Solvay & Cie

Pol Gerard

Andre Delbouille

Eugene Berger

Jean-Louis Derroitte

Jean-Louis Deroitte

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.

Process for the polymerization and copolymerization of olefins with a

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.

Catalyst and process for the polymerization of olefins

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.

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Braine-l'Alleud, Belgium

Pol Gerard