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    • 117. 发明申请
    • POLYMERIZATION CATALYST USED FOR PRODUCING POLYOLEFINS THAT HAVE EXCELLENT COMBINED PROPERTIES
    • 用于制造具有突出的特征组合的聚烯烃聚合催化剂
    • WO01090204A1
    • 2001-11-29
    • PCT/EP2001/005452
    • 2001-05-14
    • C08F4/02C08F4/24C08F10/00C08F10/02
    • C08F10/02C08F4/24
    • The invention relates to a method for producing a catalyst used for polymerizing olefins. The inventive method comprises the following steps: a) producing a finely divided silica xerogel, b) loading said xerogel, starting from a solution of chromium trioxide or a chromium compound that is converted to chromium trioxide under the conditions of step c), with chromium, and c) activating the resulting product in a water-free gas flow that contains oxygen in a concentration of more than 10 % by volume at a temperature of from 400 to 1100 DEG C, and doping the product in step b) or in step c) with a fluorinating agent. The invention further relates to a catalyst used for polymerizing olefins that is obtained according to the inventive method and to a method for polymerizing olefins according to which an olefin or an olefinic mixture is polymerized in the presence of a catalyst, using an inventive catalyst.
    • 本发明涉及一种用于制备催化剂用于烯烃包括聚合:A)制备细分散的二氧化硅干凝胶; b)由三氧化铬或步骤c的合并与铬三氧化铬的铬化合物出来的条件)下的溶液的干凝胶的加载,以及c)在无水氧所得到的产物的激活在含有约10体积的浓度.-% 在温度的气流400到1100℃,其中,在阶段a氟化物掺杂与氟化剂b进行)或在步骤c)。 本发明还涉及一种用于烯烃聚合的,通过本发明的方法和用于烯烃在烯烃或在催化剂的存在下烯烃的聚合聚合的方法获得,其特征在于,使用本发明的催化剂的催化剂。
    • 118. 发明申请
    • PRODUCTION OF POLYETHYLENE
    • 聚乙烯的生产
    • WO00058375A1
    • 2000-10-05
    • PCT/EP2000/002279
    • 2000-03-14
    • C08F4/02C08F4/22C08F4/24C08F4/69C08F10/02C08F210/16
    • C08F10/02C08F4/24C08F210/16C08F4/69C08F210/14C08F2500/12C08F2500/07C08F2500/04C08F4/025
    • A process for producing a polyethylene resin having a monomodal molecular weight distribution in a single polymerisation reactor using a chromium-based catalyst system, by copolymerising ethylene and an alpha-olefinic-comonomer having from 3 to 8 carbon atoms, the polyethylene resin comprising a blend of a higher molecular weight fraction polymerised by a first chromium-based catalyst of the system and a lower molecular weight fraction polymerised by a second chromium-based catalyst of the system, wherein the comonomer incorporation in the higher molecular weight fraction is greater than the comonomer incorporation in the lower molecular weight fraction is greater than the comonomer incorporation in the lower molecular weight fraction whereby the higher and lower molecular weight fractions differ in density by from 0.01 to 0.03g/cc.
    • 一种使用铬基催化剂体系在单一聚合反应器中制备具有单峰分子量分布的聚乙烯树脂的方法,该方法是通过共聚合乙烯和具有3-8个碳原子的α-烯烃共聚单体,所述聚乙烯树脂包含共混物 由系统的第一铬基催化剂聚合的较高分子量馏分和由该体系的第二铬基催化剂聚合的较低分子量馏分,其中较高分子量馏分中的共聚单体引入大于共聚单体 较低分子量级分中的引入大于较低分子量级分中的共聚单体引入,由此较高分子量分数和较低分子量级分的密度在0.01至0.03g / cc之间。