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    Process for producing aromatic amines
    1.
    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 continuous preparation of dialkyl carbonates
    2.
    发明授权
    Process for the continuous preparation of dialkyl carbonates 失效
    连续制备碳酸二烷基酯的方法

    公开(公告)号：US5359118A

    公开(公告)日：1994-10-25

    申请号：US059489

    申请日：1993-05-10

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

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

    IPC分类号： B01J23/08 ,  C07C68/06 ,  C07C69/96

    CPC分类号： C07C68/065 ,  Y10S203/06

    摘要： Di-(C.sub.1 -C.sub.4 -alkyl) carbonates can be prepared by catalysed counter-current reesterification of ethylene glycol carbonate or propylene glycol carbonate with a C.sub.1 -C.sub.4 -alcohol in a column, ethylene glycol carbonate or propylene glycol carbonate being introduced into the upper part of the column and a dialkyl carbonate-containing C.sub.1 -C.sub.4 -alcohol being introduced into the central or lower part of the column and pure alcohol being additionally introduced below the introduction of the dialkyl carbonate-containing alcohol.

    摘要翻译： 二 - （C 1 -C 4 - 烷基）碳酸酯可以通过催化的乙二醇碳酸酯或丙二醇碳酸酯与柱中的C 1 -C 4醇的逆流再酯交换，乙二醇碳酸酯或丙二醇碳酸酯引入上层 将柱的一部分和含有二烷基碳酸酯的C 1 -C 4醇引入塔的中部或下部，并且在引入含二烷基碳酸酯的醇之外另外引入纯醇。

    Process for the preparation of diaryl carbonates
    3.
    发明授权
    Process for the preparation of diaryl carbonates 失效
    制备碳酸二芳基酯的方法

    公开(公告)号：US5344954A

    公开(公告)日：1994-09-06

    申请号：US103936

    申请日：1993-08-06

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

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

    IPC分类号： C07B61/00 ,  C07C68/06 ,  C07C69/96

    CPC分类号： C07C68/06

    摘要： Diaryl carbonates are prepared from dialkyl carbonates and phenolic compounds by transesterification in the presence of a transesterification catalyst at 60.degree.-320.degree. C. in an apparatus composed of two columns in a continuous procedure. In the first column, the starting materials form essentially the associated alkyl aryl carbonate, from which, in the second column, the diaryl carbonate is produced by further transesterification and disproportionation.

    摘要翻译： 碳酸二芳基酯由碳酸二烷基酯和酚类化合物通过在酯交换催化剂存在下，在60-320℃下在连续方法中由两列组成的装置中制备。 在第一列中，起始材料基本上形成缔合的碳酸烷基芳基酯，在第二列中，通过进一步的酯交换和歧化产生碳酸二芳基酯。

    Method for the preparation of azomethines
    4.
    发明授权
    Method for the preparation of azomethines 失效
    制备偶氮甲碱的方法

    公开(公告)号：US5298659A

    公开(公告)日：1994-03-29

    申请号：US4349

    申请日：1993-01-14

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

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

    IPC分类号： C07B61/00 ,  C07C249/02 ,  C07C251/20

    CPC分类号： C07C249/02

    摘要： Azomethines can be prepared by the condensation of cycloalkanones and anilines in the presence of acid homogeneous catalysts while the water of reaction is removed azeotropically, the condensation being carried out in a continuous reaction in a column-like reactor to which a temperature profile is applied, the starting materials being fed in in the low-temperature region, and, of the reaction products, the water of reaction to be removed azeotropically being discharged also in the low-temperature region and the azomethine produced being discharged in the high-temperature region.

    摘要翻译： 偶氮甲碱可以通过在酸均相催化剂存在下环烷酮和苯胺的缩合制备，同时反应水共沸除去，缩合是在连续反应中进行的，其中应用了温度分布的柱状反应器， 原料在低温区域进料，反应产物中的共沸脱除反应的水也在低温区域中排出，产生的偶氮甲碱在高温区域排出。

    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。