Catalyst system for improved polymerization yield
    5.
    发明公开
    Catalyst system for improved polymerization yield 失效
    聚合反应器。

    公开(公告)号:EP0531270A1

    公开(公告)日:1993-03-10

    申请号:EP92870124.2

    申请日:1992-08-17

    IPC分类号: C08F10/00 C08F4/627 C08F4/626

    摘要: The invention is for a catalyst system, a process for making the catalyst system and a process for olefin polymerization using the catalyst system. The catalyst system comprises alcohol or diethylaluminum alkoxide added to a conventional Ziegler-Natta catalyst component, an aluminum alkyl co-catalyst and, optionally, an electron donor. The aluminum alkyl is preferably triethyl aluminum
    Addition of alcohol in a range of from 0.03 to 0.25 results in a increase in catalyst efficiency and polymerization yield. Normal or linear chain alcohols, such as methanol and ethanol, seem to have a positive effect whereas branched alcohols appears to have no positive effect.
    The mole-to-mole ratio of diethylaluminum alkoxide to aluminum alkyl ranges from 0.05 to 0.2. This invention is effective for the aluminum/transition metal ratio for the polymerization of olefins ranges from about 100 to about 500. Polymerization yield increases of greater than 10% are realized. The diethylaluminum alkoxide is preferably diethylaluminum ethoxide.

    摘要翻译: 本发明涉及催化剂体系,制备催化剂体系的方法和使用该催化剂体系的烯烃聚合方法。 催化剂体系包括加入常规齐格勒 - 纳塔催化剂组分的醇或二乙基铝醇盐,烷基铝催化剂和任选的电子给体。 烷基铝优选为三乙基铝。在0.03至0.25的范围内添加醇导致催化剂效率和聚合产率的提高。 正链或直链醇如甲醇和乙醇似乎具有积极的作用,而支链醇似乎没有积极的作用。 二烷基铝与烷基铝的摩尔比摩尔比为0.05-0.2。 本发明对于烯烃聚合的铝/过渡金属比例为约100至约500有效。实现了大于10%的聚合产率增加。 二乙基烷氧基铝优选为二乙基乙氧基铝。