利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

19 条记录 (耗时 0.02 秒)

    Process for the isolation of partially crystalline polycarbonate powder
    8.
    发明授权
    Process for the isolation of partially crystalline polycarbonate powder 失效
    用于分离部分结晶的聚碳酸酯粉末的方法

    公开(公告)号：US5830977A

    公开(公告)日：1998-11-03

    申请号：US778654

    申请日：1997-01-03

    申请人： Claus Wulff ,  Gottfried Zaby ,  Clemens Casper ,  Klemens Kohlgruber ,  Hugo Obermann ,  Steffen Kuhling

    发明人： Claus Wulff ,  Gottfried Zaby ,  Clemens Casper ,  Klemens Kohlgruber ,  Hugo Obermann ,  Steffen Kuhling

    IPC分类号： C08G64/40 ,  C08J3/14 ,  C08G64/00

    CPC分类号： C08J3/14 ,  C08G64/403 ,  C08J2369/00

    摘要： The present invention provides a process for the isolation of partially crystalline polycarbonate powder or oligocarbonate powder from solutions thereof, in which process the organic solvent of a polycarbonate solution is vaporized in a heat exchanger, optionally with incorporation of steam, or in a holding tube with incorporation of steam and the pasty mixture of concentrated solution, solvent vapor and optionally water is separated in a separator. In this process, the solvent vapor is condensed in a heat exchanger downstream from the separator. The solvent is vaporized in the heat exchanger by indirect input of heat through the heat exchanger walls and vaporization may be promoted by preheating the polycarbonate or oligocarbonate solution in an upstream heat exchanger or by introducing steam or both.

    摘要翻译： 本发明提供从其溶液中分离部分结晶的聚碳酸酯粉末或低聚碳酸酯粉末的方法，其中聚碳酸酯溶液的有机溶剂在热交换器中蒸发，任选地加入蒸汽，或在具有 在分离器中分离蒸汽和浓缩溶液，溶剂蒸气和任选的水的糊状混合物。 在该方法中，溶剂蒸汽在分离器下游的热交换器中冷凝。 溶剂在热交换器中通过热交换器壁的间接输入而蒸发，并且通过在上游热交换器中预热聚碳酸酯或低聚碳酸溶液或通过引入蒸汽或两者来促进蒸发。

    Process for preparing diaryl carbonates and the polycarbonates obtainable therefrom
    9.
    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。

    Process for the production of polycarbonate agglomerate
    10.
    发明授权
    Process for the production of polycarbonate agglomerate 失效
    生产聚碳酸酯聚集体的方法

    公开(公告)号：US5852157A

    公开(公告)日：1998-12-22

    申请号：US810263

    申请日：1997-03-03

    申请人： Gottfried Zaby ,  Clemens Casper ,  Klemens Kohlgruber ,  Hugo Obermann

    发明人： Gottfried Zaby ,  Clemens Casper ,  Klemens Kohlgruber ,  Hugo Obermann

    IPC分类号： C08J3/14 ,  B01J2/02 ,  C08G64/40 ,  C08G64/00

    CPC分类号： B01J2/02

    摘要： This invention relates to a process for the production of polycarbonate agglomerate of high bulk density from polycarbonate solutions, in which the organic solvent is stripped from a solution of polycarbonate by means of steam, and which is characterised in that the resulting suspension of polycarbonate particles, condensed water and water- and solvent vapor is fed in a tube or tubular heat exchanger to a separator which is partially filled with water and which is under elevated pressure. The polycarbonate agglomerates are discharged, together with part of the water, via a pressure lock at the bottom of the separator.

    摘要翻译： 本发明涉及由聚碳酸酯溶液制备高堆积密度的聚碳酸酯聚集体的方法，其中有机溶剂通过蒸汽从聚碳酸酯溶液中剥离，其特征在于所得的聚碳酸酯颗粒悬浮液， 冷凝水和水和溶剂蒸汽在管或管式热交换器中进料到部分被水填充并且处于升高压力下的分离器中。 聚碳酸酯附聚物与部分水一起通过分离器底部的压力锁定排出。