SYSTEM AND METHOD FOR CATALYST ACTIVATION
    84.
    发明申请
    SYSTEM AND METHOD FOR CATALYST ACTIVATION 有权
    催化剂活化的系统和方法

    公开(公告)号:US20110201768A1

    公开(公告)日:2011-08-18

    申请号:US12706559

    申请日:2010-02-16

    IPC分类号: C08F4/69 B01J23/26 G05D7/00

    摘要: A system and method for activating chromium catalyst, including: increasing temperature of a chromium catalyst at a first rate for a first period of time to a first temperature; and increasing temperature of the chromium catalyst at a second rate for a second period of time from the first temperature to a second temperature, wherein the first rate is greater than the second rate, and wherein the first period precedes the second period.

    摘要翻译: 一种用于活化铬催化剂的体系和方法,包括:将第一时间段的铬催化剂的温度升至第一温度; 以及以第二速率将铬催化剂的温度从第一温度升至第二温度第二时间段,其中第一速率大于第二速率,并且其中第一时段在第二周期之前。

    Methods of Activating Chromium Catalysts
    85.
    发明申请
    Methods of Activating Chromium Catalysts 有权
    活性铬催化剂的方法

    公开(公告)号:US20100075840A1

    公开(公告)日:2010-03-25

    申请号:US12565559

    申请日:2009-09-23

    IPC分类号: B01J23/26

    摘要: New methods for activating chromium catalysts for polymerization processes decrease the amount of time required for activation and increase catalyst activity. Rapid heating to a first temperature is followed by a first hold period before heating to a higher second temperature and maintaining the second temperature for a second hold period. In one aspect, the overall activation process takes less than 10 hours.

    摘要翻译: 用于活化聚合反应的铬催化剂的新方法减少了活化所需的时间和增加催化剂活性。 快速加热到第一温度之后是加热到更高的第二温度之前的第一保持期,并将第二温度保持第二保持期。 在一个方面,整体激活过程需要不到10小时。

    Polymerization catalyst systems and processes therefor and therewith
    88.
    发明授权
    Polymerization catalyst systems and processes therefor and therewith 有权
    聚合催化剂体系及其工艺及其

    公开(公告)号:US06525148B1

    公开(公告)日:2003-02-25

    申请号:US09640868

    申请日:2000-08-18

    IPC分类号: C08F452

    摘要: A copolymer of ethylene and a higher alpha olefin, preferably 1-hexene, can be produced using an activated chromium containing catalyst system and a cocatalyst selected from the group consisting of trialkylboron, trialkylsiloxyaluminum, and a combination of trialkylboron and trialkylaluminum compounds. The polymerization process must be carefully controlled to produce a copolymer resin having an exceptionally broad molecular weight distribution, extremely high PENT ESCR values, and a natural branch profile that impacts branching preferably into the high molecular weight portion of the polymer. The resulting copolymer resin is especially useful in high stiffness pipe applications.

    摘要翻译: 可以使用活化的含铬催化剂体系和选自三烷基硼,三烷基硅氧烷铝和三烷基硼和三烷基铝化合物的组合的助催化剂来制备乙烯和较高级α-烯烃(优选1-己烯)的共聚物。 聚合过程必须仔细控制,以产生具有非常宽的分子量分布,极高的PENT ESCR值和天然分支分布的共聚物树脂,其优选地影响聚合物的高分子量部分的分支。 所得共聚物树脂在高刚度管道应用中特别有用。

    System of chromium catalyst and yttrium catalyst, olefin polymerization
process, and polymer
    90.
    发明授权
    System of chromium catalyst and yttrium catalyst, olefin polymerization process, and polymer 失效
    铬催化剂和钇催化剂体系,烯烃聚合方法和聚合物

    公开(公告)号:US5399622A

    公开(公告)日:1995-03-21

    申请号:US153694

    申请日:1993-11-17

    摘要: A catalyst system for the polymerization of alpha-olefins comprising a chromium-containing catalyst and an yttrium-containing catalyst wherein the yttrium-containing catalyst is represented by the formula (Cp.sub.2 YX.sub.x).sub.y.M.sub.z L.sub.n, wherein Cp is cyclopentadienyl or cyclopentadienyl substituted with alkyl or alkyl silyl radical or radicals, X is a halogen, M is an alkali metal, L is a suitable electron donor ligand, x is 1 or 2, y is 1 or 2, z is 0 or 1, and n is a number corresponding to the value needed to form a stable complex, with the proviso that when y is 2, z and n are 0 is provided. Also disclosed is a polymerization process employing such a catalyst system, and novel olefin polymers. Polymers thus produced exhibit high bulk density and a broad molecular weight distribution.

    摘要翻译: 包含含铬催化剂和含钇催化剂的α-烯烃聚合催化剂体系,其中含钇催化剂由式(Cp2YXx)y.MzLn表示,其中Cp是环烷基或环烷基,被烷基或 烷基甲硅烷基或自由基,X是卤素,M是碱金属,L是合适的电子给体配体,x是1或2,y是1或2,z是0或1,n是对应于 形成稳定复合物所需的值,条件是当y为2时,z和n为0。 还公开了使用这种催化剂体系的聚合方法和新的烯烃聚合物。 如此制备的聚合物表现出高的堆积密度和宽的分子量分布。