Catalyst for preparing polyalkenes

Claim 1

A process for preparing a catalyst component composition suitable for α-alkene polymerization reactions, which consists essentially in treating a carrier material selected from the group consisting of a solid porous particulate inorganic carrier having an average particle size of between about 0.1 and 200 microns, and composed of oxidic materials or compounds of metals from Groups I and II of the Periodic Table, and a particulate polyalkene powder, by the steps of: (a) contacting said carrier material with a first liquid phase containing an organometallic compound selected from the group consisting of an organoaluminum halide compound of the general formula R m AlX 3-m wherein each R independently represents a hydrocarbon radical with 1 to 30 carbon atoms, each X represents a halogen atom, and m is a number smaller than 3, and an ether-free solution containing an organomagnesium compound of the general formula MgR 2 ' wherein each R' independently represents a hydrocarbon radical having from 1 to 30 carbon atoms, whereafter said carrier material so treated is separated from said first liquid phase; (b) thereafter contacting said carrier material so treated with a second liquid phase containing the other organometallic compound member of said group whereafter said carrier material so treated is separated from said second liquid phase, so that said carrier material has then been contacted separately with an organoaluminum halide compound and with an organomagnesum compound; and (c) thereafter contacting said carrier material so treated with a third liquid phase containing a titanium compound selected from the group consisting of halides, alkoxides and mixtures thereof wherein said titanium is in the highest valency, so as to effect reduction of said titanium compound to a lower valency state on said treated carrier material.