Abstract: A supported type catalyst component for .alpha.-olefin polymerization, having a higher activity and capable of affording a highly stereoregular polymer is provided, which component comprises a solid product (II) obtained by reacting Mg compound(s) of formula MgR.sup.1 R.sup.2 (wherein R.sup.1 is alkyl, aryl, alkoxy or aryloxy and R.sup.2, alkyl, aryl, alkoxy, aryloxy or halogen), with a complex of compound(s) selected from Al halides and Al compounds of formula AlR.sub.n.sup.3 X.sub.3-n (wherein R.sub.3 is alkyl, aryl, alkoxy or aryloxy; X, halogen; 0.ltoreq.n<2) with an organic acid ester; and reacting the resulting solid product (I) (a carrier) with a liquid halogen-containing Ti compound. Preactivation of the solid product (II) with an organoaluminum compound and an .alpha.-olefin affords a catalyst component superior in storage stability and polymerization reproducibility.

Abstract: A catalyst and method in which the catalyst is active with a cocatalyst in the polymerization and copolymerization of 1-olefins and is prepared by reacting together one or more of a specific class of organic silicon compounds, a porous support or a silicon compound treated porous support, a Group IIA organometallic compound, and a Group IVB, VB transition metal compound or mixture thereof.

Abstract: An inexpensive one-step process is disclosed for producing the lower hydrates of magnesium dihalide by comminuting hydrated magnesium dihalide and anhydrous magnesium dihalide. Also the use of such hydrous magnesium dihalide products in the olefin polymerization catalysts.

Abstract: A method is provided for preparing hydrocarbon soluble magnesium siloxide supports comprising contacting such supports with sufficient aluminum alkoxide or organic ethers to render the supports hydrocarbon soluble. Thereafter the supports are contacted with a transition metal compound and halogenated to obtain polymerization catalysts.

Abstract: Components of catalysts for the polymerization of ethylene and of mixtures thereof with other olefins, in the form of emulsions or dispersions, in an inert liquid medium or in an inert gas phase of a liquid phase, comprising a compound of a metal of Groups IV to VI inclusive, of the Mendelyeev Periodic System, or a composition containing such a compound of the Mendelyeev Periodic System, which compound or composition is immiscible with aliphatic hydrocarbons, or which components are obtained from emulsions or dispersions, in an inert liquid medium or in gas phase, of a precursor of the catalyst component which, in the liquid state, is immiscible with the aliphatic hydrocarbons.An object of this invention is to provide new catalyst components for use in the polymerization of ethylene and of mixtures thereof with olefins and the catalysts obtained therefrom.

Abstract: Spheroidal alumina particulates well adapted as catalysts or catalyst supports and having enhanced pore volumes are facilely prepared by drop coagulating an aqueous suspension or dispersion of alumina, or an aqueous solution of a basic aluminum salt, said suspension, dispersion or solution comprising an oil-in-water emulsion, and then recovering, drying and calcining the gelled particulates which result.

Abstract: A process for producing a novel highly active vanadium catalyst comprising a particulate solid produced by reacting a vanadium compound, a phosphorus compound, and an organoaluminum compound and its use in the polymerization of olefins.

Abstract: A method for the production of a solid titanium trichloride catalyst by the steps of preparing a titanium trichloride composition comprising a solid reduction product obtained by reducing titanium tetrachloride with an organoaluminum compound represented by the formula, R.sup.1.sub.n AlY.sub.3-n (wherein R.sup.1 is a hydrocarbon group having 1 to 18 carbon atoms; Y is a halogen atom or a hydrogen atom; and n is a number satisfying the equation, 1<n.ltoreq.3), or a solid product obtained by thermally treating said solid reduction product at a temperature of not more than 150.degree. C.; reacting said titanium trichloride composition in an aromatic hydrocarbon solvent with a mixture consisting of a halogen compound represented by the formula, X.sub.2 (wherein X is Cl, Br, or I), or an interhalogen compound represented by the formula, XX'.sub.a (wherein X and X' are each Cl, Br, or I, and a is 1 or 3), and an ether compound represented by the formula, R.sup.2 --O--R.sup.3 (wherein R.sup.2 and R.sup.

Abstract: A preactivated catalyst for producing .alpha.-olefin polymers is provided, which is obtained by the steps which comprises:reacting an organoaluminum compound (O-Al.sub.1) with an electron donor (ED.sub.1) to obtain a reaction product (I);reacting (I) with TiCl.sub.4 to obtain a solid product (II);reacting (II) with an electron donor (ED.sub.2) and an electron acceptor to obtain a solid product (III);combining (III) with an organoaluminum compound (O-Al.sub.2) and a reaction product (RP) of an organoaluminum (O-Al.sub.3) with an electron donor (ED.sub.3) (III), (O-Al.sub.2) and (PP) being referred to as catalyst components), and in this combination, subjecting a part or the whole of the catalyst components to polymerization treatment with an .alpha.-olefin at least in the presence of (III) and said (O-Al.sub.2) to obtain a preliminarily activated catalyst; andpolymerizing an .alpha.-olefin in the presence of the catalyst.

Abstract: Olefins are converted into other olefins having different numbers of carbon atoms by contact with a catalyst produced by combining a metal, such as tungsten or a tungsten compound, with a halosilane by adding either water or silica to the suspension of metal and halosilane and then heating to activate the catalyst.

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: A novel single-batch method for preparing carbon supported alloy catalysts, wherein one of the metals is a noble metal, preferably platinum and the other metals selected from the transition Groups IV, V, VI or VII. The process comprises sequentially adsorbing the metallic components onto the carbon support. The adsorption takes place in an aqueous medium and the metal components are introduced in the ionic form. The catalyst is finally formed by heating to an elevated temperature.

Abstract: Catalysts having high efficiency in preparing olefin polymers while controlling molecular weight distribution are disclosed. The catalysts utilize magnesium siloxide supports and the product polymer molecular weight distribution can be controlled by the catalyst preparation.

Abstract: Polysiloxanes of relatively low molecular weight are catalytically polymerized/rearranged into high molecular weight polysiloxanes in the presence of a cationic catalyst comprising a porous, inorganic mineral particulate support having an average pore diameter in excess of 20 .ANG. and a pore volume ranging from 0.2 to 2 ml/g, said porous support being coated with less than 15 mg/m.sup.2 of a film of polymeric material comprising pendant sulfonic or phosphonic acid functions, and said polymeric material being characterized by an ion exchange capacity of less than 2 milliequivalents per gram.

Abstract: A catalyst component useful for (co)polymerizing ethylene under high temperatures and pressures comprising the reaction product obtained by treating a magnesium halide supported titanium halide precursor with transition-metal halide or oxyhalide, thoroughly washing the solid reaction product therefrom and prepolymerizing the washed solid product with an alpha-olefin having from 4-12 carbon atoms.

Abstract: A catalyst component for polymerizing ethylene alone or with another alpha-olefin having from 3 to 18 carbon atoms at temperatures greater than about 150.degree. C. which catalyst component is the product obtained by treating at least one dehydrated particulate support material, such as silica, having an average particle size from about 0.05 to about 20 microns, preferably 1.0 to 10.0 microns, with(a) at least one dihydrocarbyl magnesium compound wherein the hydrocarbyl groups can be the same or different, such as butyl ethyl magnesium,(b) a transistion metal compound of Groups IVa, Va, or VIa of the Periodic Table, such as, for example, titanium tetrachloride, and (c) ethyl aluminum dichloride. In a preferred embodiment the particulate support material is treated with a halogenating agent prior to treatment with the transition metal compound.

Abstract: An ethylene polymerization catalyst comprising a supported precursor of vanadium trihalide/electron donor complex and alkylaluminum or boron halides, when combined with alkylaluminum cocatalyst and alkyl halide promoter provides enhanced polymerization and productivity plus superior polyethylene.

Abstract: Fibrous activated carbon having a pH not more than 5 which is suitable for recovering halogenated hydrocarbon solvents is disclosed. The fibrous activated carbon is obtained by acid treating raw fibrous activated carbon.

Abstract: A catalytic component for polymerizing olefins comprises a solid support containing magnesium-halogen or manganese-halogen bonds, a transition metal halide of a metal selected from Groups IVB and VB of the periodic table, and electron donors. This catalytic component is obtainable by steps comprising:(a) contacting a mixture comprising a magnesium halide or manganese halide and at least one electron donor with a Ti(OR).sub.4 compound to form a solution, where R is a hydrocarbyl or halogenated hydrocarbyl moiety containing 1 to 20 carbon atoms or a halogen, and(b) reacting the solution with a reagent comprising a transition metal halide selected from Groups IVB and VB of the periodic table,whereby, with a suitable cocatalyst, polyolefin is formed with high activity, showing a high Isotactic Index, and with a narrow range of particle size distribution.

Abstract: Method of preparing a supported Ziegler-catalyst active in the polymerization of alpha-olefins to polymers particularly suited to working by blow-moulding, by reacting:(A) an organometallic compound of aluminium, and(B) the product of the reaction of titanium and vanadium halides with a solid support obtained by the spray drying of magnesium chloride in a mixed solution of ethanol and methanol, the support containing both ethanolic and methanolic alcoholic hydroxyl groups.