Abstract: An unmilled catalytic component for polymerizing olefins with high activity to yield polymers with high stereoregularity and a narrow particle size distribution with a low weight percentage of small particles comprises a solid, unmilled support containing magnesium-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 obtained by steps comprising:(a) contacting a Mg(OR).sub.2 and/or Mn(OR).sub.2 compound with a Ti(OR).sub.4 compound to comprise a liquid, where R is a hydrocarbyl or halogenated hydrocarbyl moiety containing 1 to 20 carbon atoms or a halogen,(b) reacting the liquid with a fluid comprising a halogenating agent and treatment with an electron donor to form a treated solid, and(c) post-treating the solid with a transition metal halide.

Abstract: A catalyst useful for polymerizing olefins which comprises a solid catalyst component [A] and an organometallic component [B], the solid catalyst component [A] being obtained by reacting (1) an organometallic compound with (2) a transition metal compound selected from the group consisting of a titanium compound, a vanadium compound, a mixture of a titanium compound and a vanadium compound and a mixture of a titanium compound and a zirconium compound, in the presence of (3) a solid reaction product of (a) an organomagnesium compound of the formulaM.sub..alpha. MgR.sub.p X.sub.q.D.sub.rwherein.alpha., p, q and r each independently is 0 or a number greater than 0,p+q=m.alpha.+20.ltoreq.q/(.alpha.

Abstract: A catalyst component is a transition metal composition which is obtained by reacting together an inert particulate material, an organic magnesium compound, a halogen-containing compound such as carbon tetrachloride or silicon tetrachloride and a specified transition metal compound. The catalyst component obtained can be used, together with an organic metal compound, to give an olefin polymerization catalyst. The catalyst can be used to effect the polymerization of olefin monomers, for example, the copolymerization of ethylene with an alpha-olefin monomer such as butene-1 in a fluidized bed reactor.

Abstract: A titanium containing composition is obtained by contacting a magnesium halide with a non-metallic halide such as thionyl chloride, for example by grinding, and contacting the product with a titanium tetrachloride-containing material, preferably undiluted liquid titanium tetrachloride. The treatment with titanium tetrachloride may be effected by milling or by suspending the solid in the titanium tetrachloride. The solid product can be washed at least once. An ester is preferably contacted with the magnesium halide. The product obtained may be used with an organic metal compound such as aluminum triethyl and preferably a Lewis Base such as ethyl benzoate or an organic silicon compound to give olefin polymerization catalyst. When used to polymerise propylene the product obtained is highly stereoregular and the level of residual catalyst is low.

Abstract: Reaction products of organic magnesium compounds and silyl esters and/or poly (silyl esters) are contacted with transition metal compounds to yield active polymerization catalysts. In a preferred embodiment, the active polymerization catalyst is further activated by contacting with a halogenating agent soluble in a hydrocarbon solvent.

Abstract: A novel component of a catalyst for polymerization of olefins, which is highly active, exhibits high stereoregularity and also provides polymers of very uniform particle sizes. The catalyst component is a contact product of the following component A and component B:Component AA solid product obtained by mixing a solution of the following components (1) and (2) and 0.05 to 5 moles of a titanium tetrachloride precipitant per mol of the component (1) in the copresence of the following component (3), thereby to produce a solid product and then washing the solid product to remove a soluble titanium component; (1) a magnesium compound represented by the formula Mg(OR.sup.1).sub.2-n X.sub.n, wherein R.sup.1 is a hydrocarbyl having 1 to 12 carbon atoms, which is an alkyl, an aryl, an aralkyl or a cycloalkyl, or a halo-derivative thereof, X is a halogen, and n is a number satisfying 0<n.ltoreq.2; (2) a titanium compound represented by the formula Ti(OR.sup.2).sub.4 or a polymer thereof, wherein R.sup.

Abstract: A catalyst and method in which the catalyst is used in association with an aluminum cocatalyst in the polymerization and interpolymerization of 1-olefins. The catalyst is prepared by (1) reacting a mono- or polyfunctional phosphorus compound with silica, alumina or the like having surface hydroxyl groups, or a mixture thereof, in which the phosphorus compound reacts with these surface hydroxyl groups, followed by (2) reacting the product of this with a Group IIa (e.g. Mg) compound and further (3) reacting this product with a Group IVB, VB or VIB (e.g. Ti) compound. Alternatively, (1) is reacted with (3) and then with (2).

Abstract: Ethylene is homopolymerized or copolymerized with another olefin monomer in the presence of a catalyst system comprising organo metal cocatalyst and a titanium-containing catalyst component, such titanium-containing catalyst component being obtained by reacting together a porous particulate material, an organo magnesium compound, a halogen or interhalogen compound and titanium tetrachloride.

Abstract: A catalytic component for polymerization of an .alpha.-olefin is prepared through a process wherein a solid product obtained by allowing an organo-magnesium compound or a mixture of an organo-magnesium compound and an organo-aluminum compound or their reaction product to react, in the presence of an electron donor and an .alpha.-olefin, with a mixture of a halogenating agent other than a halogenated titanium compound and a titanium compound or their reaction product is treated with an alcohol and/or a phenol. The treated product may be further treated with a halogenated titanium compound. Homo- or co-polymerization of an .alpha.-olefin is carried out in the presence of a catalyst composition consisting of the catalytic component and an organo-aluminum compound or with a concomitant electron donor used together with the catalyst composition.

Abstract: An .alpha.-olefin polymerizing catalytic component is obtained by treating, with alcohol and/or phenol, a solid product obtained by allowing an organo-magnesium compound expressed by a generic formula of R'MgX' (wherein R' represents a hydro-carbon group having 1 to 20 carbon atoms and X' a halogen atom selected from the group consisting of chlorine, bromine and iodine or a hydrocarbon group having 1 to 20 carbon atoms) to react with a halogenating agent in the presence of an electron donor; by treating the treated matter with a halogen-containing titanium compound, either after heating under reduced pressure or without such heating; and by treating the product further with a mixture or a complex consisting of an organo-aluminum compound, an organic acid ester and a poly-siloxane. Homo- or co-polymerization of an .alpha.-olefin is carried out in the presence of a catalyst system comprising the catalytic component and an organo-aluminum compound.

Abstract: High activity catalysts for the polymerization of ethylene and other .alpha.-olefins are made by contacting a soluble magnesium compound of the general formula Mg(OSiR.sub.3).sub.2, wherein each R is, independently, alkyl, alkoxy or aryl, with a titanium tetralkoxide (titanate) in a saturated aliphatic hydrocarbon solution, followed by chlorination and precipitation by a suitable chlorinating agent. These catalysts show high activity for the polymerization of ethylene under slurry polymerization conditions.