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43 条记录 (耗时 0.031 秒)

    Process for the isolation of partially crystalline polycarbonate powder
    4.
    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 producing thermoplastic granulated polymer material from polymer solutions
    5.
    发明授权
    Process for producing thermoplastic granulated polymer material from polymer solutions 失效
    从聚合物溶液制备热塑性粒状聚合物材料的方法

    公开(公告)号：US5684087A

    公开(公告)日：1997-11-04

    申请号：US719775

    申请日：1996-09-25

    申请人： Claus Wulff ,  Gottfried Zaby ,  Clemens Casper ,  Klemens Kohlgruber ,  Thomas Bamberger ,  Hugo Obermann

    发明人： Claus Wulff ,  Gottfried Zaby ,  Clemens Casper ,  Klemens Kohlgruber ,  Thomas Bamberger ,  Hugo Obermann

    IPC分类号： C08J3/12 ,  B29B9/00 ,  B29B9/06 ,  B29K69/00 ,  C08G63/89 ,  C08G64/40 ,  C08J3/14 ,  C08G63/48

    CPC分类号： C08J3/14 ,  B29B7/7485 ,  B29B9/06 ,  C08G63/89 ,  C08G64/403

    摘要： This invention relates to a process for producing granulated polymer materials from polymer solutions, in which organic solvent of the polymer solution is evaporated in a heat exchanger, optionally with the admixture of steam, or in a holding tube with the admixture of steam, and the paste-like mixture of concentrated solution, solvent vapour and optionally of condensed steam is separated in a separator provided with rotating built-in components for cleaning off the walls. The pre-concentrated polymer solution is further concentrated in the separator by supplying heat by way of heating the separator walls or the rotating built-in components and by the shearing energy of the rotating built-in components.Residual degassing of the solvent is effected before granulation, e.g. in the discharge extruder of the separator which is provided with rotating built-in components, through one or more degassing zones, optionally by the additional admixture of entraining media, such as inert gas or steam, for example.

    摘要翻译： 本发明涉及一种由聚合物溶液制备粒状聚合物材料的方法，其中聚合物溶液的有机溶剂在热交换器中蒸发，任选地与蒸汽混合，或在具有蒸汽混合物的保持管中蒸发， 浓缩溶液，溶剂蒸气和任选的冷凝蒸汽的糊状混合物在具有旋转的内置部件的隔板中分离，用​​于清洁壁。 通过加热隔离壁或旋转的内置部件以及旋转的内置部件的剪切能量，将预浓缩的聚合物溶液进一步浓缩在隔板中。 在造粒前进行溶剂的残留脱气，例如 在具有旋转内置部件的分离器的排出挤出机中，通过一个或多个脱气区，任选地通过例如惰性气体或蒸汽的夹带介质的附加混合物。

    Process for the production of polycarbonate of constant viscosity
    7.
    发明授权
    Process for the production of polycarbonate of constant viscosity 失效
    用于生产恒定粘度的聚碳酸酯的方法

    公开(公告)号：US5412060A

    公开(公告)日：1995-05-02

    申请号：US189382

    申请日：1994-01-31

    申请人： Claus Wulff ,  Uwe Hucks ,  Rolf Bachmann ,  Gunther Weymans ,  Jurgen Kadelka ,  Wolfgang Herrig

    发明人： Claus Wulff ,  Uwe Hucks ,  Rolf Bachmann ,  Gunther Weymans ,  Jurgen Kadelka ,  Wolfgang Herrig

    IPC分类号： C08G64/24 ,  C08G64/00

    CPC分类号： C08G64/24

    摘要： The invention relates to a process for the production of polycarbonates by the two-phase interfacial method in which deviations between measured and estimated variables are continuously minimized by means of a suitably selected observer or filter system on the basis of a process model with an empirical Mark-Houwink relation adapted to the process. The variables estimated by the observer/filter are converted into control variables which are used to set input streams of the production process. Product quality is kept constant, changes in load or set values are quickly intercepted and even disturbances not readily accessible to measurement are taken into account by the process control.

    摘要翻译： 本发明涉及通过两相界面方法生产聚碳酸酯的方法，其中通过适当选择的观察者或过滤系统，在经验标记的过程模型的基础上，将测量值和估计变量之间的偏差连续最小化 -Houwink关系适应过程。 由观察者/过滤器估计的变量被转换为用于设置生产过程的输入流的控制变量。 产品质量保持不变，负载或设定值的变化被快速截断，并且通过过程控制考虑到测量中不容易获得的均匀干扰。