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: Solid supported catalysts which can be employed for the polymerization of .alpha.-olefins are prepared by (A) reacting in the presence of a diluent such as n-hexane a mixture of (1) the reaction product of (a) an organo magnesium compound such as dibutyl magnesium and (b) at least one of water, carbon dioxide or an organic, oxygen-containing compound such as n-propyl alcohol; and (2) a transition metal halide such as titanium tetrachloride and (B) recovering the solid precipitate such as by decanting and (C) washing the solid with a solvent such as n-hexane. The resultant solid supported catalyst contains sufficient transition metal which when activated with a suitable activating agent serves as a polymerization catalyst for .alpha.-olefins. The polymers prepared employing these catalysts have a relatively narrow molecular weight distribution and low residual amounts of transition metal and halides.

Abstract: A solid catalyst for polymerization of olefins prepared by treatment of a titanium trichloride composition with a mixture of (1) a halogen, an interhalogen compound or a halogenated hydrocarbon compound, and (2) an ether which, in combination with organoaluminum compounds as activators, can be used to polymerize olefins for the efficient production of highly crystalline olefin polymers.

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: A supported titanium catalyst is produced by cogrinding, in combination, a magnesium halide, tetravalent titanium halide, organic acid ester, and an organic halogen compound. The resulting supported titanium catalyst, when employed as a titanium component with an organo aluminum catalyst component for the catalyst system in a process for stereoregular polymerization of .alpha.-olefins, produces high polymerization activity and unexpectedly high stereoregular polymer yielding ratios.

Abstract: A supported titanium catalyst, adaptable for use in the stereoregular polymerization of .alpha.-olefins, is produced by treating a supported titanium-containing solid, obtained by cogrinding a magnesium halide, tetravalent titanium halide and organic acid ester, with a hydrocarbon, organo halogen compound or mixture thereof with heating. The resulting supported titanium catalyst, when employed as a titanium component with an organo aluminum catalyst component for the catalyst system in a process for stereoregular polymerization of .alpha.-olefins, produces high polymerization activity and unexpectedly high stereoregular polymer yielding ratios.

Abstract: A titanium trichloride catalytic complex is produced by reducing titanium tetrachloride with an alkylaluminum halide composition at low temperature and then treating the resulting reduced solids product by contacting it at elevated temperature with a dialkyl ether having alkyl groups of 4 to 5 carbon atoms and with hexachloroethane, the proportion of dialkyl ether being at least 1 mol per 1 mol of hexachloroethane and the proportion of hexachloroethane being at least greater than about 0.5 mol per 1 gram atom of titanium in the reduced solids product. The resulting titanium trichloride complex composition, when employed as 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: Curable organic resin compositions, such as epoxy resins, are provided, based on the use of dialkyl hydroxy arylsulfonium salts in combination with certain organic oxidants such as iodosoaromatic esters, or the use of certain amines or transition metals in combination with organic peroxides. The curable compositions can provide flexible or rigid organic resin foam when used with a volatile organic solvent as a result of exothermic heat of cure.

Abstract: There is disclosed a process for the preparation of gel-free rubbery copolymers of cyclopentene and dicyclopentadiene by means of a catalyst system comprising (A) a soluble tungsten halide or oxyhalide, (B) an organoaluminum compound, (C) an alcohol and (D) a polyhalogenated phenol.

Abstract: .alpha.-Olefin polymers of high stereoregularity are prepared by polymerizing the .alpha.-olefin with a catalyst 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: Polymerization performance of organoaluminum reduced, electron donor complexed, brown solid, beta titanium trichloride catalyst component is improved in terms of polymer particle size by contacting said brown solid with at least one aluminum alkyl and at least one alpha-olefin in amounts and under conditions such that a low yield, polyalphaolefin structure is formed around the brown solid.

Abstract: A titanium trichloride catalytic component suitable for preparing highly stereospecific polymers having highly uniform particle diameters from .alpha.-olefins is prepared by precipitating such catalytic component from a solution of TiCl.sub.4 in a solvent comprising a saturated aliphatic hydrocarbon and/or an alicyclic hydrocarbon. Such solution is obtained by dissolving TiCl.sub.4, an ether and an organo-aluminum compound having the formula AlR.sub.n X.sub.3-n (wherein R, X and n are as defined hereinafter) in the solvent. The organo-aluminum compound is added at a solvent temperature not exceeding 55.degree. C. in the concomitant presence of an aromatic hydrocarbon halide; subsequently, the temperature of the resulting system is raised to 45.degree.-150.degree. C. over a period of 10 minutes to 24 hours to precipitate the catalytic component which has a uniform particle diameter between 10 and 1000.mu..Homo- or co-polymerization of .alpha.

Abstract: A process for producing a polymer or copolymer of an olefin containing at least 3 carbon atoms which comprises polymerizing or copolymerizing at least one olefin containing at least 3 carbon atoms, or copolymerizing the olefin with up to 10% mole of ethylene and/or a diolefin, in the presence of a catalyst composed of (A) a magnesium-containing solid titanium composition and (B) an organometallic compound of a metal of Groups I to III of the periodic table; characterized in that the solid titanium composition (A) is a composition formed by contacting (i) a halogen-containing magnesium organo-aromatic compound of the formula Mg(OR).sub.n X.sub.2-n wherein R represents an aryl or aralkyl group and n is a positive number of 0<n<2, (ii) an organic acid ester, and (iii) a titanium compound in the absence of mechanical pulverization.

Abstract: In a process for preparing polyolefin by polymerizing an olefin in the presence of a catalyst system combining an organoaluminum compound and a titanium-containing solid catalytic component prepared by mixing (a) water and/or a hydroxy compound, (b) a Grignard reagent and (c) a titanium tetrahalide, the components (a) (b) or (c) or the reaction mixture of two or three components thereof is contacted with (d) one or more electron donor selected from the group consisting of amines, carboxylic acid amides, phosphines, phosphine oxides, phosphoric esters, phosphorous esters, phosphoric acid amides, ketones and carboxylic esters. The polyolefin having high isotactic index can be obtained.

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 aluminum 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 new catalyst system for alphaolefin type polymerizations, includes at least one hindered alkyl metal amide compound having the formula R'.sub.2 YNR.sub.2 in combination with a Group IVB-VIII transition metal compound on a support and at least one Lewis base wherein R is selected from the group consisting of C.sub.4 to C.sub.20 bulky alkyl, cycloalkyl, aralkyl, aryl and substituted aryl groups or R.sub.2 N is a hindered cyclic amide group; R' is selected from the group consisting of C.sub.1 to C.sub.20 primary alkyl, secondary alkyl, tertiary alkyl, neopentyl alkyl, branched alkyl, cycloalkyl or aralkyl groups, and Y is selected from the group consisting of aluminum, gallium or indium. The catalyst system provides polymers having increased isotactic stereoregularity as well as lower catalyst residue.

Abstract: A new improved Ziegler type catalyst system for alpha-olefin type polymerization includes R'.sub.3 Y or R'.sub.2 YX and mixtures thereof, at least one Group IVB -VIII transition metal halide and an alkyl metal compound selected from R'.sub.2 YNR.sub.2 and R'XYNR.sub.2, wherein Y is Al, Ga or In and at least one Lewis base. The improved catalyst system provides increased polymerization activity without significantly affecting the crystallinity of the polymer.

Abstract: A process for the polymerization of olefins in the presence of a catalyst comprising a titanium compound and/or vanadium compound supported on a solid carrier and an organoaluminum compound, characterized in that said solid carrier comprises a solid product obtained by the reaction of an organomagnesium compound or a reaction mixture resulting from the organomagnesium compound and at least one compound selected from the group consisting of magnesium hydroxide, calcium hydroxide, zinc hydroxide and aluminum hydroxide, with an aluminum halogenide and/or silicon halogenide, whereby there are produced olefine polymers in an extremely large amount per unit weight of catalyst.

Abstract: A process is described herein for improving the crystalline olefin polymerization yield and soluble polymer production of a high surface area, large porosity, brown catalyst component comprising beta titanium trichloride and some of at least one organic electron pair donor compound, which component is prepared by organoaluminum compound reduction of titanium tetrachloride followed by incorporation of the reduced solid with said donor compound and thereafter treatment with an electron pair acceptor compound. The improved process employs in the reduction a dialkylaluminum compound and a second material, which second material is subsequently substantially extracted prior to use of said component for polymerization.

Abstract: A titanium trichloride catalytic component manufactured by pulverizing an eutectic mixture or a crystalline compound consisting of titanium trichloride and aluminum chloride or a pulverized matter thereof together with an organic acid or an acid anhydride thereof at a temperature between 35.degree. and 100.degree. C. in the absence of an inert solvent and without any extractive process carried out with such an inert solvent; and a method for carrying out homo-polymerization or co-polymerization of .alpha.-olefin by using a catalyst system consisting of the above mentioned titanium trichloride catalytic component and an organoaluminum compound.

Abstract: Stereospecific polymerization of .alpha.-olefins is carried out with use of a catalyst comprising an activated titanium component obtained by treating products of copulverization of magnesium halides and aromatic orthocarboxylic acid esters with titanium halides, an organoaluminum compound and an electron donative compound. .alpha.-Olefin polymers of high stereospecificity are thus obtained with a high polymerization activity.

Abstract: A solid catalyst for olefin polymerization which is obtained by the catalytic treatment of a titanium trichloride composition with a mixture of a halogenated hydrocarbon and an ether, the composition being produced by subjecting a solid reduction product, which is obtained by reduction of titanium tetrachloride with an organo-aluminum compound, to heat treatment or to catalytic treatment with a specific organo-aluminum compound, aluminum halide, an ether and the like. In the polymerization of an olefin, combined catalyst systems of this solid catalyst and organo-aluminum compounds as activators can be used for efficient production of olefin polymers having a high crystallinity.

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 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 an organic sulphur-containing compound; 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 E, and preferably L and washing the product. In the composition, E is conveniently di-n-butyl ether or di-isoamyl ether and L can be phenoxathiin or diphenyl sulphone. 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 soft copolymers which comprises copolymerizing ethylene and butene-1 in the presence of a catalyst comprising (1) a reaction product of (A) an organic titanium compound of the formula,Ti(OR).sub.n X.sub.4-nwherein R is a hydrocarbon residue having 1 to 10 carbon atoms, X is a halogen atom and n is a number satisfying the equation 0<n.ltoreq.4, and (B) an organo-magnesium compound, and (2) an organo-aluminum compound of the formula,AlR.sub.m 'X'.sub.3-mwherein R' is a hydrocarbon residue having 1 to 20 carbon atoms, X' is a halogen atom and m is a number satisfying the equation 0<m.ltoreq.3, the content of butene-1 in the copolymers being 10 to 30 mole %.

Abstract: An improved titanium trichloride catalyst component is prepared by treating a crude titanium trichloride composition with two different electron donor compounds via successive treatment with first one of the donor compounds and then with the other. The treated composition provides greater stereospecificity in the polymerization and copolymerization of propylene.

Abstract: Process for the polymerization of .alpha.-olefins in the presence of an activator selected from among the organic compounds of metals of groups Ia, IIa, IIb and IIIa of the Periodic Table and a solid catalytic element prepared by(a) reducing TiCl.sub.4 by means of a reducing metal selected from among the metals of groups Ia, IIa, IIb, IIIa of the Periodic Table so as to prepare a double chloride of titanium and the reducing metal(b) treating the double chloride thus prepared by means of a complexant(c) reacting the double chloride thus treated with TiCl.sub.4(d) separating the solid catalytic element thus prepared.

Abstract: Solid catalytic complexes are useful for stereospecific polymerization of .alpha.-olefins to solid crystalline polymers. The complexes are formed by reducing TiCl.sub.4 with an alkylaluminum, treating thus-obtained reduced solid with a complexing agent and contacting the resultant with TiCl.sub.4. They have a specific surface greater than 75 m.sup.2 /g.

Abstract: Storage stability of Ziegler-type catalysts for .alpha.-olefin polymerization and having a specific surface greater than 75 m.sup.2 /g is improved by treating the catalysts with a preactivator which is an organic compound of a metal of one of Groups Ia, IIa, IIb and IIIa of the Periodic Table.CROSS-REFERENCE TO RELATED APPLICATIONThe invention described herein is directly related to that described in copending Application Ser. No. 236,407, filed Mar. 21st, 1972. The entire text of that application is incorporated herein by reference.BACKGROUND OF THE INVENTIONZiegler-type microporous catalytic complexes having a specific surface area greater than 75 m.sup.2 /g and useful for the polymerization of .alpha.-olefins are prepared by (a) reducing TiCl.sub.4 by means of an aluminum alkyl; (a') optionally isolating the reduced solid, based on TiCl.sub.

Abstract: Particles of titanium trichlorides usable for the stereospecific polymerization of alpha-olefines, especially propylene, having been dried until their liquid content is less than 1% by weight relative to the weight of titanium trichloride present in said particles, as well as a process for the preparation of such particles and a process for stereospecific polymerization in the presence thereof.

Abstract: Novel TiCl.sub.3 catalytic complexes for the stereospecific polymerization of alpha-olefins and to a process for preparation of these catalytic complexes which are obtained by reduction of TiCl.sub.4 in the presence of a Lewis base which has preferably been complexed with the reducing agent. Furthermore, the present invention relates to a process for improved polymerization of alpha-olefins to crystalline polyolefins in high yields and high stereospecificity using these catalytic complexes.

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 the preparation of polyolefins, polymerizing olefins with use of a solid catalyst separated from a reaction mixture which is obtained by reducing a halogen-containing compound of vanadium with an organic aluminum compound in the presence of an ether and an organic aluminum compound.

Abstract: A process is described for polymerizing acetylene to selectively produce partially crystalline polyacetylene in its cis and trans configurations, which when doped with halogen additives, are useful as electrical conductors or semi-conductors. The polymerization is conducted in a solution containing a lithium dicyclopentadienyl titanium hydride catalyst in a liquid organic solvent therefor, at a temperature in the range of about -120.degree. to +250.degree. C. Lower process temperatures, such as below -60.degree. C., favor the formation of the cis form, and higher temperatures, above 0.degree. C., favor the formation of the trans form.

Abstract: A process is provided for the polymerization of an olefin such as ethylene in the vapor phase in a moving bed of particles of the polymerized olefin in which novel means are employed to feed the finely-divided solid polymerization catalyst to the polymerization zone. The process is carried out by pumping into the polymerization zone a Bingham fluid which has the finely-divided solid polymerization catalyst uniformly dispersed throughout a solid continuous phase, which is a mixture of a wax and a hydrocarbon which is a liquid at ambient temperature.

Abstract: A solid titanium trichloride, produced by precipitation from a homogeneous solution or mixture with an ether, is treated by prepolymerization with propylene at a partial pressure of less than 1 kg/cm.sup.2. The pretreated titanium trichloride containing a propylene polymer is then admixed with an organoaluminum compound and the admixture is used as a catalyst in the polymerization of propylene.

Abstract: A process for producing titanium-trichloride based catalyst comprising reducing titanium tetrachloride in excess with an organo-aluminum compound in the presence of 2 to 5 mols per mol of organo-aluminum of one or more aliphatic ethers having the formula R'--O--R" in which R' and R" are alkyl groups containing 1 to 5 carbon atoms and maturing the formed precipitate at a temperature within the range of 80.degree.-115.degree. C., said catalyst being useful with an organo-metallic co-catalyst in the polymerization of olefins.

Abstract: A process for preparing a modified titanium chloride component for a titanium-containing Ziegler olefin polymerization catalyst comprising (1) treating an ether-free organo-magnesium compound with an oxygen-containing organic compound other than an ether, or with carbon dioxide or oxygen under anhydrous conditions and (2) reacting the product with titanium tetrachloride.

Abstract: A transition metal product, for example a titanium trichloride material, is obtained by milling a solid transition metal compound with a carboxylic acid or an ester thereof, for example methylmethacrylate and contacting with an organo-Lewis Base such as an amine, an organo-phosphorus compound or a sulphone derivative. The organo-Lewis Base may be milled with the transition metal compound or may be added to the transition metal compound as a solution in an inert liquid. The product can be used as a component of an olefine polymerization catalyst.

Abstract: A process for the preparation of an active TiCl.sub.3 catalyst which comprises:(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.3 particles to separate a fraction having an average particle size of from 0.1 to 30 .mu.m.

Abstract: A process for the preparation of catalysts for the polymerization of olefines, e.g. ethylene and propylene. This process comprises essentially the two following steps:(1) A compound (A) of an element selected from groups Ia, Ib, IIa, IIb, IIIa, IIIb, VIa and VIIb of the Periodic Table of Elements is heated and milled under the protection of an inert gas with an organic acetoxy compound; then the volatile portions of the mixture are eliminated by distillation.(2) The solid resulting from the first step is dissolved or dispersed in a non-polar hydrocarbon and an activator (B) is added, mixed and heated with said solution or dispersion until a homogeneous solution or dispersion of activated catalyst is obtained. (B) is selected from compounds of elements IVa, IVb and Vb of the Periodic Table.This catalyst is used in admixture with a polymerization promoter (C) selected from organo-metallic additives, e.g. aluminum-organic compounds for the polymerization of olefines at relatively low temperatures and pressures.

Abstract: A method is disclosed for preparing a catalyst system for polymerizing .alpha.-olefins. This method comprises admixing with at least an organoaluminum compound an activated titanium component which is prepared by first reacting a titanium compound of the general formula, TiX.sub.n (OR).sub.4-n (in which X is a halogen atom, R is an alkyl group or a phenyl group, and n is 2 to 4), with a metal of Group II or III of the Periodic Table and a halide of a metal of Group II or III of the Periodic Table in the presence of an aromatic compound, then treating the resulting reaction product with an oxygen-containing organic compound, and further treating with a tetrahalide of titanium, vanadium or both at a temperature of from -80.degree. C. to 80.degree. C., and finally aging at a temperature above 30.degree. C. for from 30 minutes to 24 hours.

Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins, particularly higher olefins, are provided by reacting a trivalent titanium halide complex such as an alcohol complex of titanium trichloride, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum and halide source such as a hydrogen halide or an alkyl aluminum halide. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics.

Abstract: A process for the manufacture of homopolymers and copolymers of .alpha.-monoolefins by polymerizing the monomer or monomers by means of a Ziegler-Natta catalyst comprising (I) a titanium trichloride component and (II) an aluminum-alkyl component, wherein the titanium trichloride component (I) employed is obtained by (1) in a first stage moistening a suitable conventional catalyst component, consisting entirely or substantially of titanium trichloride, with a hydrocarbon mixture comprising a liquid alkane hydrocarbon and a liquid benzene hydrocarbon and (2) in a second stage drying the catalyst component, moistened with the hydrocarbon mixture, under an inert gas, with constant mechanical mixing, within a certain period, at a temperature which is from 5.degree. to 50.degree. C. above the boiling point of the highest-boiling hydrocarbon present in the hydrocarbon mixture which has been used to moisten the component.

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: A method for preparing a solid catalyst comprising reacting a titanium trichloride composition with a mixture of(1) an ether compound and carbon atom and represented by the general formula (IV): ##STR1## wherein R.sup.5, R.sup.6 and R.sup.7, which may be the same or different, each has up to 18 carbon atoms and represents an aliphatic hydrocarbon group, which may be straight chain, branched chain or cyclic, or an aromatic hydrocarbon group, with at least one of R.sup.5, R.sup.6 and R.sup.7 being an aromatic hydrocarbon group, with at least one of R.sup.5, R.sup.6 and R.sup.7 being an aromatic hydrocarbon group, the amount of the hydrocarbon compound being about 0.01 to about 10 moles per mole of titanium trichloride in the titanium trichloride composition; and/or(2) (b) an organic sulfur compound represented by the general formulas (VI) and (VIII):R.sup.9 --S--S--R.sup.10 (V)HS--(CH.sub.2).sub.d --SH (VI)wherein each of R.sup.9 and R.sup.

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 aliphatic hydrocarbon having three to eight 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: A process is provided for the stereospecific polymerization of an olefin such as ethylene in a liquid medium in which a finely-divided solid polymerization catalyst is fed to the polymerization zone on a truly continuous basis to provide a uniform dispersion of the polymerization catalyst throughout the polymerization zone. The process is carried out by pumping into the polymerization zone a Bingham fluid which has the finely-divided solid polymerization catalyst uniformly dispersed throughout a solid continuous phase, which is a mixture of a wax and a liquid hydrocarbon.

Abstract: In a process for producing a propylene homopolymer or copolymer which comprises polymerizing propylene or copolymerizing propylene and at least one other unsaturated hydrocarbon monomer in liquid propylene using a catalyst comprising activated titanium trichloride and an organo-aluminum compound, the activated titanium trichloride being prepared by reducing titanium tetrachloride with an organo-aluminum compound followed by activation, introducing the polymer slurry produced into the top of a counter-current washing tower, and washing the slurry by bringing the slurry into counter-current contact with liquid propylene which is introduced into the bottom of the washing tower, the improvement which comprises refining the homopolymer or copolymer of propylene by feeding (a) an alcohol having 3 to 8 carbon atoms in a molar amount of about 0.

Abstract: A catalyst for the (co)polymerization of ethylene, .alpha.-olefines, conjugated and non-conjugated dienes, a method of preparation, and a mode of using same. The catalyst contains from 0.1 to 50 wt.% of a compound of a transition metal of the IV-VIII Groups chemically combined and distributed over the surface and within the volume of a rubber-like polymeric carrier containing from 1 to 50 wt.% of electron-donor and/or electron-acceptor groups and is in the form of a gel which is swellable, but insoluble in the reaction medium.A co-catalyst comprising an organic compound of a metal of Groups I-III is employed chemically combined and/or non-combined with the catalyst.The catalyst is prepared by mixing the metal compound with said carrier swollen or dissolved in a solvent, and by extracting the resulting compound with a solvent.(Co)polymerization is effected in a solvent such as a hydrocarbon or a hologenated hydrocarbon derivative at a temperature not exceeding 200.degree. C.