Process for preparing a transition metal component on a polymeric support for an olefin polymerization catalytic system.

摘要

1. A process for preparing a new transition metal composition on a polymer carrier, which can be used as a constituent of a catalytic system for polymerization of olefins, in which method an organometallic magnesium compound is deposited on a particulate porous polymer carrier by impregnation of the said carrier with a solution of the magnesium compound in an inert solvent which does not dissolve the carrier, followed by evaporation of the solvent, and the carrier loaded with the magnesium compound is treated with a liquid phase containing at least one transition metal compound selected from Ti, V, Zr and Cr, these steps being performed at temperatures below the softening temperature of the polymer carrier, characterized in that the carrier loaded with the magnesium compound is subjected, before or after its treatment with the transition metal compound, to a chlorination treatment which is performed in the absence of solvent and at a temperature below the softening temperature of the polymer carrier, by means of a gaseous or liquid chlorination agent, the chlorination agent being used in an amount which is at least equal to the stoichiometric amount needed for complete chlorination of the organometallic compounds present in the polymer carrier.