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    Ethylene polymerization
    1.
    发明授权
    Ethylene polymerization 失效
    乙烯聚合

    公开(公告)号：US06632896B1

    公开(公告)日：2003-10-14

    申请号：US09447956

    申请日：1999-11-29

    Applicant: Vidar Almquist ,  Paul Allemeersch ,  Roger Goris ,  Ann Kristin Lindahl

    Inventor： Vidar Almquist ,  Paul Allemeersch ,  Roger Goris ,  Ann Kristin Lindahl

    IPC: C08F442

    CPC classification number: C08F10/02 ,  C08F2410/04 ,  C08F4/69 ,  C08F4/24 ,  C08F4/025

    Abstract: Ths invention provides a process for the preparation of a polyethylene, in particular an HDPE suitable for blow moulding of HIC, which comprises polymerizing ethylene and, optionally an ethylenically unsaturated comonomer copolymerizable therewith, in the presence of a catalyst comprising a first silica-supported chromium catalyst having a pore volume of at least 2 mL/g, a surface area of at least 350 m2/g and a chromium content of 0.1 to 1.0% by weight and a second silica-supported chromium catalyst having a pore volume of at least 2 mL/g, a surface area of at least 450 m2/g and a chromium content of 0.1 to 1.0% by weight, wherein the silica support of said first catalyst also comprises alumina and the silica support of said second catalyst also comprises titanium, and preferably a co-catalyst.

    Abstract translation: 本发明提供了一种制备聚乙烯的方法，特别是适用于HIC的吹塑成型的HDPE，其包括在包含第一二氧化硅载体的铬的催化剂的存在下聚合乙烯和任选的可与其共聚的烯属不饱和共聚单体 催化剂的孔体积为至少2mL / g，表面积为至少350μm<2 PDAT> / g，铬含量为0.1〜1.0重量％，第二二氧化硅 孔体积为至少2mL / g，表面积至少为450μm<2 PDAT> / g，铬含量为0.1至1.0重量％的载体铬催化剂， 其中所述第一催化剂的二氧化硅载体还包含氧化铝，并且所述第二催化剂的二氧化硅载体还包含钛，优选为助催化剂。

    Catalyst for the (co)polymerization of ethylene and a method for the preparation thereof
    5.
    发明授权
    Catalyst for the (co)polymerization of ethylene and a method for the preparation thereof 失效
    乙烯（共）聚合的催化剂及其制备方法

    公开(公告)号：US06780809B1

    公开(公告)日：2004-08-24

    申请号：US09601652

    申请日：2003-05-21

    Applicant: Arild Follestad ,  Vidar Almquist ,  Ulf Palmqvist ,  Harri Hokkanen

    Inventor： Arild Follestad ,  Vidar Almquist ,  Ulf Palmqvist ,  Harri Hokkanen

    IPC: B01J3100

    CPC classification number: C08F10/00 ,  C08F4/63912 ,  C08F4/63916 ,  C08F4/63925 ,  C08F4/65912 ,  C08F4/65925 ,  C08F10/02 ,  C08F110/02 ,  C08F210/16 ,  C08F4/63904 ,  C08F4/24 ,  C08F2500/12 ,  C08F2500/17 ,  C08F2500/07 ,  C08F210/14 ,  C08F2500/02

    Abstract: A particulate, modified chromium oxide catalyst for the polymerisation of ethylene or ethylene with &agr;-olefins, comprising: a) a chromium-oxide catalyst, b) a transition metal compound, and c) a catalyst activator. A method for the preparation of the catalyst comprises the steps of: a) subjecting a chromium oxide catalyst precursor, which comprises a chromium oxide compound combined with an inorganic support, to a temperature in the range of from 400 to 950° C. under oxidising conditions, and b) impregnating the obtained chromium catalyst with a catalyst activator and with a transition metal compound which comprises at least one cyclopentadienylic ring bonded to said transition metal and at least ligand selected from the group comprising alkoxy, amido and hydrocarbyl radicals, halogen and hybride bonded to said transition metal, which cyclopentadienylic ring may contain hetero atoms, be unsubstituted or substituted, be bonded to said transition metal through a bridge, and optionally annealed to other substituted or unsubstituted ring structures, and if two cyclopentadienyl rings are present they may be bonded to each other through a bridge, and c) subjecting the thus obtained particulate catalyst to drying conditions. This catalyst is suitable for producing polyethylenes under conditions of continuous feeding of all reactants.

    Abstract translation: 一种用于乙烯或乙烯与α-烯烃聚合的颗粒状改性氧化铬催化剂，包括：a）氧化铬催化剂，b）过渡金属化合物，和c）催化剂活化剂。 制备催化剂的方法包括以下步骤：a）将氧化铬催化剂前体（其包含与无机载体结合的氧化铬化合物）在400-950℃的温度下氧化 条件，以及b）用催化剂活化剂和过渡金属化合物浸渍所获得的铬催化剂，所述过渡金属化合物包含至少一个与所述过渡金属键合的环戊二烯基环和至少选自烷氧基，酰胺基和烃基的配体的卤素和 杂环结合到所述过渡金属上，该环戊二烯基环可以含有杂原子，是未取代的或被取代的，通过桥键合到所述过渡金属上，并任选地退火至其它取代或未取代的环结构，如果存在两个环戊二烯基环，则它们可以 通过桥接物彼此结合，并且c）对由此获得的颗粒催化剂进行处理 干燥条件。 该催化剂适用于在连续供给所有反应物的条件下生产聚乙烯。

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