Process for the preparation of a catalyst component for the polymerization of an olefin

摘要

The invention is directed to a process for the preparation of a catalyst component for the polymerization of an olefin wherein a compound with formula Mg(OAlk) x Cl y wherein x is larger than 0 and smaller than or equal to 2, y equals 2-x and each Alk, independently represents an alkyl group, is contacted with a titanium tetraalkoxide in the presence of an inert dispersant to give an intermediate reaction product and wherein the intermediate reaction product is contacted with titanium tetrachloride in the presence of an internal electron donor. Preferably also an alcohol is used in the course of the treatment of the compound with formula Mg(OAlk) x Cl y with the titanium tetraalkoxide. The catalyst component of the invention is very suitable for the preparation of polyolefines by polymerising one or more olefins, in particular propylene.