Abstract: A novel catalyst system for the polymerization or copolymerization as the case may be, of alpha-olefines is disclosed, which comprises a cocatalyst which is an aluminum-organic compound and a catalyst proper which is obtained by reacting metal vapors (such as vapors of Mg, Al, Ti, V, Cr, Mn, Fe or their alloys) with Ti or V compounds, a halogen donor and a hydrocarbonaceous inert diluent being possibly present. Another aspect of the invention is the conduct of the polymerization, or copolymerization, run proper. Numerous examples of practical application of the catalyst preparation and use are given and the advantages of the novel approach shown.

Abstract: Polymerization of ethylene or .alpha.-olefins using a catalyst comprising a titanium component obtained by copulverizing the starting titanium component of Ziegler catalysts and organoaluminum compound with a small amount of ethylene or .alpha.-olefins, and an organoaluminum component. The titanium catalyst component can be modified by subjecting the copulverized titanium component to a contact with an inert organic solvent or its mixture with a modifier (1) an oxygen-, sulphur-, phosphor-, nitrogen- or silicon- containing organic compound, (2) a combination of such an organic compound and an aluminum halide, (3) an organoaluminum compound or (4) a Lewis acid.

Abstract: Olefin polymerization catalyst useful in preparation of polyolefins of broad molecular weight distribution comprising (a) a component prepared by reacting an organoaluminum compound with a mixture comprising a titanium compound, a zirconium compound, and a vanadium compound; and (b) an organoaluminum promoter. The (a) component can be further treated with a deactivating agent. The olefin polymerization performance of the (a) component can be varied depending on the choice of promoter and deactivating agent.

Abstract: Polyolefin is prepared by polymerizing an olefin by using a catalyst system combining an auxiliary catalytic component of an organoaluminum compound and a solid catalytic component obtained by reacting a mixture of a vanadium trichloride ether complex and a titanium trichloride ether complex with an aluminum halide and/or a boron halide.

Abstract: An alpha-olefin such as ethylene is polymerized in the presence of a catalyst system consisting of (1) an alkyl-halide, alkyl-derivative or hydride of a metal belonging to one of the first three groups of the periodic system and (a) the combination product of a transition metal chloride and titanium trichloride said transition metal chloride being derived from the reaction of a transition metal carbonyl and titanium tetrachloride.

Abstract: A substantially agglomeration-free, finely divided catalyst component which is suitable for use as a cocatalyst with organoaluminum compounds in the polymerization of alpha olefins, which is formed by grinding a titanium trichloride material, an effective amount of an electron pair donor compound to enhance the performance of said catalyst component, and an effective amount for agglomeration control of an agglomeration control agent. The agglomeration control agent is effective in either reducing the attractive forces between the finely divided particles in the catalyst component or by preventing the close approach of these particles which would result in agglomeration.

Abstract: A method of preparing reformed titanium trichloride catalyst for .alpha.-olefin polymerization which comprises simultaneously pulverizing an organoaluminum compound and a crystalline titanium trichloride compound, the latter comprising titanium trichloride and aluminum trichloride, subsequently treating the pulverized mixture with a solvent selected from oxygen-containing organic compounds, and finally treating the thus treated titanium trichloride with a halide of a metal selected from the groups IV and V of the periodic table.

Abstract: An improvement in the method for producing ethylene polymers by using a catalyst consisting of a combination of a following solid product with an organoaluminum compound is provided.Said solid product (III) is prepared by reacting a trivalent metal halide with a divalent metal compound; reacting the resulting reaction product with a transition metal compound in the form of liquid; reacting the resulting solid product (I) with an aluminum or boron alcoholate; and reacting the resulting solid product (II) again with a transition metal compound in the form of liquid to obtain said solid product (III).Ethylene polymers obtained according to this method have broader molecular weight distributions.

Abstract: According to the present invention, there is provided a process for preparing polyolefins which comprises polymerizing or copolymerizing olefins using as catalyst a solid component containing a titanium compound and/or a vanadium compound, and an organoaluminum compound and/or an organozinc compound, said solid component being obtained by copulverizing (1) a magnesium halide and/or a manganese halide, (2) an aluminum oxyhalide and (3) a titanium compound and/or a vanadium compound.

Abstract: Ethylene is polymerized through the use of an improved catalyst system consisting of a carrier such as neodymium oxide having a high superficial area, an aluminum compound such as triisobutylaluminum and the combination product of titanium trichloride and an isostructural chloride of another transition metal prepared by impregnating the carrier with a solution of a carbonyl derivative of the other transition metal, refluxing the impregnated carrier with titanium tetrachloride until that carbonyl derivative is converted to the chloride of the other transition metal, and then removing the excess of titanium tetrachloride.

Abstract: In a process for preparing a polyolefin without separation of catalyst residues by polymerizing an olefin in the pres ence of a Ziegler catalyst having high catalytic activity, in an inert gas sealing system; an improvement comprises separating the polyolefin containing the catalyst residue from the polymerization mixture, and contacting the polyolefin containing the catalyst residue with a weak reactive gas of oxygen and/or steam diluted with an inert gas.

Abstract: Ethylene can be polymerized or copolymerized by the use of a catalyst prepared by mixing a trivalent metal halide with a metal carbonate or/and a metal hydrogen carbonate, reacting the resulting mixture with a transition metal compound in the presence of an aromatic compound, and activating the resulting solid product with an organoaluminum compound.By substituting said metal carbonate or/and metal hydrogen carbonate for metal salt hydrates, sulfide hydrates, hydroxides or hydroxide hydrates, or metal oxides in our prior art, drawbacks such as dehydrochlorination in the preparation of catalyst or difficulty in removal of catalyst residue from polymer can be overcome while various advantages in our prior art are still maintained.

Abstract: A process for polymerizing an olefin comprises effecting said polymerization in contact with a catalyst of a combination of a first solid component prepared by treating a mixture of (a) a titanium tetrahalide, (b) a vanadyl alcoholate and (c) a vanadyl trihalide, with an organoaluminum compound, and a second component of an organoaluminum compound.

Abstract: Polyethylene or copolymers of ethylene with another .alpha.-olefin can be produced by the use of a novel polymerization catalyst obtained by using, in combination, (A) a specified, hydrocarbon-insoluble solid component prepared by reacting (i) a specific, hydrocarbon-soluble organoaluminum-magnesium complex (Al.sub.n Mg.sub.m R.sub.n(3.sub.-.sub..alpha.).sup.1 -R.sub.2m.sup.2 H.sub.n, wherein R.sup.1 and R.sup.2 are hydrocarbon radicals) with (ii) a titanium or vanadium compound containing halogen atom(s), and (B) an organoaluminum compound. This catalyst exhibits a surprisingly high activity per the unit amount of the solid component.

Abstract: A process for polymerizing ethylene or a mixture of ethylene and another olefin is proposed in which the polymerization can be carried out with an extremely high efficiency by using a catalyst prepared by reacting (A) a hydrocarbon-insoluble reaction product (obtained by reacting (i) a specified organomagnesium-containing hydrocarbon-soluble complex, or reaction product of (i), with (ii) a specified siloxane compound and with (iii) at least one kind of titanium or vanadium compound containing at least one halogen atom), with (B) a specified organoaluminum compound. Resultant polymers have a high molecular weight and a high rigidity and molecular weight and molecular weight distribution thereof can be easily controlled.

Abstract: A method of preparing synthetic rubbers wherein the monomer plus vinyl chloride is contacted with a catalyst normally imparting a high trans-1,4 configuration to the polymer, resulting in a mixture of cis-1,4 and trans-1,4 homopolymers.