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    Process for producing aromatic amines
    3.
    发明授权
    Process for producing aromatic amines 失效
    生产芳香胺的方法

    公开(公告)号：US5808157A

    公开(公告)日：1998-09-15

    申请号：US511165

    申请日：1995-08-04

    申请人： Reinhard Langer ,  Hans-Josef Buysch ,  Paul Wagner ,  Ursula Pentling

    发明人： Reinhard Langer ,  Hans-Josef Buysch ,  Paul Wagner ,  Ursula Pentling

    IPC分类号： B01J23/648 ,  B01J23/44 ,  B01J23/64 ,  C07B61/00 ,  C07C209/36 ,  C07C211/44 ,  C07C211/45 ,  C07C211/46 ,  C07C211/47 ,  C07C211/49 ,  C07C209/04

    CPC分类号： C07C209/36

    摘要： Aromatic amines are produced by hydrogenation of the associated aromatic nitro compounds in the gas phase over fixed catalysts. The catalysts contain active hydrogenation metals on supports. The reaction is conducted at a pressure of 2-50 bar and at a temperature in the range 250.degree.-500.degree. C. under adiabatic conditions. A circulating gas is passed over the catalyst, which circulating gas contains 3-150 moles of hydrogen, 2-100 moles of the amino groups to be formed per mole of nitro groups, and 2 to 6 moles of water per amino group equivalent. The amine and water formed, as well as a purification stream, are separated from the circulating gas. Thereafter the circulating gas is enriched with volatilised aromatic nitro compound and fresh hydrogen and recycled.

    摘要翻译： 通过在气相中通过固定催化剂氢化相关联的芳族硝基化合物来生产芳族胺。 催化剂在载体上含有活性氢化金属。 反应在绝热条件下，在2-50巴的压力和250-500℃的温度下进行。 循环气体通过催化剂，循环气体含有3-150摩尔氢，每摩尔硝基形成2-100摩尔氨基和每个氨基当量2-6摩尔水。 所形成的胺和水以及净化物流与循环气体分离。 此后，循环气体富含挥发的芳​​香硝基化合物和新鲜氢气并再循环。

    Process for the preparation of azomethines
    5.
    发明授权
    Process for the preparation of azomethines 失效
    制备偶氮甲碱的方法

    公开(公告)号：US5292953A

    公开(公告)日：1994-03-08

    申请号：US57199

    申请日：1993-05-03

    申请人： Reinhard Langer ,  Hans-Josef Buysch ,  Paul Wagner

    发明人： Reinhard Langer ,  Hans-Josef Buysch ,  Paul Wagner

    IPC分类号： C07C249/02 ,  C07C251/20

    CPC分类号： C07C249/02 ,  C07C251/20

    摘要： Azomethines can be prepared by the condensation of cycloalkanones and anilines in the presence of acid heterogeneous catalysts, with azeotropic removal of the water of reaction, the condensation being carried out in a continuous reaction in a column-like reactor having an applied temperature profile, and the starting materials being fed in the low-temperature zone and, of the reaction products, the water of reaction to be removed as an azeotrope also being removed in the low-temperature zone and the azomethine formed being removed in the high-temperature zone.

    摘要翻译： 偶氮甲碱可以通过在酸性多相催化剂存在下环烷酮和苯胺的缩合制备，共沸除去反应水，在具有施加温度分布的柱状反应器中连续反应进行缩合，以及 在低温区中进料的起始原料和在低温区中除去的作为共沸物的待除去的反应产物的水，反应产物中形成的偶氮甲碱在高温区被除去。

    Process for the continuous preparation of dialkyl carbonates
    6.
    发明授权
    Process for the continuous preparation of dialkyl carbonates 失效
    连续制备碳酸亚铁的方法

    公开(公告)号：US5231212A

    公开(公告)日：1993-07-27

    申请号：US936182

    申请日：1992-08-26

    申请人： Hans-Josef Buysch ,  Alexander Klausener ,  Reinhard Langer ,  Franz-Josef Mais

    发明人： Hans-Josef Buysch ,  Alexander Klausener ,  Reinhard Langer ,  Franz-Josef Mais

    IPC分类号： C07C68/06 ,  C07C69/96

    CPC分类号： C07C68/065

    摘要： Dialkyl carbonates can be prepared in a continuous manner by transesterification of ethylene carbonate or propylene carbonate with alcohols in the presence of a catalyst in a column equipped with packing or baffles, by passing the reactants in countercurrent such that the ethylene carbonate or propylene carbonate are metered into the upper part of the column and the alcohol is metered into the lower part of the column and the catalyst is arranged as a fixed bed in the column or is also metered into the upper part of the column in solution or suspension, the dialkyl carbonate formed, if appropriate as a mixture with alcohol, being removed at the top of the column and the ethylene glycol or propylene glycol formed from the ethylene carbonate or propylene carbonate being removed at the foot of the column, if appropriate together with the catalyst.

    摘要翻译： 碳酸二烷基酯可以通过使碳酸亚乙酯或碳酸亚丙酯与醇在催化剂存在下在装备有填料或挡板的塔中进行酯交换，通过使反应物逆流使得将碳酸亚乙酯或碳酸亚丙酯计量 进入塔的上部，并将醇计量到塔的下部，并将催化剂作为固定床排列在塔中，或者也以溶液或悬浮液计量加入塔的上部，碳酸二烷基酯 如果合适地与醇的混合物形成，则在塔的顶部除去乙烯或碳酸亚丙酯形成的乙二醇或丙二醇，如果与催化剂一起适当，则将其从塔底除去。