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2. 发明授权

US4330645A Preparation of propylene homopolymers or copolymers 失效
标题翻译：制备丙烯均聚物或共聚物
公开(公告)号：US4330645A
公开(公告)日：1982-05-18
申请号：US249691
申请日：1981-03-31
申请人： Dirk Juza , Dieter Stein
发明人： Dirk Juza , Dieter Stein
IPC分类号： B01J8/08 , C08F2/34 , C08F10/06
CPC分类号： C08F10/06 , B01J8/087 , B01J2208/00061 , Y10S526/901
摘要： A process for the preparation of propylene homopolymers or copolymers by polymerizing the monomer or monomers in the gas phase in a centric stirred bed of finely divided polymer, with removal of the heat of polymerization by evaporative cooling, the temperature in the polymerization zone being regulated by measuring the temperature continuously and causing any change therein to trigger a change in the amount of liquid monomer, evaporating in the reaction zone, which is introduced per unit time, in which process(1) the radius and height of the centric stirred bed are in a particular ratio to one another, (2) the finely divided polymer in the centric stirred bed is caused to move upward in the peripheral zone of the bed and downward in the central zone of the bed, (3) the temperature in the polymerization zone is regulated by simultaneously measuring it at (3.1) one or more points of the inner part of the stirred bed and (3.2) one or more points of the outer part of the stirred bed and (4) the actual temperatures T determined simultaneously at the individual points of measurement are combined to give a temperature parameter T.sub.M and the difference of this parameter from the intended value triggers the regulating sequence, or the temperature differences .DELTA.T between the actual and intended temperatures, measured simultaneously at the individual points of measurement, are combined to give a difference parameter .DELTA.T.sub.M and this parameter triggers the regulating operation.
摘要翻译：一种通过在气相中在单分散的聚合物的中心搅拌床中聚合单体或单体，通过蒸发冷却除去聚合热的方式制备丙烯均聚物或共聚物的方法，聚合区域中的温度由连续测量温度并引起其中的任何变化，引发液体单体的量的变化，在每单位时间引入的反应区中蒸发，其中过程（1）中心搅拌床的半径和高度处于（2）将中心搅拌床中的细碎聚合物在床的周边区域向上移动，并在床的中心区域向下移动，（3）聚合区域中的温度通过在（3.1）搅拌床内部的一个或多个点处同时测量（3.2）搅拌床外部的一个或多个点，并且（4）将各个测量点同时测定的实际温度T相结合，得到温度参数TM，该参数与预期值的差值触发调节顺序，或实际温度和预期温度之间的温差DELTA T ，在各个测量点同时测量，结合给出差分参数DELTA TM，该参数触发调节操作。

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