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    • 37. 发明授权
    • Process for the (co)polymerization of ethylene
    • 乙烯(共)聚合的方法
    • US07019097B2
    • 2006-03-28
    • US10471497
    • 2002-03-11
    • Mario SacchettiDiego Brita
    • Mario SacchettiDiego Brita
    • C08F110/02C08F4/42
    • C08F210/16C08F4/6555C08F2/34C08F4/6492C08F210/08C08F2500/26
    • A process for the (co)polymerization ethylene, optionally in mixtures with olefins CH═CHR in which R is hydrogen or a hydrocarbyl radical with 1–12 carbon atoms, carried out in the presence of a catalyst system comprising (A) a solid catalyst component which comprises Mg, halogen an electron donor selected form ethers, esters, or amines, and Ti atoms in an oxidation state such that the weight percentage ratio between Ti(red)/Ti(tot) ranges from about 0.05 to about 1; wherein Ti(red) is the weight percentage on the solid catalyst component of the Ti atoms having a valence less than 4 and Ti(tot) is the weight percentage on the solid catalyst component of all the Ti atoms and (B) an Al-alkyl compound. The said process is capable to produce ethylene polymers with a reduced oligomers content and/or improved mechanical characteristics.
    • (共)聚合乙烯的方法,任选与烯烃CH-CHR(其中R是氢或具有1-12个碳原子的烃基)的混合物在催化剂体系存在下进行,所述催化剂体系包含(A)固体催化剂 组分,其包含Mg,卤素,选自醚,酯或胺的电子给体和氧化态的Ti原子,使得Ti(重量)/ Ti(重量比) )的范围为约0.05至约1; 其中Ti(红色)是价态小于4的Ti原子的固体催化剂组分的重量百分比,Ti(重量百分比)是固体上的重量百分数 所有Ti原子的催化剂组分和(B)Al-烷基化合物。 所述方法能够生产具有降低的低聚物含量和/或改善的机械特性的乙烯聚合物。
    • 39. 发明申请
    • Solid main catalyst component for ethylene polymerization, a process for preparing the same and a catalyst containing the same
    • 用于乙烯聚合的固体主催化剂组分,其制备方法和含有该催化剂的催化剂
    • US20040248729A1
    • 2004-12-09
    • US10833889
    • 2004-04-28
    • Mingwei XiaoShijiong YuXiaofeng Ye
    • B01J031/00
    • C08F10/00C08F110/02C08F2500/07C08F4/6555
    • The present invention provides a high-activity solid main catalyst component for ethylene polymerization, a process for preparing the same and a catalyst containing the same. The main catalyst component consists essentially of a magnesium compound, a titanium compound, an electron donor, an alkyl aluminum compound and fumed silica, and is prepared by a process comprising the step of: reacting powdered magnesium with an alkyl halide to form a magnesium compound in the nascent state; adding the magnesium compound in the nascent state together with a titanium compound and an alkyl aluminum compound into an electron donor to form a complex; adding and well dispersing a fumed silica thereto to form a homogeneous thick mixture; molding and drying the mixture to form main catalyst component particles with good particle morphology; and optionally, dispersing the main catalyst component particles into a hydrocarbon solvent or a mineral oil to form a slurry. The main catalyst component has high magnesium/titanium ratio, high titanium content, high polymerization activity, moderate initial activity so that polymerization can be stably performed, and there is little or no agglomerates during the preparation of the main catalyst component.
    • 本发明提供了用于乙烯聚合的高活性固体主催化剂组分,其制备方法和含有它的催化剂。 主催化剂组分基本上由镁化合物,钛化合物,电子给体,烷基铝化合物和热解法二氧化硅组成,并且通过包括以下步骤的方法制备,所述方法包括:使粉末状镁与烷基卤反应形成镁化合物 在新生状态; 将新生镁化合物与钛化合物和烷基铝化合物一起加入电子给体中以形成络合物; 加入并充分分散热解二氧化硅以形成均匀的稠混合物; 模塑和干燥混合物以形成具有良好颗粒形态的主要催化剂组分颗粒; 并且任选地,将主催化剂组分颗粒分散到烃溶剂或矿物油中以形成浆料。 主要催化剂组分镁/钛比高,钛含量高,聚合活性高,起始活性适中,可稳定地进行聚合,在制备主催化剂组分时几乎不发生聚集。