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    • 2. 发明授权
    • Method for ethylene polymerization in a tubular reactor with reduced output
    • 在具有降低的产量的管式反应器中进行乙烯聚合的方法
    • US08273835B2
    • 2012-09-25
    • US13144355
    • 2010-01-14
    • Dieter LittmannAndre-Armand FinetteHans Joachim Meinke
    • Dieter LittmannAndre-Armand FinetteHans Joachim Meinke
    • C08F2/00C08F10/02B01J19/24
    • B01J19/2415B01J4/008C08F10/02C08F2/38C08F4/38C08F2/00
    • Process for the preparation of ethylene homopolymers or copolymers in the presence of free-radical polymerization initiators at from 100° C. to 350° C. and pressures in the range of from 160 MPa to 350 MPa in a tubular reactor with at least two spatially separated initiator injection points, wherein injecting initiator rises the temperature of the reaction mixture in the reaction zone following the injection point, and the first initiator injection point of the tubular reactor is not provided with initiator or is provided with so little initiator that the temperature of the reaction mixture does not rise more than 20° C. in the first reaction zone and method for reducing the output of a high pressure tubular reactor for the homo- or copolymerization of ethylene in the presence of free-radical polymerization initiators with at least two initiator injection points, wherein feeding of free-radical polymerization initiator to the first initiator injection point is discontinued or reduced to a level that the temperature of the reaction mixture in the first reaction zone does not rise more than 20° C.
    • 在自由基聚合引发剂存在下,在100℃至350℃下制备乙烯均聚物或共聚物的方法,并且在具有至少两个空间位置的管式反应器中在160MPa至350MPa范围内的压力 分离的引发剂注入点,其中注射引发剂在注射点之后升高反应区域中的反应混合物的温度,并且管式反应器的第一引发剂注入点不具有引发剂,或者设置有少量引发剂, 反应混合物在第一反应区域中不会升高超过20℃,并且在自由基聚合引发剂存在下,降低高压管式反应器用于乙烯均聚或共聚的产物的方法与至少两种 引发剂注入点,其中自由基聚合引发剂向第一引发剂注入点的进料停止或减少 d达到第一反应区中的反应混合物的温度不升高超过20℃的水平。