Multimodal polyethylene obtained with multilayer chromium catalyst
    1.
    发明授权
    Multimodal polyethylene obtained with multilayer chromium catalyst 失效
    用多层铬催化剂得到的多峰聚乙烯

    公开(公告)号:US07851400B2

    公开(公告)日:2010-12-14

    申请号:US11837778

    申请日:2007-08-13

    IPC分类号: B01J21/06 B01J23/26

    摘要: The present invention concerns a catalyst for the production of high density polyethylene, by homopolymerising ethylene or copolymerising ethylene and an alpha-olefinic comonomer comprising 3 to 10 carbon atoms, prepared by the steps of: a) selecting a silica support with a specific surface area larger than 300 m2/g; b) treating the silica support with a titanium compound, in order to introduce titanium into the support, or with an aluminium compound, in order to introduce aluminum into the support; c) either treating the titanated silica support with an aluminum compound, in order to introduce aluminum into the titanated silica support, or treating the aluminated silica support with a titanium compound, in order to introduce titanium into the aluminated silica support; d) depositing a chromium compound on the titanated and aluminated silica support to form a catalyst; e) activating the catalyst of step d) under air in a fluidised bed at a temperature of from 600 to 800° C.

    摘要翻译: 本发明涉及用于生产高密度聚乙烯的催化剂,通过均聚乙烯或共聚乙烯和包含3至10个碳原子的α-烯烃共聚单体,其步骤为:a)选择具有比表面积的二氧化硅载体 大于300 m2 / g; b)用钛化合物处理二氧化硅载体,以便将钛引入载体或用铝化合物,以便将铝​​引入载体中; c)用铝化合物处理钛酸二氧化硅载体,以便将铝​​引入钛酸二氧化硅载体中,或用钛化合物处理铝化二氧化硅载体,以便将钛引入到铝化硅载体中; d)在钛酸化和镀铝的二氧化硅载体上沉积铬化合物以形成催化剂; e)在600至800℃的温度下在流化床中在空气下活化步骤d)的催化剂。

    Multimodal polyethylene obtained with multilayer chromium catalyst
    5.
    发明授权
    Multimodal polyethylene obtained with multilayer chromium catalyst 失效
    用多层铬催化剂得到的多峰聚乙烯

    公开(公告)号:US07271122B2

    公开(公告)日:2007-09-18

    申请号:US10297710

    申请日:2001-06-07

    IPC分类号: B01J23/26

    摘要: The present invention concerns a catalyst for the production of high density polyethylene, by homopolymerising ethylene or copolymerising ethylene and an alpha-olefinic comonomer comprising 3 to 10 carbon atoms, prepared by the steps of: a) selecting a silica support with a specific surface area larger than 300 m2/g; b) treating the silica support with a titanium compound, in order to introduce titanium into the support, or with an aluminium compound, in order to introduce aluminium into the support; c) either treating the titanated silica support with an aluminum compound, in order to introduce aluminum into the titanated silica support, or treating the aluminated silica support with a titanium compound, in order to introduce titanium into the aluminated silica support; d) depositing a chromium compound on the titanated and aluminated silica support to form a catalyst; e) activating the catalyst of step d) under air in a fluidised bed at a temperature of from 600 to 800° C.

    摘要翻译: 本发明涉及用于生产高密度聚乙烯的催化剂,通过均聚乙烯或共聚乙烯和包含3至10个碳原子的α-烯烃共聚单体,其步骤为:a)选择具有比表面积的二氧化硅载体 大于300 m2 / g; b)用钛化合物处理二氧化硅载体,以便将钛引入载体或用铝化合物,以便将铝​​引入载体中; c)用铝化合物处理钛酸二氧化硅载体,以便将铝​​引入钛酸二氧化硅载体中,或用钛化合物处理铝化二氧化硅载体,以便将钛引入到铝化硅载体中; d)在钛酸化和镀铝的二氧化硅载体上沉积铬化合物以形成催化剂; e)在600至800℃的温度下在流化床中在空气下活化步骤d)的催化剂。

    Olefin Polymerization Process in the Presence of an Anti-Fouling Agent
    9.
    发明申请
    Olefin Polymerization Process in the Presence of an Anti-Fouling Agent 失效
    抗结垢剂存在下的烯烃聚合方法

    公开(公告)号:US20080119622A1

    公开(公告)日:2008-05-22

    申请号:US10587109

    申请日:2005-02-08

    IPC分类号: C08F2/00

    摘要: An olefin polymerisation process carried out in the presence of an anti-fouling agent and a chromium-type catalyst or Ziegler Natta catalyst; characterised in that the anti-fouling agent comprises an anti-fouling polymer having an average molecular weight (Mw) of greater than 1000 daltons and containing: (1) one or more blocks —(CH2—CH2—O)k— where each k is in the range from 1 to 50; and (2) one or more blocks —(CH2—CH(R)—(O)n where R comprises an alkyl group having from 1 to 6 carbon atoms and each n is in the range from 1 to 50, and terminated by a R′ and a R″ end groups, wherein R′ is OH or an alkoxy having from 1 to 6 carbon atoms and R″ is H or an alkyl having from 1 to 6 carbon atoms.

    摘要翻译: 烯烃聚合方法在防结垢剂和铬型催化剂或齐格勒纳塔催化剂存在下进行; 其特征在于防结垢剂包含平均分子量(Mw)大于1000道尔顿的防污聚合物,其含有:(1)一个或多个嵌段 - (CH 2 CH 2 -CH 其中每个k在1至50的范围内; (2)一个或多个嵌段 - (CH 2 CH 2) - (O)n N,其中R包括具有1至6个碳原子的烷基和 每个n在1至50的范围内,并由R'和R“端基封端,其中R'是OH或具有1至6个碳原子的烷氧基,R”是H或具有 1至6个碳原子。

    Production of polyethylene
    10.
    发明授权
    Production of polyethylene 失效
    生产聚乙烯

    公开(公告)号:US06423792B1

    公开(公告)日:2002-07-23

    申请号:US09538250

    申请日:2000-03-29

    IPC分类号: C08F422

    摘要: 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 0.03 g/cc.

    摘要翻译: 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,由此较高和较低分子量级分的密度差为0.01至0.03g / cc。