Abstract: A transition metal composition has the formula:TiCl.sub.3 (AlR.sub.x X.sub.3-x).sub.n E.sub.a L.sub.bwhere E is an ether or thioether; L is a defined ester, an amine or a ketone; and a and b are each greater than 0.001 and not more than 0.50. The composition has a low surface area, typically less than 50 m.sup.2 /g. The composition can be prepared by reacting titanium tetrachloride with an organo-aluminium compound, optionally heating the reaction product, contacting the reaction product at an elevated temperature with at least one of E and L and washing the product subsequent to the treatment with E. In the composition, E is conveniently di-n-butyl ether or di-isoamyl ether and L can be tetramethylethylenediamine; ethyl benzoate; benzophenone; glycerol monostearate; glycerol triacetate; glycerol tripalmitate; glycerol trimethacrylate; pentaerythritol tetra-acrylate or ethyl phenyl acetate. The composition can be used as a component of a catalyst for the polymerization of olefine monomers such as propylene.

Abstract: A process for producing .alpha.-olefin polymers is provided, which comprises: reacting an organoaluminum compound with an electron donor in a specified ratio in a solvent at a specified temperature to obtain a solid product (I); reacting solid product (I) with TiCl.sub.4 at a specified temperature in a specified ratio of Al/Ti and then removing a liquid portion from the resulting material followed by washing to obtain a solid product (II) having no free TiCl.sub.4 ; reacting solid product (II) with an electron donor and an electron acceptor in a specified ratio at a specified temperature to obtain a solid product (III); and polymerizing .alpha.-olefin(s) in the presence of a catalyst comprising a combination of solid product (III) with an organoaluminum compound. This process provides a catalyst having a high storing and thermal stability and a polymer having a uniform particle size.

Abstract: A catalyst system for the preparation of homopolymers and copolymers of alpha monoolefins comprising (1) a titanium halide of the formulaTiCl.sub.3.m AlCl.sub.3where m is a number from 0 to 0.5, (2) an ester of a carboxylic acid having an oxygen, nitrogen, or sulfur-containing heterocyclic structure, and (3) an appropriate conventional aluminum alkyl.

Abstract: Propylene is polymerized in the presence of a catalytic system of the type which comprises a solid titanium trichloride-based complex serving as a catalyst, said complex having an atomic ratio of aluminum to titanium in the range of below 0.15:1 and containing a complexing agent, and an organic aluminum compound of the general formula, AlR.sup.1.sub.n Cl.sub.3-n wherein R.sup.1 represents an n-propyl group or an n-hexyl group and n is a value of 1.95-2.10. The catalytic system may further comprise an electron-donor compound as a third catalytic component.

Abstract: A catalyst system useful for the polymerization of olefins which comprises(A) at least one organometallic compound of a typical metal belonging to I, II and III group of Periodic table,(B) a reaction production of (i) a solid organomagnesium compound of the formula: MgR.sub.l X.sub.2-1..alpha.D wherein R is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom, D is a Lewis base, l is a number in the range of 0<l<2 and .alpha. is a number in the range of 0.ltoreq..alpha.<1.5, (ii) a phenol compound, (iii) a Lewis base, and (iv) a titanium compound and/or vanadium compound, and optionally(C) a Lewis base in an amount of up to 1 mole to 1 mole of the component (A),and a process for homo- or copolymerization of olefins by using the catalyst system. The catalyst system of the present invention shows excellent activities not only per the transition metal compound but also per the solid catalyst and can give polyolefins having a high stereo-regularity.

Abstract: A supported high efficiency catalyst component for polyolefin production and methods of making and using the same are disclosed. An enhanced support made from the materials comprising a support base, an inorganic Lewis acid and an electron donor is combined with an active transition metal compound and optionally a second electron donor to form the catalyst component. Additionally, a dehydrating agent may be pre-combined with the support base in the production of the catalyst support. The methods of producing such catalyst supports and catalyst components are performed by milling in the absence of any solvent. Such catalysts produce polymer of such high quality and quantity that polymer extraction and polymer deashing are not necessary.

Abstract: Interpolymers of alpha-olefins and nonconjugated alpha, omega-polyenes are prepared by organoaluminum compound-transition metal compound catalysts modified with hexaalkylphosphoric triamides or at least one compound of the formula Q=P(X Y).sub.3, wherein P is phosphorous, Q is oxygen or sulfur, X is oxygen or sulfur and Y is a hydrocarbon radical containing 1 to 20 carbon atoms.

Abstract: A process for the polymerization of an olefin which comprises polymerizing an olefin in the presence of a catalyst system consisting essentially of(A) an organoaluminum compound represented by the formula: AlR.sub.m.sup.1 X.sub.3-m.sup.1 wherein R.sup.1 is a hydrocarbon group having 1 to 8 carbon atoms, X.sup.1 is a halogen atom or an alkoxy group having 1 to 8 atoms and m is a number in the range of 1 to 3,(B) a product prepared by the reaction of (i) a titanium compound selected from the group represented by the formula: Ti(OR.sup.2).sub.p X.sub.q.sup.2 wherein R.sup.2 is a hydrocarbon group having 1 to 8 carbon atoms, X.sup.2 is a halogen atom and p and q are each a number satisfying the following ranges: 0.ltoreq.p.ltoreq.4, 0.ltoreq.q.ltoreq.

Abstract: Improved catalysts are disclosed for producing highly crystalline alpha-olefin polymers and highly crystalline copolymers of an alpha-olefin with ethylene or other olefins. Such catalysts can reduce the amount of coproduced amorphous polymer formed without substantial adverse effect on polymerization yield. These novel catalysts involve improving an alkylaluminum component-titanium chloride catalyst by using such catalyst in combination with effective amounts of sulfur dioxide and certain amines. Such catalyst compositions are useful in slurry polymerization, bulk polymerization and, particularly, vapor phase polymerization.

Abstract: Catalysts for polymerization of olefin which comprise a solid catalyst component (A) and an organometallic compound with a heterocyclic carboxylic acid ester (B), wherein the solid catalyst component (A) is obtained by reacting or/and grinding a special magnesium compound (1), a titanium halide (2) and a carboxylic acid ester (3); and the heterocyclic carboxylic acid ester is N-, S- or O-containing heterocyclic compound, and processes for polymerization of olefin employing such a catalyst.

Abstract: Propylene is polymerized with an improved titanium chloride catalyst. The improved titanium chloride catalyst is prepared by treating TiCl.sub.4 with an aluminum alkyl and treating the resulting titanium chloride catalyst with carbon dioxide and a Lewis base, such as di(n-butyl) ether in a hydrocarbon medium at an elevated temperature.

Abstract: A process for polymerizing an .alpha.-olefin comprising contacting the olefin in liquid phase at a temperature of about 120.degree. to 320.degree. C. with a catalyst comprising a component (A) and an organometal component (B), the component (A) being produced by reacting a hydrocarbon-soluble organomagnesium component (i) of the formula,M.sub..alpha. MgR.sub.p.sup.1 R.sub.q.sup.2 X.sub.r.sup.1 X.sub.s.sup.2 D.sub.t.alpha., p, q, r, s and t each independently is O or a number greater than 0,p+q+r+s=m.alpha.+2O.ltoreq.(r+s)/(.alpha.+1)<2,m is the valence of M, M is a metal of the 1st to 3rd groups of the Periodic Table,R.sup.1 is a hydrocarbon group having 1 to 20 carbon atoms, R.sup.2 is a secondary or tertiary alkyl group having 3 to 20 carbon atoms,X.sup.1 and X.sup.2 each independently is a hydrogen atom or an organic electronegative group containing O, N or S,D is an electron donor,with a compound (ii) of the formula,R.sub.a.sup.3 C Y.sub.4-awhereinR.sup.

Abstract: Polyolefin granules having an average particle size diameter greater than 600 microns, preferably about 1000 microns or greater are obtained by polymerizing monoolefins in the presence of a titanium catalyst having an average particle size diameter of greater than about 35 microns and preferably 40 to 65 microns. The titanium catalysts are obtained by reducing titanium tetrahalide in the presence of a suitable organometallic reducing compound such as diethylaluminum chloride under controlled conditions of temperature, reduction rate and concentrations to obtain a titanium halide reduced solids product seeds having an average particle size diameter of about 20 microns or greater and thereafter simultaneously and without interruption adding to the seeds containing system titanium tetrahalide and organometallic reducing compound such as diethyl aluminum halide at a rate such that the reduction of titanium tetrahalide to titanium trihalide is about 6.times.10.sup.-4 to about 0.

Abstract: A catalyst for the solution polymerization of .alpha.-olefins is prepared by admixing component (A) with an organometal component (B), component (A) being prepared by reacting a specific hydrocarbon-soluble organomagnesium compound with an aluminum compound and contacting the obtained product with a titanium and/or vanadium compound.

Abstract: A component of a polymerization catalyst is prepared by reacting an organomagnesium halide with a solid, inorganic oxide, then reacting the product with a Lewis Base compound, particularly an ester and finally with titanium tetrachloride. After reacting the organo-magnesium halide with the inorganic oxide it may be treated with a halogenating agent before it is reacted with the Lewis Base compound. The product obtained is combined with an organo-aluminium compound preferably together with a Lewis Base and used to polymerize an olefin monomer particularly propylene or mixtures of ethylene and a 1-olefine containing at least 4 carbon atoms. The catalyst system has a high activity, is stereospecific and has a lower proportion of halogen than some other catalyst systems.

Abstract: An olefin polymerization catalyst composition comprising:(a) a reaction product of an organo aluminium compound and an electron donor, and(b) a product obtained by contacting a solid component comprising a magnesium halide in which the atomic ratio of chlorine to magnesium is at least 1.2, a titanium halide and an electron donor, with a halohydrocarbon and with a tetravalent titanium compound.

Abstract: In a continuous process for producing a polymer or copolymer of an alpha-olefin in a hydrocarbon solvent in the presence of a catalyst comprising a transition metal compound and an organoaluminum compound, the improvement wherein[I] polymerization or copolymerization is carried out in the presence of a catalyst composed of(A) a magnesium compound in the liquid state which is soluble in said hydrocarbon solvent and is free from an organoaluminum compound and a transition metal compound, said magnesium compound being obtained from specific reactants,(B) a transition metal compound in the liquid state, and(C) an organoaluminum compound, and[II] said polymerization or copolymerization is carried out while feeding said compound (C) into a polymerization or copolymerization zone separately from said other compounds (A) and (B), or while adding a part or the whole of said compound (C) to a liquid mixture of said other compounds (A) and (B) and feeding the resulting mixture into said zone, or while feeding a mixture

Abstract: A titanium trichloride catalytic complex is produced by reducing titanium tetrachloride with an organo-metal compound and then treating the resulting reduced solids product with a chlorinated saturated hydrocarbon having two carbon atoms in the presence of a complexing agent. The resulting titanium trichloride complex composition, when employed as a co-catalyst with an organo-metal compound for Ziegler-type catalysts in polymerization of .alpha.-olefins, results in uniform polymer grains with unexpectedly high polymerization activity and high stereoregular polymer yielding ratios.

Abstract: An alpha olefin is polymerized to obtain highly crystalline polymers by subjecting the alpha olefin to polymerization conditions using as a catalyst therefor the reaction product of (A) an aluminum hydrocarbyl treated with an electron donor compound and (B) a support containing chlorine, bromine and magnesium, wherein the molar ratio of bromine to chlorine ranges between about 1:99 to about 50:50, preferably between about 2.5:97.5 to about 20:80, and most preferably between about 2.5:97.5 to about 15:85, obtained by reacting an organo magnesium compound with a mixture of chlorinated and brominated aluminum compounds, the support having been additionally treated with an electron donor compound and with titanium tetrachloride. The molar ratio of magnesium to combined chlorine and bromine in the support is not critical but generally ranges between about 1:1.6 and about 1:2.0, preferably between about 1:1.8 and about 1:2.0.

Abstract: A novel catalyst and process for producing highly-crystalline polypropylene or pure block or terminal block types of copolymers of propylene and ethylene or propylene and another alpha-olefin in excellent yields which coproduce minor amounts of low-molecular-weight and, particularly, amorphous polymers. The catalyst comprises an aluminum alkyl compound, titanium trichloride, a sterically-hindered cyclic amine and an organotin sulfide. This novel catalyst and process are useful in polymerization techniques which use a polymerization medium or those in which the condensed monomer is polymerized from the liquid phase or those in which polymerization is accomplished from monomer substantially in the vapor phase.

Abstract: A new improved catalyst system for alpha-olefin type polymerizations, includes at least one metal alkyl compound having the formula R.sub.3 '' M in combination with a Group IVB-VIII transition metal compound on a support and at least one hindered Lewis base and at least one unhindered Lewis base wherein R is selected from the group consisting of C.sub.1 to C.sub.20 secondary or tertiary alkyl, cycloalkyl, alkenyl or aralkyl groups; M is selected from the group consisting of aluminum, gallium, or indium. The improved catalyst system provides polymers having increased isotactic stereoregularity as well as lower catalyst residue.

Abstract: A process for producing .alpha.-olefin polymers is provided which comprises:reacting an organoaluminum compound (A.sub.1) with an electron donor (B.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 (B.sub.2) and an electron acceptor to obtain a solid product (III);combining (III) with an organoaluminum compound (A.sub.2) and a reaction product (G) of an organoaluminum (A.sub.3) with an electron donor (B.sub.3) ((III), (A.sub.2) and (G) 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 (A.sub.2) to obtain a preliminarily activated catalyst;andpolymerizing an .alpha.-olefin in the presence of the catalyst.

Abstract: A new improved catalyst system for alpha-olefin type polymerizations, includes at least one metal alkyl compound having the formula R'"M in combination with a Group IVB-VIII transition metal compound on a support and at least one hindered Lewis base and one unhindered Lewis base and a Group IA-IIIA metal salt of a sterically hindered carboxylate, alkoxide or aryloxide, wherein R'" is selected from the group consisting of C.sub.1 to C.sub.20 primary alkyl, alkenyl or aralkyl groups, or a hydride, and M is selected from the group consisting of aluminum, gallium, or indium. The improved catalyst system provides polymers having increased isotactic stereoregularity as well as lower catalyst residue.

Abstract: A method for producing crystalline copolymers of propylene (major component), ethylene and an .alpha.-olefin having 4 to 12 carbon atoms, superior in any of various practical physical properties such as cold-resistance, transparency, heat-seal temperature, percentage shrinkage, etc. is provided, wherein a catalyst solution obtained by mixing together a titanium trichloride composition (obtained by mixing and milling a titanium trichloride with a mixed reaction product of TiCl.sub.4 with an ether), a dialkylaluminum halide, an electron-donor compound and an inert solvent, is activated in advance of copolymerization, by feeding propylene into the solution under specified feeding conditions, and copolymerization is carried out by feeding propylene and said .alpha.-olefin simultaneously and continuously, while feeding ethylene intermittently into the gas phase part of the polymerization zone containing the solution.

Abstract: A component of a polymerization catalyst is prepared by reacting an organo-magnesium compound, or a complex with an organo-aluminium compound, with a solid, inorganic oxide, then with a halogenating agent such as silicon tetrachloride or hydrogen chloride, and then reacting the product with a Lewis Base compound, particularly an ester and finally with titanium tetrachloride. The product obtained is combined with an organo-aluminium compound, preferably together with a Lewis Base, and used to polymerize an olefin monomer particularly propylene or mixtures of ethylene and a 1-olefin containing at least 4 carbon atoms. The catalyst system has a high activity, is stereospecific and has a lower proportion of halogen than some other catalyst systems.

Abstract: A transition metal compound containing at least one .pi.-bonded arene is contacted with an inorganic oxide, hydroxide, oxyhalide, hydroxyhalide or halide. The transition metal compound can be a compound such as titanium(O)ditoluene or TiCl.sub.2.2AlCl.sub.3 durene. The inorganic compound is preferably of high surface area and this may be inherent in the compound or can be achieved by a grinding procedure. The inorganic compound can be treated with a halogen containing compound either before, during or after the contacting with the transition metal compound. The product of the contacting is useful either as catalyst for the polymerization of unsaturated hydrocarbon monomers or as a component of such a catalyst. When used as a component of an olefine polymerization catalyst, the transition metal product can be mixed with an organo-aluminum compound and a Lewis Base compound such as an ester.

Abstract: This invention relates to improved catalysts for the polymerization of propylene and higher .alpha.-olefin in a high temperature solution process comprising (1) a beta amino carboxylic ester, (2) an aluminum trialkyl and (3) a transition metal halide. More particularly, this invention relates to catalysts for the catalytic high temperature solution polymerization of .alpha.-mono-olefins containing at least 3 carbon atoms to form solid, highly crystalline polymers. More specifically, the catalysts of the present invention produce polypropylene in a high temperature solution process at very high polymer to catalysts yields.

Abstract: A process for the manufacture of poly-.alpha.-olefins by polymerizing .alpha.-olefins by means of a catalyst system comprising (1) a titanium-containing component obtained from (1.1) a compound of the formula TiCl.sub.3.1/3AlCl.sub.3 and (1.2) an organic electron donor, containing phosphorus, nitrogen and/or oxygen atoms, which has been milled with the compound of the formula TiCl.sub.3.1/3AlCl.sub.3 (1.1), in order to form a complex compound, the milling being carried out without assistants or additives in a vibratory ball mill under specific acceleration conditions and at a temperature which is from 4.degree. to 10.degree. C. below the temperature at which the particles of the material being ground begin to agglomerate, and (2) an aluminum-containing component, in which process the titanium-containing component (1) of the catalyst system used is one which has been treated, after milling and before polymerization, with (i) titanium tetrachloride and (ii) an ether and/or an ester.

Abstract: A titanium trichloride catalyst component containing a minor amount of prepolymerized alpha-olefin and useful in the polymerization of alpha-olefins is produced by reducing titanium tetrachloride with an organoaluminum compound at low temperatures and then treating the resulting reduced solids product with about 1 to 1,000 wt. % alpha-olefin so as to obtain a prepolymerized titanium trichloride reduced solid. The prepolymerized reduced solid can thereafter be activated to a highly active prepolymerized titanium trichloride by treating the prepolymerized reduced solid with a halogenated hydrocarbon and a Lewis base complexing agent or titanium tetrachloride and a Lewis base complexing agent. The prepolymerized reduced solid and the prepolymerized activated titanium trichloride manifests substantially no evidence of friability upon being subjected to mechanical shearing forces.

Abstract: A process for preparing an olefin polymer or copolymer by polymerizing or copolymerizing an olefin containing at least 3 carbon atoms which may contain at most 10 mole % of ethylene and/or a diene, in the presence of a catalyst composed of (A) a solid titanium catalyst component prepared by(1) reacting a mechanically pulverized product of an organic acid ester and a halogen-containing magnesium compound, with an active hydrogen-containing organic compound in the absence of mechanical pulverization,(2) reacting the resulting reaction product with an organometallic compound of a metal of Groups I to III of the periodic table in the absence of mechanical pulverization, and(3) washing the resulting solid reaction product with an inert organic solvent, reacting the washed solid reaction product with a titanium compound in the absence of mechanical pulverization, and separating the solid from the reaction system,and (B) an organometallic compound of a metal of Groups I to III of the periodic table; and a catalyst u

Abstract: A process for making crystalline polymers or copolymers of alpha-olefins containing 3 to 8 carbon atoms, such as polypropylene, by polymerization with a catalyst consisting of a combination of titanium chloride and an organic aluminium compound, in the presence of a stereospecificity additive.This stereospecificity additive is a cyclic polyether of the crown ether type, which may contain sulphur atoms and/or nitro radicals; this additive may be used together with an activator.The process produces polymers or copolymers with a high isotacticity index, while keeping catalyst activity sufficiently high.

Abstract: A catalyst system prepared by mixing components (A), (B) and (C):(A) a solid titanium component prepared from an organo-magnesium compound, a silicon halide compound and/or an aluminum halide compound, an electron donor and TiCl.sub.4,(B) an organoaluminum activator, and(C) an electron donor.

Abstract: A new improved catalyst system for alpha-olefin type polymerizations includes a metal alkyl cocatalyst having the formula T.sub.n MR'.sub.3-n in combination with a Group IVB-VIII transition metal compound on a support and a Lewis base wherein n is equal to one or two, T is equal to R.sub.3 DCH.sub.2, and wherein D is selected from the group consisting of Si, Ge or Sn, R is methyl or ethyl, and R' is selected from the group consisting of C.sub.1 to C.sub.8 primary alkyl or aralkyl groups including unhindered branched groups and M is selected from the group consisting of aluminum, gallium, or indium. The improved catalyst system provides both increased polymerization activity and polymers having a high degree of isotactic stereoregularity as well as lower catalyst residue.

Abstract: A process for producing a propylene polymer or copolymer which comprises polymerizing (a) propylene or (b) a mixture of propylene and another unsaturated hydrocarbon monomer in liquid propylene in the presence of a catalyst system of(A) a specified titanium trichloride composition obtained by reducing titanium tetrachloride with an organoaluminum compound and activating the product;(B) an organoaluminum compound having the general formulaR.sub.2 AlXwherein R represents an alkyl group or an aralkyl group, each containing up to 18 carbon atoms, and X represents a halogen atom; and(C) an unsaturated carboxylic acid ester; while adjusting the amount of the polymer produced to at least 8,000 g per gram of the titanium trichloride composition.

Abstract: There are disclosed new catalyst-forming components obtained by reacting at least the following substances:(a) a halogenated Ti compound containing at least one Ti-halogen bond;(b1) a support an essential constituent of which is a mixture of an oxygenated Mg compound with an adduct between a Mg dihalide and at least one electron-donor compound and/or with the product of de composition of said adduct containing Mg dihalide; and/or(b2) the product obtained by treating an oxygenated Mg compound with an electron-donor compound.Also disclosed are catalysts prepared from said new catalyst-forming components, as is use of the catalysts in the polymerization of olefins, more particularly olefins CH.sub.2 .dbd.CHR in which R is an alkyl or aryl radical having 1-8 carbon atoms, of mixtures of said olefins and of mixtures thereof with ethylene.

Abstract: A component of a polymerization catalyst is prepared by reacting an organo-magnesium halide with a solid, inorganic oxide, then reacting the product with a Lewis Base compound, particularly an ester and finally with titanium tetrachloride. After reacting the organo-magnesium halide with the inorganic oxide it may be treated with a halogenating agent before it is reacted with the Lewis Base compound. The product obtained is combined with an organo-aluminium compound preferably together with a Lewis Base and used to polymerize an olefine monomer. The catalyst has a high activity, is stereospecific and has a lower proportion of halogen than some other catalyst systems.

Abstract: A titanium trichloride-catalyzed process for stereospecific polymerization of alpha-olefins, particularly propylene, to produce polymers of relatively high bulk density comprises employing as the TiCl.sub.3 catalyst component, used with an aluminum alkyl cocatalyst, a 0.1 to 30 millimicron fraction of a TiCl.sub.3 composition produced by(a) reacting TiCl.sub.4 with a complexing agent in a molar ratio of from 1:0.3 to 1:2;(b) reacting an organo-aluminum compound with a complexing agent in a molar ratio of at most 1:0.25;(c) reducing the complexed TiCl.sub.4 with the complexed organo-aluminum compound over a period of less than one hour at a temperature within the range 60.degree. to 110.degree. C. to produce TiCl.sub.3 particles having an average particle size of from 50 to 500 .mu.m;(d) subjecting the TiCl.sub.3 particles to a treatment to reduce the average particle size thereof to less than 50 .mu.m, and(e) classifying the TiCl.sub.

Abstract: Propylene is polymerized in the presence of a catalytic system of the type which comprises a solid titanium trichloride-based complex serving as a catalyst, said complex having an atomic ratio of aluminum to titanium in the range of below 0.15:1 and containing a complexing agent, and an organic aluminium compound of the general formula, AlR.sub.n.sup.1 Cl.sub.3-n wherein R.sup.1 represents an n-propyl group or an n-hexyl group and n is a value of 1.95-2.10. The catalytic system may further comprise an electron-donor compound as a third catalytic component.

Abstract: In an alpha-olefin polymerization process using a transition metal halide-aluminum alkyl catalyst system, addition of minor, effective amounts of alkyl orthoformates, thiophosphates and borates decreases the amount of low molecular weight or amorphous polymer produced.

Abstract: In an alpha-olefin polymerization process using a transition metal halide-aluminum alkyl catalyst system, addition of minor, effective amounts of a sterically hindered 5- or 6-membered cyclic ether decreases the amount of low molecular weight or amorphous polymer produced.

Abstract: Process for modifying a titanium trichloride-organoaluminum alpha-olefin polymerization catalyst to reduce production of alkane soluble products during polymerization of alpha-olefins in the presence of such catalyst without substantial decreases in catalyst activity, said process comprising combining in an inert diluent and in the substantial absence of catalyst poisons, components comprising an alkylaluminum component, a titanium trichloride, hydrogen sulfide or a bis-(trialkyltin)sulfide, a tertiary amine, and an aromatic dicarbonyl compound selected from the group consisting of dialdehydes and lower alkyl diesters of ortho-, para- and meta-phthalic acids. Polyalpha-olefins containing reduced levels of low molecular weight and amorphous components are produced by contacting the catalysts with at least one polymerizable alpha-olefin under polymerizing conditions.

Abstract: A component of a polymerization catalyst is prepared by reacting an organo-magnesium compound, or a complex with an organo-aluminium compound, with an halogenating agent such as silicon tetrachloride or hydrogen chloride, and then reacting the product with a Lewis Base compound, particularly an ester and finally with titanium tetrachloride. The product obtained is combined with an organo-aluminium compound preferably together with a Lewis Base and used to polymerize an olefine monomer. The catalyst has a high activity and is stereospecific.

Abstract: Titanium chloride catalysts having improved activity to polymerize propylene are prepared by treating TiCl.sub.4 with an aluminum alkyl and treating the resulting titanium chloride catalysts with carbon dioxide and a Lewis base such as di(n-butyl) ether at an elevated temperature.

Abstract: A titanium trihalide component of an olefine polymerization catalyst is prepared by reacting together a titanium tetrahalide and an organo-aluminium compound, and treating the solid reaction product with a hydrocarbon solution of an alkyl aluminium dihalide. It is preferred that the solid reaction product is treated with a complexing agent, particularly an ether such as di-isoamyl ether before contacting with the alkyl aluminium dihalide. The titanium trihalide can then be used together with an organo-metallic compound to polymerize an olefine monomer, particularly propylene. The catalyst system may include further components in addition to the titanium trihalide and organo-metallic compound.

Abstract: The process described herein comprises the polymerization of a conjugated diene, such as butadiene-1,2, isoprene, etc., in an anhydrous hydrocarbon solution and in intimate contact with a catalyst system comprising a cobalt or nickel component, a hydrocarbyl aluminum compound and a halogenated hydrocarbon, such as CCl.sub.4, CH.sub.2 Cl.sub.2, CBr.sub.4, CHCl.sub.3, CHBr.sub.3, etc., containing 1-10 carbon atoms and 1-6 halogen atoms per molecule, with at least one of said halogen atoms being attached to an aliphatic carbon atom. Analysis shows that the polymer product has cyclic structure and this is confirmed by the determination of residual unsaturation which is found generally to be less than 20 percent of the normal unsaturation of the polymeric diene. The products are useful in molding compositions.

Abstract: The catalyst system disclosed herein comprises a combination or a chelate of a hydrocarbyl lithium compound with a bicyclic amine compound bridged together through nitrogen in each cyclic ring by means of 1-4, preferably 2-4 carbon atoms and each cyclic ring having at least one nitrogen and at least one other heteroatom in its cyclic structure selected from the class consisting of NR, O, S and PR. This catalyst system is particularly useful in the polymerization of vinyl compounds such as ethylene, propylene, styrene, butadiene, etc. The process for the polymerization of conjugated dienes produces polymers of excellent properties. For example, with butadiene-1,3 and other appropriate conditions, polybutadiene with high percentages of syndiotactic crystalline structure may be produced.

Abstract: A catalyst according to the present invention for di-, oligo-, co- and poly- merization of vinyl monomers consists of an active phase comprising a compound of a transition metal of Groups IV-V of the periodic system deposited onto a polymeric carrier, viz, a macroporous copolymer of vinyl and divinyl monomers with a specific surface area of 30 to 700 m.sup.2 /g and a co-catalyst such as an organo-aluminum compound. The catalyst according to the present invention makes it possible to obtain dimers in high yields of more than 6,000 kg as calculated for 1 g of the transition metal for 2 hours and polymers in yields of up to 72 kg per 1 g of the transition metal. The catalyst according to the present invention makes it possible to control the particle size of the resulting (co) polymer which enables the use of the (co) polymer avoiding the stage of granulation.

Abstract: Magnesium metal is contacted with an organic halide in the absence of an ether or other complexing diluent to produce a magnesium reducing agent for converting titanium tetrahalide to titanium trihalide. In a first embodiment, the magnesium metal, organic halide, and titanium tetrahalide are introduced into a mill and milled. In a second embodiment, the organic halide is metered dropwise onto the magnesium metal in the absence of any extraneous diluent, and the resulting magnesium reducing agent is thereafter added to a titanium tetrahalide and milled. In a third embodiment, an organic halide containing the titanium tetrahalide is metered dropwise onto magnesium metal in the absence of any extraneous diluent. In each instance the resulting titanium trihalide catalyst component is contacted with an organoaluminum compound activator and used for the polymerization of olefins, preferably the polymerization of propylene.

Abstract: A solid catalyst component for forming, in combination with an organoaluminium compound, a catalyst for polymerization of .alpha.-olefins is provided, whereby .alpha.-olefin polymers having high stereoregularity or stereospecificity are produced in a high yield. The catalyst component is a product of contact of materials consisting essentially of a halogen-containing magnesium compound, a nucleus-substituted or unsubstituted benzoate ester and a titanium compound, and satisfies the conditions that the solid catalyst component contains 0.5 to 3.5% by weight of titanium atoms, and the highest absorption peak in the infrared absorption spectrum of the catalyst component among the absorption peaks appearing in the wave-number range of 1560 cm.sup.-1 to 1710 cm.sup.-1 appears in the wave-number region of 1665 cm.sup.-1 to 1710 cm.sup.-1.

Abstract: New catalyst components comprising compounds containing titanium, magnesium and halogens, and catalysts for polymerizing olefins obtained by mixing said components with organometallic Al compounds are disclosed.