xiaogen Feng ,  Nongyue Wang ,  Xiaohui Mao ,  Ruibiao Yu ,  Qianwen Cheng

    发明人： Xiaogen Feng ,  Nongyue Wang ,  Xiaohui Mao ,  Ruibiao Yu ,  Qianwen Cheng

    IPC分类号： C07C209/00

    CPC分类号： C07C209/24 ,  B01D1/065 ,  C07C209/02 ,  C07C209/36 ,  C07C209/38 ,  C07C209/86 ,  Y02P20/584 ,  C07C211/56 ,  C07C211/54

    摘要： A process for preparing 4-aminodiphenylamine having the steps of reacting nitrobenzene and aniline in the presence of a complex base catalyst, hydrogenating the reaction mixture with hydrogen, a powdery composite catalyst, and a hydrogenation solvent; separating, recovering, and reusing the complex base catalyst and the powdery composite catalyst from the reaction mixture; separating, recovering, and reusing aniline, and optionally water, from the reaction mixture; refining the reaction mixture to obtain 4-aminodiphenylamine. The complex base catalyst comprises tetraalkyl ammonium hydroxide, and tetraalkyl ammonium salt.

    摘要翻译： 一种制备4-氨基二苯胺的方法，其步骤是在复合碱催化剂存在下使硝基苯和苯胺反应，用氢氢化反应混合物，粉末复合催化剂和氢化溶剂; 从反应混合物中分离，回收和再利用复合碱催化剂和粉末复合催化剂; 从反应混合物中分离，回收和再使用苯胺和任选的水; 精制反应混合物得到4-氨基二苯胺。 复合碱催化剂包括四烷基氢氧化铵和四烷基铵盐。

    Process for preparing 4-aminodiphenylamine
    8.
    发明授权
    Process for preparing 4-aminodiphenylamine 有权
    制备4-氨基二苯胺的方法

    公开(公告)号：US08686188B2

    公开(公告)日：2014-04-01

    申请号：US13104900

    申请日：2011-05-10

    申请人： Xiaogen Feng ,  Nongyue Wang ,  Xiaohui Mao ,  Ruibiao Yu ,  Qianwen Cheng ,  Renping Jiao

    发明人： Xiaogen Feng ,  Nongyue Wang ,  Xiaohui Mao ,  Ruibiao Yu ,  Qianwen Cheng ,  Renping Jiao

    IPC分类号： C07C209/00

    CPC分类号： C07C209/36 ,  C07C209/60 ,  C07C211/55

    摘要： A method for refining an organic composition containing 4-aminodiphenylamine, aniline, azobenzene, and phenazine, having the steps of feeding the organic composition to a first rectification column, producing a first effluent composition containing aniline, azobenzene, phenazine, and a small amount of 4-aminodiphenylamine at the top of the first rectification column and a second effluent composition containing crude 4-aminodiphenylamine at the bottom of the first rectification column, feeding the second effluent composition to a second rectification column, and producing a 4-aminodiphenylamine composition at the top of the second rectification column and a residual composition at the bottom of the second rectification column.

    摘要翻译： 一种精制含有4-氨基二苯胺，苯胺，偶氮苯和吩嗪的有机组合物的方法，具有将有机组合物进料到第一精馏塔中的步骤，制备含有苯胺，偶氮苯，吩嗪和少量 第一精馏塔顶部的4-氨基二苯胺和在第一精馏塔底部含有粗4-氨基二苯胺的第二流出物组合物，将第二流出物组合物进料到第二精馏塔，并在第二精馏塔中产生4-氨基二苯胺组合物 第二精馏塔的顶部和第二精馏塔底部的残留组成。

    Process for preparing 4-aminodiphenylamine
    10.
    发明授权
    Process for preparing 4-aminodiphenylamine 有权
    制备4-氨基二苯胺的方法

    公开(公告)号：US07176333B2

    公开(公告)日：2007-02-13

    申请号：US10882677

    申请日：2004-07-02

    申请人： Nongyue Wang ,  Ruibiao Yu ,  Xiaohui Mao ,  Xiaogen Feng ,  Qianwen Cheng

    发明人： Nongyue Wang ,  Ruibiao Yu ,  Xiaohui Mao ,  Xiaogen Feng ,  Qianwen Cheng

    IPC分类号： C07C209/60

    CPC分类号： C07C211/55 ,  C07C209/36 ,  C07C209/60 ,  Y02P20/584

    摘要： The present invention discloses a process for preparing 4-aminodiphenylamine, which process uses nitrobenzene and aniline as raw materials, a complex base catalyst as condensation catalyst and a powdery composite catalyst as hydrogenation catalyst, and comprises five process stages: condensation; separation I; hydrogenation; separation II; and refining. The process can be continuously carried out. By selecting a complex base catalyst to catalyze the condensation reaction and separating it prior to the hydrogenation, the problem that the complex base catalysts thermally decompose in the hydrogenation reaction is avoided, the selectable range of hydrogenation catalysts is largely enlarged so that it is possible to select cheaper hydrogenation catalyst, and the selection of production process and equipment is easier and further industrialization is easier. The complex base catalysts used in the present invention are inexpensive and have higher catalytic activity. The process can be carried out at mild conditions and can adapt to broad range of water content, by-product is less and conversion and selectivity are higher. The operational strength is low, no corrosive liquid is produced, and environment pollution is reduced. The purity of 4-aminodiphenylamine prepared can exceed 99 wt.-%, and the yield in the industrial production process can be over 95%.

    摘要翻译： 本发明公开了一种制备4-氨基二苯胺的方法，该方法以硝基苯和苯胺为原料，复合碱催化剂作为缩合催化剂和粉末复合催化剂作为氢化催化剂，包括五个工艺步骤：冷凝; 分离I 氢化; 分离二 并精炼。 该过程可以连续进行。 通过选择复合碱催化剂催化缩合反应并在氢化之前将其分离，避免了复合碱催化剂在氢化反应中热分解的问题，氢化催化剂的可选择范围大大扩大， 选择更便宜的氢化催化剂，生产工艺和设备的选择更容易，工业化进一步发展。 本发明中使用的复合基础催化剂价廉，具有较高的催化活性。 该方法可以在温和的条件下进行，可适应广泛的含水量，副产物少，转化率和选择性更高。 操作强度低，无腐蚀性液体，环境污染减少。 制备的4-氨基二苯胺的纯度可以超过99重量％，工业生产过程中的产率可以超过95％。