Abstract: A catalyst component for polymerization catalyst of .alpha.-olefines, the polymerization catalyst comprising an organoaluminum compound, an electron donor, as well as the solid catalyst component which is obtained when a compound containing magnesium reacts with a titanium halogen compound. A method for producing the catalyst component is also provided. The catalyst component is manufactured by reacting with a titanium halogen compound in the presence of an internal electron donor, a solid catalyst component which has been produced by the steps of(a) reacting a magnesium alkyl compound with a chlorinating compound,(b) dissolving the chlorinated magnesium alkyl compound in alcohol, after possible washing,(c) adding into the solution, magnesium silicate which has not been calcinated,(d) adding the mixture obtained in step (c) into a cold medium, to precipitate the magnesium compound into and onto the magnesium silicate carrier, and(e) separating the thus-obtained solid carrier component.

Abstract: A first reactant selected from arylsilanol, hydrocarbyl amine, hydrocarbylphosphine oxide, and hydrocarbyloxyphosphite is combined with a second reactant selected from halogenated transition metal compound and an organometal compound to form a product which is catalytically active for olefin polymerization after optionally first having been deposited on a particulate diluent.

Abstract: Solid catalyst components for use in the polymerization of olefins and having improved activity and selectivity are prepared by:(a) halogenating a magnesium compound containing at least one aryloxy, alkyl carbonate or alkyloxy group with a first halide of tetravalent titanium and a first electron donor;(b.sub.1) contacting the resulting halogenated product with a second halide of tetravalent titanium; and(c) washing a resulting treated halogenated product with an inert hydrocarbon liquid, wherein a second electron donor is used in step (a) or step (b.sub.1) and in that the product of step (b.sub.1) is contacted in a step b.sub.2 with a third halide of tetravalent titanium at a temperature of 40.degree. to 140.degree. C. and thereafter the treated product is washed in step (c).

Abstract: There is disclosed a catalyst composition for the polymerization of olefins, particularly alpha-olefins. The composition is prepared by synthesizing a catalyst precursor and then combining it with a conventional catalyst activator. The precursor is synthesized by: (a) contacting a solid, porous carrier with an aluminum compound; (b) contacting the resulting product with a mixture of vanadium and titanium compounds; and, (c) contacting the product with an ether.The catalyst composition is used with a conventional activator and, preferably, a halogenating agent in the polymerization medium to produce broad molecular weight distribution, high molecular weight HDPE or medium density, broad molecular weight distribution, high molecular weight resins which can be made into high strength films.

Abstract: A catalyst for olefin polymerization which comprises:Component (A) which is a solid catalyst component obtained by contacting the following components (i) to (iv):(i) a solid component comprising titanium, magnesium and halogen as essential elements,(ii) a silicon compound represented by the formula (I):R.sup.1.sub.m X.sub.n Si(OR.sup.2).sub.4-m-n (I)wherein R.sup.1 and R.sup.2 each represent a hydrocarbon residue, X represents a halogen, and each of m and n is an integer in the range of 0.ltoreq.m.ltoreq.3, 0.ltoreq.n.ltoreq.3, and 0.ltoreq.m+n.ltoreq.3,(iii) a titanium compound or a silicon compound represented by the formula (II) or (III):Ti(OR.sup.3).sub.4-l X.sub.l (II)R.sup.4.sub.4-l SiX.sub.l (III)wherein R.sup.3 represents a hydrocarbon residue, R.sup.4 represents hydrogen or a hydrocarbon residue, X represents a halogen, and l is an integer in the range of 0<l.ltoreq.4, and(iv) an organoaluminum compound; andComponent (B) which is an organoaluminum compound.

Abstract: Catalysts for the polymerization of alpha-olefins, which comprise the product of the reaction between:(a) a metallorganic compound of Al;(b) an electron-donor compound reactive towards MgCl.sub.2 but which is not completely complexed with AlEt.sub.3, at the equivalent point of a potentiometric titration under standard conditions;(c) a solid comprising a halogenated Ti compound and an electron-donor belonging to particular classes of compounds and being extractable with AlEt.sub.3 for at least 70% by mols from the solid, the surface area of which after extraction is higher than 20 m.sup.2 /g.The present invention refers to new supported components of catalysts for the polymerization of olefins CH.sub.2 .dbd.CHR, in which R is an alkyl with 1-4 carbon atoms or an aryl, and of mixtures of such olefins with each other and/or with ethylene, and to the catalysts obtained from such components.

Abstract: A method for producing an olefin polymer, which comprises polymerizing or copolymerizing olefins in the presence of a catalyst comprising:(A) a solid catalyst component obtained by thermally reacting (a.sub.1) a magnesium compound of the formula Mg(OR.sup.1).sub.n (OR.sup.2).sub.2-n wherein each of R.sup.1 and R.sup.2 which may be the same or different is an alkyl group, an aryl group or an aralkyl group, and n is 2.gtoreq.n.gtoreq.0, (a.sub.2) a titanium compound of the formula Ti(OR.sup.3).sub.4 wherein R.sup.3 is an alkyl group, an aryl group or an aralkyl group and (a.sub.3) a silicon compound of the formula Si(OR.sup.4).sub.4 wherein R.sup.4 is an alkyl group, an aryl group or an aralkyl group and contacting and treating (a) the resulting thermal reaction product with (b) a halogen-containing titanium compound and (c) an electron donative compound, and(B) an organometallic compound of a metal of Groups I-III of the Periodic Table.

Abstract: A transition metal composition is obtained by reacting the magnesium salt of a cycloalkyl carboxylic acid with a transition metal compound, and optionally a Lewis Base compound. The product may be used to produce an olefin polymerization catalyst by addition of for example an aluminium trialkyl and the resulting catalyst has a high activity and stereospecificity in an olefin polymerization process.

Abstract: A vanadium catalyst composition comprising:(i) the reaction product of a vanadium compound and an electron donor, which is a liquid, organic Lewis base in which the vanadium compound is soluble;(ii) a hydrocarbyl aluminum cocatalyst; and(iii) a promoter having the following formula:C.sub.3 (X).sub.a (F).sub.b (H).sub.

Abstract: Catalysts for the preparation of copolymers of ethylene and/or alpha-olefins and optionally dienes, are obtained by reacting an Al-alkyl with a solid catalytic component comprising:(A) a magnesium compound containing at least an Mg-halogen bond;(B) a halogenated compound of at least partly trivalent Ti or V, containing at least a Ti-OR or V-OR bond, wherein the Mg/Ti(V), halogen/Ti(V), halogen/Mg and OR/Ti(V) atomic ratios are within determined ranges; and(C) an electron-donor compound.Elastomeric copolymers endowed with improved tension set values are obtained with said catalysts.

Abstract: A method for producing an olefin polymer, which comprises polymerizing or copolymerizing an olefin in the presence of a catalyst comprising (a) a titanium-containing solid catalyst component and (b) an organic metal compound of a metal of Groups I-III of the Periodic Table, said solid catalyst component (a) being obtained by treating (A) a magnesium compound of the formula Mg(OR.sup.1).sub.n (OR.sup.2).sub.2-n wherein each of R.sup.1 and R.sup.2 is an alkyl group, an aryl group or an aralkyl group, and n is 2.gtoreq.n.gtoreq.0, with three compounds i.e. (B) an electron donative compound, (C) a silicon compound of the formula Si(OR.sup.3).sub.4 wherein R.sup.3 is an alkyl group, an aryl group or an aralkyl group and (D) a titanium compound.

Abstract: A process is disclosed for improving the morphology of a polymerization catalyst formed from a magnesium alkoxide with bound alcohol. The process comprises treating the magnesium alkoxide with an unreactive solvent at or above the temperature at which the alcohol dissociates from the alkoxide prior to subjecting the magnesium alkoxide to metathesis.

Abstract: A process is disclosed for improving the productivity of a polymerization catalyst formed from a magnesium alkoxide which normally undergoes poor metathesis towards production of magnesium chloride. The process comprises treating the magnesium alkoxide with a silane alkoxide at or above the temperature at which the alcohol which is formed dissociates from the alkoxide prior to subjecting the magnesium alkoxide to metathesis.

Abstract: A solid catalyst component which is prepared by:mixing an alkyl or aryl magnesium compound with a branched or aromatic aldehyde in the presence of a solvent;adding a tetravalent titanium halide to the solution;recovering the resulting precipitate; andcontacting the precipitate with a tetravalent titanium halide.

Abstract: A process for polymerizing alpha olefins with a polymerization catalyst containing a solid catalyst component which is prepared by mixing two or more alkyl or aryl magnesium compounds with an aldehyde or a ketone in the presence of a solvent, adding a tetravalent titanium halide to the solution, recovering the resulting precipitate, and contacting the precipitate with a tetravalent titanium halide.

Abstract: A solid hydrocarbon-insoluble, alpha-olefin polymerization catalyst component with superior activity, stereospecificity and morphology characteristics comprises the product formed by (A) forming a solution of a magnesium-containing species from a magnesium carbonate or a magnesium carboxylate; (B) precipitating solid particles from such magnesium-containing solution by treatment with a transition metal halide and an organosilane; (C) reprecipitating such solid particles from a mixture containing a cyclic ether; and (D) treating the reprecipitated particles with a transition metal compound and an electron donor.

Abstract: MgO treated with an organic acid, e.g., 2-ethyoxybenzoic acid, is used as a support for an Al-Ti Ziegler catalyst in which the Ti component is the product of an alkanol having 5 to 12 carbon atoms and TiCl.sub.4 to give HDPE with narrow MWD and large particle size for injection molding.

Abstract: Polymers of propene are prepared using a Ziegler-Natta catalyst system consisting of (1) a titanium component which is based on a finely divided, shape-imparting silica gel and contains titanium, magnesium, chlorine and a benzenecarboxylic acid derivative, (2) an aluminum component and (3) a silane component. In the process, a titanium component (1) is employed which is obtained by (1.1) first preparing (I) a carrier from (Ia) a silica gel which has a relatively high moisture content, (Ib) an organomagnesium compound and (Ic) a gaseous chlorinating agent by a method in which (1.1.1) first (Ia) is reacted with (Ib), (1.1.2) then (Ic) is passed into the mixture obtained in (1.1.1), and (I) is isolated, (1.2) thereafter a solid-phase intermediate is prepared from (I), (II) an alkanol, (III) titanium tetrachloride and (IV) a phthalic acid derivative by a procedure in which (1.2.1) first (I) is reacted with (II), (1.2.2) then (III) is introduced into the mixture resulting from (1.2.

Abstract: A catalyst and its use in polymerizing olefins, wherein the catalyst is prepared by contacting a support with a compound of titanium and/or vanadium.

Abstract: Solid components of catalysts for the (co)polymerization of ethylene, or precursors of such components are prepared by treating an (a) emulsion in a perfluoropolyether of a liquid compound of magnesium, of titanium or of another transition metal, or of solutions thereof, possibly using an electron-donor compound, with (b) a reducing and/or halogenating agent capable of forming an insoluble solid product, after which, if such a product is a precursor of the catalytic component, it is treated with a tetravalent-titanium halide, or with a halide of another transition metal.

Abstract: A catalyst for polymerization of olefins is disclosed which comprises a titanium and/or vanadium compound supported on a silicon and/or aluminum oxide carrier. This carrier has peculiar characteristics including a specified proportion of highly spherical oxide particles, a selected average pore size and a specified proportion of a selected particle size range before and after ultrasonic treatment, whereby there is obtained a catalyst having increased bulk density, narrow particle size distribution and high fluidity.

Abstract: A vanadium-based catalyst is treated with certain oxygen-containing compounds as a means of narrowing and effectively regulating the molecular weight distribution of the polymers produced with the catalyst.

Abstract: A catalyst component is in the form of a granular spherical solid with at least 80% of the granules between 30 and 40 microns in size, a service area of 15 to 30 m.sup.2 /g and a porosity of 40 to 80 volumes % and definable (in atomic proportions) by the formula: ##STR1## where Et denotes the ethyl group; OEt denotes the ethoxy group and OR' is an alkoxy group containing from 1 to 8 carbon atoms in the alkyl portion, and in which the ratio of trivalent titanium to the sum of trivalent and tetravelent titanium is in the range from 0.8/1 to 1/1.

Abstract: The invention concerns a procedure for manufacturing solid catalyst components for catalysts serving polymerization of alpha-olefines, having a solid carrier substance containing an organic or inorganic magnesium compound and treated with a titanium halide and optionally with an electron donor compound. The magnesium compound or the mixture of magnesium compound and electron donor compounds is sprayed in molten state into a chamber or volume which has been cooled to a temperature at which the catalyst component will solidify from the melt in the form of particles with generally spherical shape, without any substantial evaporation of solvents.

Abstract: An olefin polymerization catalyst system comprises a solid, hydrocarbon-insoluble, magnesium-containing, titanium-containing, electron donor-containing component; an alkyl aluminum compound; and organosilane compound selected from the group consisting of diisobutyldimethoxysilane, diisopropyldimethoxysilane, t-butyltrimethoxysilane and di-t-butyldimethoxysilane, and mixtures thereof.

Abstract: A catalyst for the polymerization of olefins which exhibits a high catalytic activity and is capable of producing a stereoregular polymer in a high yield. The catalyst includes a catalyst component for the polymerization of olefins prepared by subjecting a solid composition obtained by a process comprising contacting dialkoxymagnesium, diester of aromatic dicarboxylic acid, aromatic hydrocarbon and titanium halide to a heat treatment in the presence or absence of a solvent; a silicon compound; and an organic aluminum compound.

Abstract: A catalyst component for polymerization of olefin, comprising a contact product of a component (A) which is a solid component containing titanium having at least one OR.sup.1 group (where R.sup.1 represents a hydrocarbon residue) and magnesium and a halogen as the essential components; a component (B) which is an acid halide compound; a component (C) which is a compound having an OR.sup.2 group (where R.sup.2 represents a hydrocarbon residue or hydrogen atom); and a component (D) which is a halide compound of silicon. When an olefin is polymerized by use of this as the transition metal component of a Ziegler type catalyst, an olefin polymer with high activity and high I.I and excellent polymer properties can be obtained.

Abstract: A solid catalyst component prepared by washing a solid substance, which has been obtained by reacting diethoxymagnesium (a) suspended in an alkylbenzene (b) with titanium tetrachloride (c) in an amount less than 1/2 of the alkylbenzene (b) in a ratio by volume and a phthalic diester (d) at a temperature within the range of 80.degree.-135.degree. C., with an alkylbenzene, and thereafter reacting the solid substance in a presence of an alkylbenzene (b) with titanium tetrachloride (c) in an amount less than 1/2 of the alkylbenzene (b) in a ratio by volume as well as an olefin polymerization catalyst comprising (A) the solid catalyst component specified above, (B) a silicon compound of the general formula:SiR.sub.m (OAlk).sub.

Abstract: A method for the production of a catalyst component for use in the polymerization of an olefin, which method comprises causing a magnesium-containing solid obtained by contact of (A) magnesium metal, (B) a halogenated hydrocarbon represented by the general formula, RX, wherein R stands for an alkyl, aryl, or cycloalkyl group having 1 to 20 carbon atoms and X for a halogen atom, and (C) a compound of the general formula, X.sub.n.sup.1 M(OR.sup.1).sub.m-n, wherein X.sup.1 stands for a hydrogen atom, a halogen atom, or a hydrocarbon group having 1 to 20 carbon atoms, M for a boron, carbon, silicon, aluminum, or phosphorus atom, R.sup.1 for a hydrocarbon group having 1 to 20 carbon atoms, and m for the valency of said atom M, providing that m>n.gtoreq.0 is satisfied, to contact (D) a halogen-containing alcohol and then contact (E) a titanium compound.

Abstract: A method for the production of a catalyst carrier for use in the polymerization of an olefin, which method comprises causing a magnesium-containing solid obtained by contact of (A) magnesium metal, (B) a halogenated hydrocarbon represented by the general formula, RX wherein R stands for an alkyl, aryl, or cycloalkyl group having 1 to 20 carbon atoms and X for a halogen atom, and (C) a compound of the general formula, X.sub.n.sup.1 M(OR.sup.1).sub.m-n wherein X.sup.1 stands for a hydrogen atom, a halogen atom, or a hydrocarbon group having 1 to 20 carbon atoms, M for a boron, carbon, silicon, aluminum, or phosphorus atom, R.sup.1 for a hydrocarbon group having 1 to 20 carbon atoms, and m for the valency of said atom M, providing that m>n.gtoreq.0 is satisfied, to contact (D) a halogen-containing alcohol.

Abstract: A catalyst for olefin polymerization which comprises a combination of:Component which is a solid catalyst component A obtained by contacting a component (i) which is a solid component comprising titanium, magnesium and halogen as essential elements with a component (ii), which is a silicon compound represented by formula: R.sup.1 R.sup.2.sub.3-n Si(OR.sup.3).sub.n where R.sup.1 stands for a branched hydrocarbon radical, R.sup.2 stands for a hydrocarbon radical which is the same as or different from R.sup.1 and n stands for a number satisfying an equation: 1.ltoreq.n.ltoreq.3;Component B which is an organoaluminum compound; andComponent C which is a compound represented by a formula M(OR.sup.4).sub.x R.sup.5.sub.y X.sub.z in which M stands for an element selected from the group consisting of B, Al, C, Si, Sn, P, S, Cl, Br, I, Fe, Ti, V, Zr, Mg, Ca and Zn, R.sup.4 and R.sup.

Abstract: Catalyst for polymerization of .alpha.-olefines, comprising an organoaluminum compound, an electron donor, as well as a solid catalyst component which is obtained when a compound containing magensium reacts with a titanium halogen compound. A method for producing the catalyst is also provided. The catalyst component is manufactured by reacting with a titanium halogen compound in the presence of an internal electron donor, a solid catalyst component which has been produced by the steps of(a) reacting a magnesium alkyl compound with a chlorinating compound,(b) dissolving the chlorinated magnesium alkyl compound in alcohol, after possible washing,(c) adding into the solution, magnesium silicate which has been calcinated by heating at about 200.degree.-600.degree. C.,(d) adding the mixture obtained in step (c) into a cold medium, to precipitate the magnesium compound into and onto the magnesium silicate carrier, and(e) separating the thus-obtained solid carrier component.

Abstract: A method for the production of a catalyst component for use in the polymerization of an olefin, which method comprises causing a magnesium-containing solid obtained by contact of (A) magnesium metal, (B) a halogenated hydrocarbon represented by the general formula, RX [wherein R stands for an alkyl, aryl, or cycloalkyl group having 1 to 20 carbon atoms and X for a halogen atom], and (C) a compound of the general formula, X.sub.n.sup.1 M(OR.sup.1).sub.m-n [wherein X.sup.1 stands for a hydrogen atom, a halogen atom, or a hydrocarbon group having 1 to 20 carbon atoms, M for a boron, carbon, silicon, aluminum, or phosphorus atom, R.sup.1 for a hydrocarbon group having 1 to 20 carbon atoms, and m for the valency of said atom M, providing that m>n.gtoreq.0 is satisfied], to contact (D) a halogen-containing alcohol and then contact (E) an electron donor type compound and (F) a titanium compound.

Abstract: A solid catalyst component containing a trivalent titanium compound, obtained by reducing a titanium compound represented by the general formula Ti(OR.sup.1).sub.n X.sub.4-n (wherein R.sup.1 is a hydrocarbon group of 1 to 20 carbon atoms, X is a halogen atom, and n is a number satisfying 0<n.ltoreq.4) with an organomagnesium compound in the presence of an alcohol compound and/or a phenol compound to obtain a solid product and then treating the solid product with a mixture of an ether compound and titanium tetrachloride; a catalyst system comprising:(A) said solid catalyst component, and(B) an organoaluminum compound; and a process for producing an olefin polymer, which comprises homopolymerizing an olefin or copolymerizing olefins using said catalyst system.

Abstract: A manufacturing method of polyolefin characterized in that at least one kind of olefins is allowed to polymerize in the presence of a catalyst system comprising(A) solid catalyst ingredient (A) obtained through the successive reaction steps, wherein, with a homogeneous solution involving(i) at least one member selected from metallic magnesium and hydroxylated organic compounds and oxygen-containing organic compounds of magnesium, and(ii) at least one kind of oxygen-containing organic compounds of titanium, are allowed to react in sequence with:(iii) at least one kind of organoaluminum compounds, then(iv) at least one kind of silicon compounds and further(V) at least one kind of halogenated aluminum compounds and(B) at least one kind of catalyst ingredients (B) selected from organometallic compounds, the metal of which belongs to Ia, IIa, IIb, IIIb or IVb group in the periodic table.

Abstract: Crystalline magnesium olefin polymerization catalyst components capable of producing polymer with improved activity and morphological properties are disclosed and claimed. In particular, the components are prepared by reacting a crystalline alkoxy magnesium compound with a halide of tetravalent titanium.

Abstract: A random 1-butene copolymer comprising 1-butene and an alpha-olefin having 5 to 20 carbon atoms, said copolymer having the following characteristics (A) to (I):(A) it comprises 50 to 99 mole % of the 1-butene component and 1 to 50 mole % of the alpha-olefin component,(B) it has an intrinsic viscosity [.eta.], measured in decalin at 135.degree. C., of from 0.5 to 6 dl/g,(C) it has a melting point [Tm], measured by a differential scanning calorimeter, of from 30.degree. to 120.degree.0 C.,(D) it has a crystallinity, measured by X-ray diffractometry, of from 5 to 60%,(E) the amount [W.sub.1 in % by weight] of that portion of it which is soluble in boiling methyl acetate is not more than 2%, and(F) the amount [W.sub.2 in % by weight] of that portion of it which is soluble in a 1:1 by volume mixture of acetone and n-decane at 10.degree. C. is less than 5.times.[.eta.].sup.-1.2.

Abstract: The present invention relates to an improvement of the known Ziegler catalyst which comprises a combination of a titanium-containing component and an organoaluminum component, and the present invention is characterized by a specific titanium-containing component. Namely, this titanium-containing component is obtained by contacting a known titanium-containing component of the Ziegler type catalyst which comprises Ti, Mg and a halogen, with an alkoxyalkylsilane compound which is characterized in that at least one of the alkyl groups has a branched structure. This catalyst does not require a so-called external electron donor, and no reduction of the polymerization velocity caused by the use of the electron donor is entailed. When this catalyst is used, a propylene/ethylene block copolymer in which the molecular weight of the propylene/ethylene copolymer portion and/or the polyethylene portion is increased, that is, the rigidity and impact strength are increased, can be prepared.

Abstract: A catalyst component for alpha olefine-polymerizing catalysts which comprise an organoaluminum compound, an external electron donor, and a solid catalyst component obtained when a solid carrier component containing magnesium has reacted with a titanium halide compound, in addition to a procedure for manufacturing the same. The catalyst component is produced by reacting a solid carrier component with a titanium halide compound with or without the presence of an internal electron donor. The solid carrier component is prepared by(a) dissolving or suspending a magnesium compound in ethanol or water,(b) adding to the solution or suspension, hydrochloric acid in a substantially stoichiometric quantity to the magnesium, to completely dissolve the same,(c) drying the magnesium solution with the aid of periodic azeotropic distillation, and(d) precipitating the solid carrier component from the thus-dried solution.

Abstract: A catalyst component for alpha olefine-polymerizing catalysts which comprise an organoaluminum compound, an external electron donor, and a solid catalyst compound obtained when a solid carrier component containing magnesium has reacted with a titanium halide compound, in addition to a procedure for manufacturing the same. The catalyst component is produced by reacting a solid carrier component with a titanium halide compound with or without the presence of an internal electron donor. The solid carrier component is prepared by:(a) mixing an aqueous solution or alcoholic suspensions of magnesium sulfate with an equeous or alcoholic solution of barium or calcuim chloride,(b) separating the undissolved material therefrom,(c) evaporating the remaining solution until dry,(d) heating the obtained residue at 130.degree. to 150.degree. C.

Abstract: A catalyst component for alpha olefine-polymerizing catalysts which comprise an organoaluminum compound, an external electron donor, and a solid catalyst compound obtained when a solid carrier component containing magnesium has reacted with a titanium halide compound, in addition to a procedure for manufacturing the same. The catalyst component is produced by reacting a solid carrier component with a titanium halide compound with or without the presence of an internal electron donor. The solid carrier component is prepared by(a) dissolving, in hydrochloric acid, a magnesium compound selected from the group consisting of magnesium hydroxide, magnesium carbonate, magnesium oxide, and natural and/or synthetic minerals containing the same,(b) evaporating the solution until dry,(c) heating the obtained salt mixture at 130.degree. to 150.degree. C.

Abstract: A catalyst component for alpha olefine-polymerizing catalysts which comprise an organoaluminum compound, an external electron donor, and a solid catalyst compound obtained when a solid carrier component containing magnesium has reacted with a titanium halide compound, in addition to a procedure for manufacturing the same. The catalyst component is produced by reacting a solid carrier component with a titanium halide compound with or without the presence of an internal electron donor. The solid carrier component is prepared by(a) precipitating a water-soluble magnesium compound from an aqueous solution thereof by adding an alkali thereto,(b) separating the thus-precipitated magnesium component and dissolving the same in hydrochloric acid,(c) evaporating the solution until dry,(d) heating the obtained salt mixture at 130.degree. to 150.degree. C.

Abstract: A catalyst component for alpha olefine-polymerizing catalysts which comprise an organo-aluminum compound, an external electron donor, and a solid catalyst component obtained when a solid carrier component containing magnesium has reacted with a titanium halide compound, in addition to a procedure for manufacturing the same. The catalyst component is produced by reacting a solid carrier component with a titanium halide compound with or without the presence of an internal electron donor. The solid carrier component is prepared by(a) dissolving a natural or synthetic mineral containing magnesium and aluminum in hydrochloric acid,(b) evaporating the solution until dry,(c) calcinating the obtained salt mixture from the evaporated solution by heating the same at a temperature of about 130.degree.-150.degree. C.

Abstract: Olefin polymerization catalyst components having improved activity and morphological properties are disclosed and claimed. In particular, the components are prepared by reacting a carbonized magnesium alkoxide or aryloxide component with a halogenated tetravalent titanium component, a halohydrocarbon component and an electron donor.

Abstract: A process for polymerizing or copolymerizing ethylene comprises contacting ethylene or ethylene and at least one of .alpha.-olefins with a catalyst consisting essentially of a combination of (A) a solid catalyst component containing at least titanium, magnesium and chlorine, (B) an organoaluminum compound, and (C) an organic compound selected from the group consisting of a compound having P-O-C bond, a compound having B-O-C bond and a compound having C-O-R bond, at a temperature not lower than 125.degree. C. and under a pressure not lower than 200 kg/cm.sup.2.

Abstract: A process for activating a titanium or vanadium compound and producing polyethylene comprising (i) dissolving a divalent magnesium halide and a Lewis acid having the formula R.sub.m A1X.sub.n or R.sub.m BX.sub.

Abstract: A process for polymerizing or copolymerizing ethylene, characterized in that ethylene or a mixture of ethylene with other .alpha.-olefin is polymerized in the presence of a catalyst comprising:[I] a solid catalyst component (B) obtained by reacting the following three components:(a) a reaction product (A) of an organomagnesium compound with a hydropolysiloxane or a silicon compound in which organic groups and hydroxyl groups are bonded to silicon atoms,(b) a silicon compound of the formula R.sub.l.sup.1 Si(OR.sup.2).sub.m X.sub.4-(l+m), wherein R.sup.1 is a hydrogen atom or a hydrocarbon group having from 1 to 8 carbon atoms, R.sup.2 is a hydrocarbon group having from 1 to 12 carbon atoms, X is a halogen atom, l is 0, 1 or 2, and m is a number of from 0 to 4, and(c) a titanium compound of the formula Ti(OR.sup.3).sub.n X.sub.4-n, wherein R.sup.

Abstract: A process for producing catalyst ingredient for use in olefin polymerization which comprises contacting (A) a magnesium hydrocarbyloxide and (B) a silicon compound having hydrogen-silicon bonds in the presence of a hydrocarbon medium, contacting the thus obtained solid product (C) a halogenated titanium compound in the presence or absence of a hydrocarbon medium and then adding to contact (D) an electron donating compound.

Abstract: A catalyst component for the polymerization of olefins which is prepared by contacting (1) a contact reaction product of (a) a metal oxide, (b) a dihydrocarbyl magnesium, and (c) a halogen-containing alcohol held with (d) an electron-donating compound, and (e) a titanium compound.

Abstract: A solid catalyst component which can produce .alpha.-olefin polymers having a high stereoregularity and a good powder fluidity, stably and with a good efficiency in gas phase polymerization, particularly in gas phase copolymerization, a catalyst for .alpha.-olefin polymerization using the above solid catalyst component and a process for producing the above catalyst component, are provided,which solid catalyst component is charcterized in that it contains titanium as an active ingredient and is in the form of hollow fine particles, andwhich process is characterized by adding a reaction product (I) of an organoaluminum compound (A) with an electron dnor (B.sub.1) to TiCl.sub.4 and reacting these under agitation in a baffle ratio of 0.35 or less with a power required for agitation of 2.50 KW/m.sup.3 or less at a temperature of 0.degree. to 70.degree. C. for a period of 1 to 10 hours and further reacting an electron donor (B.sub.