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    Blow molding polyethylene resins
    5.
    发明申请
    Blow molding polyethylene resins 审中-公开
    吹塑聚乙烯树脂

    公开(公告)号：US20070027276A1

    公开(公告)日：2007-02-01

    申请号：US11190481

    申请日：2005-07-27

    Applicant: Kevin Cann ,  Ronald Eisinger ,  Mark Goode ,  John Moorehouse ,  Cliff Mure ,  Stephen Jaker ,  Maria Apecetche

    Inventor： Kevin Cann ,  Ronald Eisinger ,  Mark Goode ,  John Moorehouse ,  Cliff Mure ,  Stephen Jaker ,  Maria Apecetche

    IPC: C08F4/06

    CPC classification number: C08F210/16 ,  C08F2/34 ,  C08F4/24 ,  C08F210/08 ,  C08F2500/14 ,  C08F2500/13 ,  C08F2500/12 ,  C08F2500/04 ,  C08F210/14

    Abstract: Disclosed herein are various processes, including continuous fluidized-bed gas-phase polymerization processes for making a high strength, high density polyethylene copolymer, comprising (including): contacting monomers that include ethylene and optionally at least one non-ethylene monomer with fluidized catalyst particles in a gas phase in the presence of hydrogen gas at an ethylene partial pressure of 100 psi or more and a polymerization temperature of 105° C. or less to produce a polyethylene copolymer having a density of 0.945 g/cc or more and an ESCR Index of 1.0 or more wherein the catalyst particles are prepared at an activation temperature of 700° C. or less, and include silica, chromium, and titanium.

    Abstract translation: 本文公开了各种方法，包括用于制备高强度，高密度聚乙烯共聚物的连续流化床气相聚合方法，包括（包括）：使包含乙烯和任选的至少一种非乙烯单体的单体与流化催化剂颗粒接触 在气相存在下，在乙烯分压为100psi以上且聚合温度为105℃以下的氢气存在下，生成密度为0.945g / cc以上的聚乙烯共聚物和ESCR指数 为1.0以上，其中催化剂颗粒在700℃或更低的活化温度下制备，并且包括二氧化硅，铬和钛。

    Process for transitioning between ziegler-natta-based and chromium-based catalysts
    7.
    发明申请
    Process for transitioning between ziegler-natta-based and chromium-based catalysts 有权
    基于齐格勒 - 纳塔和铬基催化剂的转化方法

    公开(公告)号：US20060160965A1

    公开(公告)日：2006-07-20

    申请号：US11312272

    申请日：2005-12-20

    Applicant: Mark Goode ,  Kevin Cann ,  F. Hussein ,  Robert Santana ,  David Schutz ,  Agapios Agapiou

    Inventor： Mark Goode ,  Kevin Cann ,  F. Hussein ,  Robert Santana ,  David Schutz ,  Agapios Agapiou

    IPC: C08F2/38

    CPC classification number: C08F10/02 ,  C08F210/16 ,  C08F2410/05 ,  Y10S526/901 ,  C08F2/34 ,  C08F2/42 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/07 ,  C08F2500/18 ,  C08F210/08

    Abstract: Embodiments of our invention relate to processes for transitioning among polymerization catalyst systems including processes for transitioning among olefin polymerization reactions using Ziegler-Natta catalysts systems and chromium-based catalyst systems. Among embodiments contemplated are a method of transitioning from a first catalyst to a second catalyst in an olefin polymerization reactor, comprising: adding to the reactor a deactivating agent (DA) selected from one of carbon monoxide, carbon dioxide, or combinations thereof; adding to the reactor a cocatalyst adsorbing agent (CAA), comprising an inorganic oxide selected from one of silica, alumina or combinations thereof; wherein the first catalyst comprises at least one conventional Ziegler-Natta catalyst, and a cocatalyst, wherein the second catalyst comprises at least one chromium-based catalyst, wherein the reactor is a gas-phase, fluidized bed reactor, and wherein the CAA is substantially free of transition metals. In another embodiment a method of transitioning from a first catalyst to a second catalyst in an olefin polymerization reactor is contemplated, comprising: adding a transition aid agent (TAA) wherein the TAA is selected from one of alkoxylated amines, alkoxylated amides, or combinations thereof, wherein the first catalyst comprises at least one Ziegler-Natta catalyst comprising the catalyst, a cocatalyst and optionally a support, and the second catalyst comprises at least one chromium-based catalyst.

    Abstract translation: 本发明的实施方案涉及在聚合催化剂体系中过渡的方法，包括使用齐格勒 - 纳塔催化剂体系和铬基催化剂体系在烯烃聚合反应中过渡的方法。 考虑的实施方案是在烯烃聚合反应器中从第一催化剂转变为第二催化剂的方法，包括：向反应器中加入选自一氧化碳，二氧化碳或其组合中的一种失活剂（DA）; 向所述反应器中加入选自二氧化硅，氧化铝或其组合的无机氧化物的助催化剂吸附剂（CAA）; 其中所述第一催化剂包含至少一种常规齐格勒 - 纳塔催化剂和助催化剂，其中所述第二催化剂包含至少一种铬基催化剂，其中所述反应器是气相流化床反应器，并且其中所述CAA基本上 没有过渡金属。 在另一个实施方案中考虑了在烯烃聚合反应器中从第一催化剂转变为第二催化剂的方法，包括：加入转移助剂（TAA），其中TAA选自烷氧基化胺，烷氧基化酰胺或其组合之一 ，其中所述第一催化剂包含至少一种齐格勒 - 纳塔催化剂，所述催化剂包含所述催化剂，助催化剂和任选的载体，所述第二催化剂包含至少一种铬基催化剂。

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