Abstract: Olefins are polymerized and copolymerized in the presence of a solid catalyst which contains an organometallic compound and a solid material having at the surface thereof catalytic complexes containing a divalent metal, halogen, oxygen and a transition metal having halogenated substituents. The solid material of the catalyst is obtained by reacting a liquid halogenated derivative of a transition metal, such as TiCl.sub.4 or VOCl.sub.3 with a solid support which is a oxygenated compound of a divalent metal and which is substantially anhydrous and also substantially free of hydroxyl groups; examples of such a solid support include calcium, magnesium and zinc oxides and oxygenated salts such as nitrates, sulfates and silicates and organic carboxylate salts including salts of mono- and acetates polycarboxylic acids.

Abstract: The present invention relates to catalytic complexes for the polymerization and copolymerization of olefins comprising the reaction product of a halogenated derivative of a transition metal with a chelate organic oxygenated bivalent metal compound substantially free of hydroxyl groups; to the catalyst compositions formed by activating such complexes with an organometallic compound; and to the processes of forming such catalytic complexes and polymerizing and copolymerizing olefins utilizing such catalyst compositions.

Abstract: This invention relates to the polymerization and copolymerization of .alpha.-olefins and to catalysts and cocatalysts for that purpose wherein the polymerization is carried out in the presence of a catalyst composition comprising an organometallic compound and the cocatalyst reaction product of a halogenated transition metal compound and an organic compound of a divalent metal containing oxygen and nitrogen and being substantially free from hydroxyl groups attached to the divalent metal.