Process for gas-phase polymerization of olefins

    公开(公告)号:US11098143B2

    公开(公告)日:2021-08-24

    申请号:US16649044

    申请日:2018-09-13

    Abstract: A process for the polymerization of olefins in gas phase carried out in a reactor having two interconnected polymerization zones, a first zone (riser) and a second zone (downcomer), wherein growing polymer particles: a) flow through the riser under fast fluidization conditions established by feeding a mixture of gas and liquid; b) leave the riser and enter the downcomer, through which the growing polymer particles flow downward in a densified form; and c) leave the downcomer and are reintroduced into the riser, thereby establishing a circulation of polymer between the riser and the downcomer; the reactor is operated at a temperature between 0° C. and 5° C. above the dew point of the riser gas at the operating pressure, and in the riser, besides the growing polymer particles and gas flow, an amount of liquid is present.

    NUCLEATED PROPYLENE-BASED POLYOLEFIN COMPOSITIONS
    3.
    发明申请
    NUCLEATED PROPYLENE-BASED POLYOLEFIN COMPOSITIONS 审中-公开
    基于丙烯的聚烯烃组合物

    公开(公告)号:US20160083561A1

    公开(公告)日:2016-03-24

    申请号:US14785558

    申请日:2014-03-12

    Abstract: A polyolefin composition, particularly fit for the production of extrusion blow molded articles, comprising (a) a propylene-ethylene copolymer having a content of units deriving from ethylene of 4.0% by weight or higher, and (b) a nucleating agent and having a crystallization temperature (Tc) higher than 117° C. can be obtained by copolymerizing propylene and ethylene in the presence of a catalyst system obtained by contacting a solid catalyst component comprising a magnesium halide, a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which being present in an amount from 40 to 90% by mol with respect to the total amount of donors and selected from succinates and the other selected from 1,3 diethers, an aluminum hydrocarbyl compound, and optionally an external electron donor compound.

    Abstract translation: 一种聚烯烃组合物,特别适用于生产挤出吹塑制品,其包含(a)乙烯衍生物的含量为4.0重量%以上的丙烯 - 乙烯共聚物,和(b)成核剂并具有 在通过使包含卤化镁的固体催化剂组分,至少具有Ti-卤素键的钛化合物和 至少两种电子给体化合物,其中一种以相对于供体总量为40至90摩尔%的量存在,并且选自琥珀酸盐,另一种选自1,3-二醚,铝烃基化合物和任选的 外电子给体化合物。

    PROCESS FOR THE PREPARATION OF PROPYLENE RANDOM COPOLYMERS
    9.
    发明申请
    PROCESS FOR THE PREPARATION OF PROPYLENE RANDOM COPOLYMERS 审中-公开
    制备丙烯随机共聚物的方法

    公开(公告)号:US20150284488A1

    公开(公告)日:2015-10-08

    申请号:US14436412

    申请日:2013-10-03

    Abstract: A process for the preparation of random copolymer of propylene containing up to 6.0% by weight of ethylene units, suitable for the manufacture of pipes, by copolymerizing propylene and ethylene in the presence of a catalyst system comprising the product obtained by contacting the following components:(a) a solid catalyst component comprising a magnesium halide, a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which being present in an amount from 40 to 90% by mol with respect to the total amount of donors and selected from succinates and the other being selected from 1,3 diethers,(b) an aluminum hydrocarbyl compound, and(c) optionally an external electron donor compound.

    Abstract translation: 一种制备含有至多6.0重量%乙烯单元的丙烯无规共聚物的方法,该乙烯单元通过在包含通过接触以下组分获得的产物的催化剂体系存在下共聚丙烯和乙烯来制备管道: (a)固体催化剂组分,其包含卤化镁,至少具有Ti-卤素键的钛化合物和至少两种电子给体化合物,其中一种以相对于总量为40至90摩尔%的量存在 选自琥珀酸盐,另一种选自1,3-二醚,(b)铝烃基化合物,和(c)任选的外电子给体化合物。

    PROCESS FOR THE GAS-PHASE POLYMERIZATION OF OLEFINS
    10.
    发明申请
    PROCESS FOR THE GAS-PHASE POLYMERIZATION OF OLEFINS 有权
    油相的气相聚合方法

    公开(公告)号:US20150232588A1

    公开(公告)日:2015-08-20

    申请号:US14429585

    申请日:2013-09-05

    Abstract: A process and apparatus for producing olefin polymers are disclosed, comprising:a. polymerizing one or more olefins in the gas phase, in the presence of an olefin polymerization catalyst, whereby growing polymer particles flow along a cylindrically-shaped downward path in densified form under the action of gravity so as to form a densified bed of downward-flowing polymer particles b. allowing said polymer particles to flow through a restriction of the densified bed, such restriction being positioned in a restriction zone extending from the bed upward to a distance of 15% of the total height of the densified bed; and c. metering an antistatic agent through a feed line connected to the densified bed at a feed point being located in a feed zone extending from the top of the restriction upward, to a distance five times the diameter of the section of the densified bed above the restriction.

    Abstract translation: 公开了一种用于生产烯烃聚合物的方法和设备,包括:a。 在气相中聚合一种或多种烯烃,在烯烃聚合催化剂的存在下,由此生长的聚合物颗粒在致密形式的重力作用下沿着圆柱形的向下的路径流动,以形成向下流动的致密化床 聚合物颗粒b。 允许所述聚合物颗粒流过致密化床的限制,这种限制被定位在从床向上延伸到致密化床的总高度的15%的距离的限制区域中; 和c。 通过连接到致密化床的供给管线的计量抗静电剂,所述供给管线位于从限制件的顶部向上延伸的进料区域中的进料点,距离所述限制物上方的致密化床部分的直径的五倍。

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