The invention relates to a magnesium compound effective in producing olefin polymers having an increased bulk density and a narrowed particle size distribution, not lowering the stereospecificity of the polymers produced and not lowering the polymerization activity in producing the polymers, to an olefin polymerization catalyst comprising the compound, and to a method for producing such olefin polymers. The olefin polymerization catalyst comprises (A) a solid catalyst component prepared by contacting a magnesium compound having a specific particle size distribution index (P), a titanium compound and an electron donor compound with each other, (B) an organometallic compound, and (C) an electron donor. The olefin polymerization method comprises polymerizing an olefin in the presence of the catalyst to give olefin polymers.
本发明涉及一种能有效生产烯烃聚合物的
镁化合物,该烯烃聚合物具有更高的堆积密度和更窄的粒度分布,不会降低所生产聚合物的立体特异性,也不会降低生产聚合物时的聚合活性;本发明还涉及一种包含该化合物的烯烃聚合催化剂,以及一种生产这种烯烃聚合物的方法。烯烃聚合催化剂包括:(A)通过使具有特定粒度分布指数(P)的
镁化合物、
钛化合物和电子供体化合物相互接触而制备的固体催化剂组分;(B)有机
金属化合物;以及(C)电子供体。烯烃聚合方法包括在催化剂存在下聚合烯烃,得到烯烃聚合物。