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    • 96. 发明授权
    • Process for preparing a poly-1-olefin in the presence of a Ziegler catalyst
    • 在齐格勒催化剂存在下制备聚-1-烯烃的方法
    • US07649061B2
    • 2010-01-19
    • US11658808
    • 2005-07-27
    • Friedhelm Gundert
    • Friedhelm Gundert
    • C08F4/42
    • C08F10/00C08F110/02C08F4/6548C08F4/6555C08F2500/12C08F2500/17C08F2500/18C08F2500/24
    • The invention relates to a process for preparing a poly-1-olefin by polymerization of a 1-olefin of the formula R4CH═CH2, where R4 is hydrogen or an alkyl radical having from 1 to 10 carbon atoms, in suspension, in solution or in the gas phase, at a temperature of from 20 to 200° C. and a pressure of from 0.5 to 50 bar, in the presence of a catalyst which comprises the reaction product of a magnesium alkoxide with a transition metal compound (=component a) and an organometallic compound (=component b) and whose component a has been prepared in a manner having the feature that a magnesium alkoxide powder having a mean particle size, expressed as the d50, in the range from 100 to 1000 μm is firstly processed by dry milling in a mill under inert conditions to produce magnesium alkoxide powder having a mean particle size, expressed as the d50, of less than 15 μm, then suspended in an inert hydrocarbon in which the magnesium alkoxide is insoluble, and is reacted immediately without further pretreatment with a transition metal compound of titanium, zirconium, vanadium or chromium.
    • 本发明涉及通过聚合式R 4 CH-CH 2的1-烯烃(其中R 4是氢或具有1至10个碳原子的烷基,在悬浮液中,在溶液中或溶液中)聚合制备聚-1-烯烃的方法, 在气相中,在20〜200℃的温度和0.5〜50巴的压力下,在含有烷氧基镁与过渡金属化合物的反应产物(=组分a )和有机金属化合物(=成分b),其成分a以具有以d50表示的平均粒径的烷氧基镁粉末在100〜1000μm的范围内的方式制备,首先被处理 通过在惰性条件下在研磨机中干研磨以产生平均粒度(d50表示)小于15μm的烷氧基镁粉末,然后悬浮在惰性烃中,其中烷氧化镁不溶,并且立即反应而没有 愤怒 用钛,锆,钒或铬的过渡金属化合物预处理。
    • 97. 发明授权
    • Method of controlling olefin polymerization
    • 控制烯烃聚合的方法
    • US07601783B2
    • 2009-10-13
    • US11099328
    • 2005-04-05
    • Mark B. DavisJames Daniel Madden
    • Mark B. DavisJames Daniel Madden
    • C08L23/00C08L23/04
    • C08F10/00C08F10/02C08F110/02C08F210/16C08F4/6555C08F2/38C08F2500/01C08F2500/02C08F2500/05C08F2500/12C08F210/14
    • A method of making polyolefin with a target melt flow index and melt flow rate is disclosed. The method polymerizes one or more olefinic monomers in a single reactor containing a bicomponent catalyst system. The catalyst system includes a first catalyst component and a second catalyst component each characterized by a catalyst productivity and a chain-transfer-agent response. The single reactor has a chain-transfer-agent concentration and a temperature. The productivity of the second catalyst component is substantially different temperature dependent than that of the first catalyst component. The chain-transfer-agent response of the second catalyst component is substantially different sensitive than that of the first catalyst component. The temperature of the reactor is adjusted so that the melt flow ratio approaches the target value. The chain transfer agent concentration in the reactor is adjusted so that the melt index approaches the target value.
    • 公开了制备具有目标熔体流动指数和熔体流动速率的聚烯烃的方法。 该方法在含有双组分催化剂体系的单个反应器中聚合一种或多种烯属单体。 催化剂体系包括第一催化剂组分和第二催化剂组分,每个催化剂组分的特征在于催化剂生产率和链转移剂反应。 单个反应器具有链转移剂浓度和温度。 第二催化剂组分的生产率与第一催化剂组分的生产率基本上不同。 第二催化剂组分的链转移剂反应与第一催化剂组分的反应基本不同。 调整反应器的温度使得熔体流动比接近目标值。 调节反应器中的链转移剂浓度,使得熔体指数接近目标值。