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    Method of reducing tube plugging using preactivated unsupported catalysts
    4.
    发明授权
    Method of reducing tube plugging using preactivated unsupported catalysts 失效
    使用预活化的无载体催化剂减少管堵塞的方法

    公开(公告)号：US06251817B1

    公开(公告)日：2001-06-26

    申请号：US09223399

    申请日：1998-12-30

    Applicant: Kersten Anne Erickson ,  Lewis Joe Fouts, Jr.

    Inventor： Kersten Anne Erickson ,  Lewis Joe Fouts, Jr.

    IPC: B01J2106

    CPC classification number: C08F10/00 ,  C08F4/65927 ,  C08F110/02 ,  C08F110/06 ,  Y10S526/943 ,  C08F4/65912

    Abstract: Preactivated unsupported catalysts are prepared by contacting an unsupported olefin polymerization catalyst precursor with an activator, or co-catalyst in a suitable reaction medium and then contacting the mixture with additional solvent to form a preactivated unsupported olefin polymerization catalyst composition. The preactivated unsupported olefin polymerization catalyst composition is useful in a method of polymerizing an olefin monomer by adding it, in solution or slurry, to a gas phase polymerization reactor together with one or more olefins to form a polymer, copolymer, terpolymer, or the like. The use of the preactivated unsupported olefin polymerizaiton catalysts compositions does not plug the catalyst injection nozzle or feed tube when feeding the solution to the gas phase reactor.

    Abstract translation: 通过使未负载的烯烃聚合催化剂前体与活化剂或助催化剂在合适的反应介质中接触然后使该混合物与另外的溶剂接触以形成预活化的未负载的烯烃聚合催化剂组合物来制备预活化的未负载的催化剂。 预活化的未负载的烯烃聚合催化剂组合物可用于聚合烯烃单体的方法，其通过在溶液或浆料中与一种或多种烯烃一起加入到气相聚合反应器中以形成聚合物，共聚物，三元共聚物等 。 使用预活化的未负载的烯烃聚合催化剂组合物在将溶液供给气相反应器时不会堵塞催化剂注入喷嘴或进料管。

    Process for producing polypropylene impact block copolymers
    5.
    依法登记的发明
    Process for producing polypropylene impact block copolymers 失效
    生产聚丙烯冲击块共聚物的方法

    公开(公告)号：USH1722H

    公开(公告)日：1998-04-07

    申请号：US436808

    申请日：1995-05-05

    Applicant: Mark Gregory Goode ,  Kersten Anne Erickson ,  James Douglas McCullough, Jr.

    Inventor： Mark Gregory Goode ,  Kersten Anne Erickson ,  James Douglas McCullough, Jr.

    IPC: C08F297/08 ,  C08F4/649

    CPC classification number: C08F297/08

    Abstract: A process for producing a polypropylene impact copolymer by polymerizing propylene and optionally a monomer selected from the group consisting of ethylene, butene-1, pentene-1, and hexene-1 in a first reactor in the presence of a titanium, magnesium, halogen, and a inside electron donor catalyst, an organoaluminum cocatalyst, and an outside electron donor, R.sup.1.sub.2 Si(OR.sup.2).sub.2, to produce a first polymer which enters a second reactor where it is reacted with propylene and another monomer in the absence of additional catalyst and in the presence of a third electron donor, Si(OR.sup.3).sub.4 is provided.

    Abstract translation: 在第一反应器中，在钛，镁，卤素等的存在下，聚合丙烯和任选的选自乙烯，丁烯-1，戊烯-1和己烯-1的单体，制备聚丙烯抗冲共聚物的方法， 和内部电子供体催化剂，有机铝助催化剂和外部电子供体R12Si（OR2）2，以产生进入第二反应器的第一聚合物，其中在不存在另外的催化剂的情况下，其与丙烯和另一种单体反应，并且在 提供第三电子给体Si（OR 3）4的存在。

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