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    Preparation of linear high molecular weight saturated polyesters
    3.
    发明授权
    Preparation of linear high molecular weight saturated polyesters 失效
    线性高分子量饱和聚酯的制备

    公开(公告)号：US4248996A

    公开(公告)日：1981-02-03

    申请号：US15785

    申请日：1979-02-28

    申请人： Hans-Josef Sterzel ,  Franz Schmidt ,  Hans Pirzer

    发明人： Hans-Josef Sterzel ,  Franz Schmidt ,  Hans Pirzer

    IPC分类号： C08G63/00 ,  C08G63/78 ,  C08G63/22

    CPC分类号： C08G63/78

    摘要： A process for the preparation of high molecular weight linear saturated polyesters derived from dicarboxylic acids or their ester-forming derivatives and aliphatic and/or cycloaliphatic diols, comprising the condensation of polyester precondensates having a relative viscosity of from 1.05 to 1.15 at from 220.degree. to 280.degree. C. under reduced pressure, wherein(a) the condensation is first started with from 70 to 95 percent by weight of the polyester precondensate and(b) after from 10 to 50% of the total condensation time the remaining 5 to 30 percent by weight of the polyester precondensate are added to the polyester melt undergoing condensation in accordance with (a), and the condensation is taken to completion.

    摘要翻译： 一种制备衍生自二羧酸或其酯形成衍生物和脂族和/或脂环族二醇的高分子量线性饱和聚酯的方法，其包括在220℃下相对粘度为1.05至1.15的聚酯预缩合物的缩合， 280℃，其中（a）首先以70至95重量％的聚酯预缩合物开始缩合，和（b）在总冷凝时间的10至50％之后，剩余的5至30重量％ 加入到根据（a）进行缩合的聚酯熔融物中，并进行冷凝。

    Process and apparatus for achieving a uniform flow profile
    4.
    发明授权
    Process and apparatus for achieving a uniform flow profile 失效
    用于实现均匀流动分布的方法和装置

    公开(公告)号：US4202375A

    公开(公告)日：1980-05-13

    申请号：US859459

    申请日：1977-12-12

    申请人： Werner Hoerauf ,  Hans Pirzer ,  Ernst Guenther ,  Eckart Neumann ,  Ernst Dietrich

    发明人： Werner Hoerauf ,  Hans Pirzer ,  Ernst Guenther ,  Eckart Neumann ,  Ernst Dietrich

    IPC分类号： F15D1/02

    CPC分类号： F15D1/02

    摘要： A process for achieving a uniform flow profile of very viscous liquids when flowing through tubes or reaction chambers, wherein the very viscous liquid is passed through annular spaces extending concentrically with increasing diameter over the entire cross-section of the tubes or reaction chambers and having the same depth in the direction of flow, and this procedure is repeated once or several times, the annular spaces being staggered with respect to each other as viewed in the direction of flow, and an apparatus consisting of a combination of two or more discs arranged at axial intervals within a tube transversely to the direction of flow, each disc consisting of a plurality of ring-shaped bands of increasing diameter, the bands being arranged freely of one another and concentrically at intervals on a grid supporting means to provide correspondingly concentric open spaces between the bands over the entire cross-section of the tube, with the walls of the bands running parallel to the direction of flow, and the bands of the separate discs being staggered with respect to each other as viewed in the direction of flow.

    摘要翻译： 一种在流过管或反应室时实现非常粘稠的液体的均匀流动分布的方法，其中非常粘稠的液体通过在管或反应室的整个横截面上以增加的直径同心延伸的环形空间，并且具有 在流动方向上具有相同的深度，并且该过程重复一次或几次，环形空间在流动方向上相对于彼此交错，并且由两个或更多个盘的组合组成的装置 横向于流动方向的管内的轴向间隔，每个盘由多个增加直径的环形带组成，带彼此自由地布置并且间隔地均匀地布置在格栅支撑装置上，以提供相应的同心开放空间 在管的整个横截面之间的带之间，带的壁平行于该带 流动方向，并且当从流动方向观察时，分离盘的带彼此相对错开。