A solid catalyst component which can produce a-olefin polymers having a high stereoregularity and a good powder fluidity, stably and with a good efficiency in gas phase polymerization, particularly in gas phase copolymerization, a catalyst for a-olefin polymerization using the above solid catalyst component and a process for producing the above catalyst component, are provided,
which solid catalyst component is characterized in that it contains titanium as an active ingredient and is in the form of hollow fine particles, and
which process is characterized by adding a reaction product (I) of an organoaluminum compound (A) with an electron donor (B,) to TiCℓ4 and reacting these under agitation in a baffle ratio of 0.35 or less with a power required for agitation of 2.50 KW/m3 or less at a temperature of 0° to 70°C for a period of I to 10 hours and further reacting an electron donor (B2) and an electron acceptor (E) with the resulting solid product (II) to obtain a solid product (III) i.e. the solid catalyst component.
本发明提供了一种在气相聚合(尤其是气相共聚)中能稳定、高效地生产出立体规整度高、粉末流动性好的 a- 烯烃聚合物的固体催化剂组分、使用上述固体催化剂组分的 a- 烯烃聚合催化剂以及生产上述催化剂组分的工艺、
其中固体催化剂组分的特点是含有
钛作为活性成分,并呈中空细颗粒状,以及
该工艺的特征在于,将
有机铝化合物(A)与电子供体(B,)的反应产物(I)加入到 TiCℓ4 中,并在 0.35 或更小的挡板比、搅拌所需功率为 2.50 KW/m3或更低,温度为0°至70°C,反应时间为I至10小时,并进一步将电子供体(B2)和电子受体(E)与所得固体产物(II)反应,以获得固体产物(III),即固体催化剂组分。