An olefin polymerization catalyst comprises:
(A) a solid titanium catalyst component comprising a magnesium atom, titanium atom, halogen atom and electron donor in which divalent titanium atoms account for not more than 25 atomic % of the whole titanium atom content and trivalent titanium atoms account for at least 30 atomic % of the whole titanium atom content; and
(B) an organoaluminum compound component having no halogen atom.
烯烃聚合催化剂包括
(A) 由
镁原子、
钛原子、卤素原子和电子供体组成的固体
钛催化剂组分,其中二价
钛原子占整个
钛原子含量的不超过 25 原子%,三价
钛原子占整个
钛原子含量的至少 30 原子%;以及
(B) 不含卤素原子的
有机铝化合物成分。