Abstract: Novel high pore volume, high purity alumina gels and catalysts prepared therefrom are provided by a unique alumina gel preparation comprising hydrolyzing an aluminum alcoholate in a medium of a mixture of water and acetone aging the resultant product and thereafter washing with acetone. Processes for the polymerization of olefins utilizing the afore-described alumina gels are also included herein.

Abstract: Polymeric transition metal oxide alkoxides are converted by reaction with a reducing metal having a higher oxidation potential then the transition metal to a catalyst precursor, activated with a halide to form a catalyst component for olefin polymerization. Particularly exemplified are the reaction products of partially hydrolyzed titanium alkoxides with Mg.degree., used as a catalyst component for slurry polymerizations to produce polyethylene resins.

Abstract: An olefin polymerization catalyst comprising a silica xerogel support having a pore volume greater than about 2.0 cc/g, the major portion of which volume is provided by pores having pore diameters ranging from 300 to 600 A and a surface area ranging from 200 to 500 m.sup.2 /g, and having deposited thereon a metal-containing catalytic material, such as chromium oxide, or other metal oxide. A suitable hydrogel is treated with a water miscible organic liquid to substantially displace the aqueous phase and the resultant organogel with or without intermediate drying is then impregnated by a concentrated aqueous solution of a metal salt decomposable to the oxide on subsequent calcination. Also disclosed is a polymerization process utilizing such a catalyst for the preparation of polymers and copolymers of 1-olefins having a maximum of 8 carbon atoms in the chain and having no branching nearer the double bond than the 4-position, e.g., ethylene polymers.

Abstract: Olefin polymerization catalysts comprised of a supported adduct of a trialkyl-dialkylphosphato-titanate and chromium trioxide, processes for their preparation and polymerization processes employing the same.

Abstract: Olefin polymerization catalysts comprised of a supported adduct of a trialkyl-dialkylphosphato-titanate and chromium trioxide, processes for their preparation and polymerization processes employing the same.

Abstract: Olefin polymerization catalysts are prepared by depositing an organophosphoryl chromium product and a non-volatile aluminum-containing product obtained from the reaction of an aluminum alkoxide and an aluminum salt of a lower aliphatic monocarboxylic acid on an inorganic support material and heating the support material in a non-reducing atmosphere at a temperature above about 300.degree. C. up to the decomposition temperature of the support material.

Abstract: Polymerization of 1-olefins is conducted with a supported catalyst consisting essentially of a polymeric hydrocarbon aluminate comprising at least one ##STR1## unit.

Abstract: Olefin polymerization catalysts are prepared by depositing an organophosphoryl chromium product and a non-volatile aluminum-containing product obtained from the reaction of an aluminum alkoxide and an aluminum salt of a lower aliphatic monocarboxylic acid on an inorganic support material and heating the support material in a non-reducing atmosphere at a temperature above about 300.degree. C. up to the decomposition temperature of the support material.

Abstract: Polymerization of 1-olefins is conducted with a supported catalyst consisting essentially of a polymeric hydrocarbon aluminate comprising at least one ##STR1## unit.

Abstract: An olefin polymerization catalyst is prepared by depositing the chromium (III) compound obtained from the reaction of a chromium (III) carboxylate with an aluminum alkoxide upon an inorganic support material and calcining the impregnated support material in a non-reducing atmosphere above 300.degree. C, up to the decomposition temperature of the support material to provide an activated catalyst.

Abstract: An olefin polymerization catalyst is prepared by depositing a poly (di-.mu.-dihydrocarbylphosphinatohydroxyaquochromium (III)) compound or the corresponding anhydrous compound upon an inorganic support material and calcining the impregnated support material in a non-reducing atmosphere above 300.degree. C. up to the decomposition temperature of the support material to provide an activated catalyst. The catalyst exhibits high productivity and produces polymers having high melt indices.