The present invention describes a process for preparation of catalyst component comprising contacting magnesium based precursor along with an internal donor based on phenylene dioates with an acyl halides in a solvent to obtain a solid precatalyst component; and contacting the solid precatalyst component with transition metal compound to obtain the catalyst component. The present invention also relates to a process for preparatin of a catalyst system from said catalyst component and preparation of a polyolefins having free flowing characteristics with bulk densities (BD) of at least about 0.3 g/cc from the catalyst system.
本发明描述了一种制备催化剂组分的工艺,包括在溶剂中将
镁基前体和苯基二酸酯基内部供体与酰基卤化物接触,得到固体前催化剂组分;将固体前催化剂组分与过渡
金属化合物接触,得到催化剂组分。本发明还涉及一种用上述催化剂组分制备催化剂体系的工艺,以及用该催化剂体系制备具有自由流动特性、体积密度(BD)至少约为 0.3 g/cc 的聚烯烃的工艺。