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    A method of preparing low or medium-densitity straight-chain polyethylene
    1.
    发明公开
    A method of preparing low or medium-densitity straight-chain polyethylene 失效
    一种用于低或中密度的直链聚乙烯的制备方法。

    公开(公告)号：EP0243327A1

    公开(公告)日：1987-10-28

    申请号：EP87830149.8

    申请日：1987-04-16

    申请人： ENICHEM ANIC S.p.A.

    发明人： Mirra, Mauro ,  Masi, Francesco ,  Invernizzi, Renzo ,  Bani, Antonio

    IPC分类号： C08F210/02 ,  C08F4/64

    CPC分类号： C08F210/02 ,  Y02P20/52 ,  C08F4/6555

    摘要： ow or medium-density straight-chain ethylene polymers are prepared by copolymerising ethylene with a C 4 -C 6 alpha-olefin at elevated temperature and pressure in a tubular reactor and in the presence of a Ziegler-type catalyst comprising a trialkyl aluminium as co-catalyst and a solid component, the solid component being obtained:

    - by spray-drying an ethanolic solution of magnesium chloride to obtain a solid substrate of magnesium chloride particles containing alcoholic hydroxylis,
    - by reacting the substrate with titanium tetrachloride to form an activated substrate, and
    - by reacting the activated substrate with an alkyl aluminium chloride to chlorinate the titanium and partially or completely reduce the titanium from the tetravelent to the trivalent state.

    摘要翻译： 低或中密度的直链乙烯聚合物是通过在升高的温度下的C 4 -C 6α-烯烃和压力下，在管式反应器，并在齐格勒型催化剂存在下，包括三烷基铝作为助催化剂使乙烯制备 和固体成分，固体成分而得到： - 通过的氯化镁，得到氯化镁颗粒的含醇hydroxylis固体基材的乙醇溶液的喷雾干燥， - 通过用四氯化钛使下基片，以形成活化的基底，和 - 通过与烷基氯化铝起反应的活化的底物，以氯化钛和部分或完全呼叫从tetravelent到三价状态还原钛。