Method for catalyst preparation and improved polyethylene blow molding resin
    4.
    发明授权
    Method for catalyst preparation and improved polyethylene blow molding resin 失效
    催化剂制备方法和改进的聚乙烯吹塑树脂

    公开(公告)号:US07375169B1

    公开(公告)日:2008-05-20

    申请号:US11657916

    申请日:2007-01-25

    IPC分类号: C08F4/24

    摘要: A method for polymerizing ethylene is provided. The method can include preparing a supported catalyst composition comprising the steps of: (a) dehydrating a chromium impregnated support; (b) at least partially dissolving a titanium-containing compound in one or more inert solvents to provide a solution comprising the titanium-containing compound; (c) contacting the dehydrated chromium impregnated support with the titanium-containing solution to provide a mixture comprising the solvent, titanium-containing compound and chromium impregnated support; (d) removing the solvent from the mixture; and (e) activating the product of step (d) at a temperature of at least 800° F. (427° C.) to provide a supported titanated chrome catalyst composition. The supported titanated chrome catalyst composition can be feed to a slurry reactor, and contacted with an optional co-catalyst, under polymerization conditions, with ethylene.

    摘要翻译: 提供聚合乙烯的方法。 该方法可以包括制备负载型催化剂组合物,其包括以下步骤:(a)使浸渍铬的载体脱水; (b)至少部分地将含钛化合物溶解在一种或多种惰性溶剂中以提供包含含钛化合物的溶液; (c)使脱水的铬浸渍的载体与含钛溶液接触以提供包含溶剂,含钛化合物和浸渍铬的载体的混合物; (d)从混合物中除去溶剂; 和(e)在至少800°F(427℃)的温度下活化步骤(d)的产物,以提供负载的钛化铬催化剂组合物。 负载的钛化铬催化剂组合物可以进料到浆料反应器中,并在聚合条件下与乙烯与任选的助催化剂接触。

    Polymerization process
    5.
    发明授权
    Polymerization process 有权
    聚合过程

    公开(公告)号:US06921798B2

    公开(公告)日:2005-07-26

    申请号:US10456283

    申请日:2003-06-06

    摘要: Polymerization processes are disclosed for producing polyethylene having a target density and improved environmental stress resistance. Ethylene and optionally one or more α-olefin comonomers, supported chromium catalyst, and metal alkyl cocatalyst are contacted to produce polyethylene. The density of the polyethylene is determined, and the concentration of cocatalyst is adjusted in response to a deviation between the density of the polyethylene and the target density. The catalyst and cocatalyst can be fed separately into the reactor, or can be co-fed, eliminating the need to pre-contact the catalyst and cocatalyst prior to introducing them into the reactor.

    摘要翻译: 公开了用于生产具有目标密度和改善的耐环境应力的聚乙烯的聚合方法。 乙烯和任选的一种或多种α-烯烃共聚单体,负载的铬催化剂和金属烷基助催化剂接触以制备聚乙烯。 确定聚乙烯的密度,并且响应于聚乙烯的密度和目标密度之间的偏差来调节助催化剂的浓度。 催化剂和助催化剂可以单独进料到反应器中,或者可以共同进料,而不需要在将催化剂和助催化剂引入反应器之前预接触催化剂和助催化剂。

    Catalyst system and process
    6.
    发明授权
    Catalyst system and process 有权
    催化剂系统和工艺

    公开(公告)号:US07632901B2

    公开(公告)日:2009-12-15

    申请号:US10456604

    申请日:2003-06-06

    IPC分类号: C08F4/52 C08F4/58

    摘要: Methods of making supported chromium catalyst systems and processes of polymerizing ethylene using the supported chromium catalyst systems are disclosed. A method of forming a catalyst system in a polymerization reactor includes contacting a supported chromium catalyst and a metal alkyl cocatalyst by cofeeding the catalyst and cocatalyst to the reactor or feeding the catalyst and cocatalyst separately to the reactor, to form a catalyst system. The catalyst and cocatalyst are not pre-contacted prior to the feeding or cofeeding step. The catalyst system can be contacted with ethylene and optional alpha-olefin comonomer to form polyethylene.

    摘要翻译: 公开了使用负载的铬催化剂体系制备负载型铬催化剂体系和聚合乙烯的方法。 在聚合反应器中形成催化剂体系的方法包括通过将催化剂和助催化剂共进料到反应器或将催化剂和助催化剂分别供入反应器来使负载的铬催化剂和金属烷基助催化剂接触,形成催化剂体系。 催化剂和助催化剂在进料或共进料步骤之前不预先接触。 催化剂体系可与乙烯和任选的α-烯烃共聚单体接触以形成聚乙烯。

    Method of preparing a treated support
    8.
    发明授权
    Method of preparing a treated support 失效
    制备治疗支持物的方法

    公开(公告)号:US07262259B2

    公开(公告)日:2007-08-28

    申请号:US11702717

    申请日:2007-02-06

    IPC分类号: C08F210/02 C08F210/06

    摘要: This invention relates to a method to polymerize olefins comprising contacting a solid aluminum or solid titanium compound with a supported catalyst compound, heating the solid aluminum or solid titanium compound to cause the solid compound to vaporize, optionally activating the support by oxidation, thereafter contacting the activated support with one or more olefin monomers.

    摘要翻译: 本发明涉及聚合烯烃的方法,包括使固体铝或固体钛化合物与负载的催化剂化合物接触,加热固体铝或固体钛化合物以使固体化合物汽化,任选地通过氧化活化载体,之后接触 一种或多种烯烃单体的活化载体。