利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

196 条记录 (耗时 0.018 秒)

    Process for producing aromatic amines
    7.
    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 preparing diaryl carbonates and the polycarbonates obtainable therefrom
    8.
    发明授权
    Process for preparing diaryl carbonates and the polycarbonates obtainable therefrom 失效
    制备碳酸二芳酯和由其获得的聚碳酸酯的方法

    公开(公告)号：US5739258A

    公开(公告)日：1998-04-14

    申请号：US804287

    申请日：1997-03-03

    申请人： Gottfried Zaby ,  Hans-Josef Buysch ,  Steffen Kuhling ,  Carsten Hesse ,  Johann Rechner

    发明人： Gottfried Zaby ,  Hans-Josef Buysch ,  Steffen Kuhling ,  Carsten Hesse ,  Johann Rechner

    IPC分类号： B01J23/40 ,  C07B61/00 ,  C07C68/00 ,  C07C68/08 ,  C07C69/96 ,  C08G64/20 ,  C08G64/30 ,  C08G64/36 ,  C08G64/00

    CPC分类号： C08G64/307 ,  C07C68/005

    摘要： The invention relates to a process for preparing a diaryl carbonate by oxidative carbonylation of the basic aromatic hydroxy compound, in which the aromatic hydroxy compound is the one which is eliminated during melt polycondensation of this diaryl carbonate with a bisphenol. Accordingly the invention also relates to the preparation of polycarbonates by melt polycondensation of diaryl carbonates with bisphenols in which the aromatic hydroxy compounds which is eliminated is used again to prepare the diaryl carbonate. In the event that the aromatic hydroxy compound eliminated is also the basic unit in the bisphenol used, proportions of it may be used to prepare both the diaryl carbonate and the bisphenol.

    摘要翻译： 本发明涉及通过碱性芳族羟基化合物的氧化羰基化制备碳酸二芳基酯的方法，其中芳族羟基化合物是在该碳酸二芳基酯与双酚的熔融缩聚期间被消除的。 因此，本发明还涉及通过碳酸二芳基酯与双酚的熔融缩聚制备聚碳酸酯，其中除去的芳族羟基化合物再次用于制备碳酸二芳基酯。 在除去芳族羟基化合物也是所用双酚中的基本单元的情况下，其比例可用于制备碳酸二芳基酯和双酚。