Process for preparing a catalyst component for propylene polymerization

摘要: The invention relates to a process for preparing polymerization catalyst component wherein solid compound with formula Mg(OR1 )xCl2-x x is larger than O and smaller 2, each R1, independently, represents an alkyl group, said being obtained by reacting Grignard alkoxy- or aryloxy-containing silane compound, contacted at least one activating selected from the group formed internal electron donors compounds of M(OR2)V-W(R3)W, M can be Ti, Zr, Hf, Al Si, R2 R3, represent alkyl, alkenyl aryl v valency w v, in presence inert dispersant give intermediate reaction product, product halogen-containing Ti-compound. A system comprising shows improved performance olefin polymerization. also making polyolefin contacting component.