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    Multiple-step procedure for producing a polymerization catalyst
    3.
    发明授权
    Multiple-step procedure for producing a polymerization catalyst 失效
    制备聚合催化剂的多步法

    公开(公告)号：US3905915A

    公开(公告)日：1975-09-16

    申请号：US37211073

    申请日：1973-06-21

    Applicant: EXXON RESEARCH ENGINEERING CO

    Inventor： WRISTERS HARRY J

    IPC: B01J27/10 ,  B01J37/16 ,  C08F10/00 ,  C08F110/06 ,  B01J31/02

    CPC classification number: C08F110/06 ,  B01J27/10 ,  B01J37/16 ,  C08F10/00 ,  C08F4/6552 ,  C08F4/6581 ,  C08F4/645

    Abstract: The particle size is increased and particle size range is decreased without loss of compactness in a Ziegler-type catalyst, by carrying out the reduction reaction in the presence of a preformed catalyst at a reduction rate which minimizes formation of new nuclei. The reduction of TiCl4 with diethylaluminum, ethyl aluminum dichloride, triethyl aluminum, and mixtures thereof, is exemplary. The preformed catalyst is mixed with the reactants at a low temperature at which the rate of reduction is negligible (e.g. -40* to -5* C.), and the reactants are slowly heated (0.2* C/min to 2.0* C/min) while in a well-mixed zone until a holding temperature of +25* C. to +45* C. is reached. The reactants are held at the holding temperature for 0 to 120 minutes, after which the catalyst is activated by heating at 160* C. for 1 hour. If the reduction step is to be repeated, the catalyst is not activated, but is cooled to -30* C. for repetition of the reduction step. Preferably, the reduction step is repeated three times, the catalyst in the reduction zone during the holding step providing the preformed catalyst for the following reduction procedure.

    Abstract translation: 通过在预成型催化剂的存在下以降低新型核的形成的还原速率进行还原反应，在Ziegler型催化剂中粒径增加而颗粒尺寸范围减小而不失去致密性。 二氯化铝，二乙基铝，三乙基铝及其混合物还原TiCl4是示例性的。 将预成型催化剂与反应物在低温下混合，在低温下还原速率可以忽略不计（例如-40〜-5℃），反应物缓慢加热（0.2℃/分钟至2.0℃/ min），直到达到+ 25℃至+ 45℃的保持温度。 将反应物保持在保持温度下0至120分钟，然后通过在160℃加热1小时使催化剂活化。 如果要重复还原步骤，则催化剂不被活化，而是冷却到-30℃，以重复还原步骤。 优选地，还原步骤重复三次，在保持步骤期间还原区中的催化剂提供用于以下还原过程的预制催化剂。

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