Abstract: A catalyst component for polymerization of olefins which is prepared by bringing a magnesium alkoxide, a halogenated hydrocarbon, and a titanium compound into contact with one another. The catalyst component together with a organoaluminum cocatalyst is used for the polymerization of olefins and especially for the homopolymerization of ethylene and copolymerization of ethylene with an .alpha.-olefin having from 3 to 10 carbon atoms.

Abstract: A catalyst for polymerizing ethylene and .alpha.-olefins and process for producing ethylene polymers which comprises homopolymerizing ethylene or copolymerizing ethylene and other olefins in the presence of a catalyst comprising a catalyst component and an organoaluminum compound, said catalyst component being obtained by mechanically copulverizing (A) a magnesium halide and (B) magnesium hydrocarbyloxide at a molar ratio of B/A=0.5 to 1.5 and subsequently bringing the resulting pulverized product into contact with a tetravalent titanium halide in the presence of a hydrocarbon and/or halogenated hydrocarbon.

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 supported titanium catalyst component is produced by cogrinding an organo aluminum catalyst component with a supported titanium (IV) halide on a magnesium halide. The resulting supported titanium halide catalyst component, when employed with an organo aluminum catalyst component to form a catalyst system is highly useful for the stereoregular polymerization of .alpha.-olefins as well as the copolymerization of .alpha.-olefins.

Abstract: A process for producing a magnesium containing support for titanium comprising contacting magnesium metal, a halogenated hydrocarbon and a compound represented by the formula X'.sub.m C(OR').sub.4-m wherein X' is a hydrogen atom, a halogen atom or a C.sub.1 -C.sub.10 alkyl, aryl, cycloalkyl or halogenated alkyl, aryl, cycloalkyl group, R' is a C.sub.1 -C.sub.20 alkyl, aryl or cycloalkyl group and m is 0, 1 or 2 to form a magnesium-containing solid represented by the formula R'OMgX and thereafter contacting the magnesium-containing solid with a Lewis base or a compound which can form an ester such as benzoyl chloride and a titanium compound such as titanium tetrachloride. The obtained magnesium supported titanium composition is useful as a catalyst component in combination with a co-catalyst organoaluminum compound for the polymerization of olefins.

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 polymerization of alpha-olefins, is produced by treating a supported titanium-containing solid obtained by co-pulverization of a magnesium halide, a tetravalent titanium halide which may also comprise an electron donor compound and/or a halogen compound with an organohalogen compound. The component is thereafter treated with an organoaluminum compound and an electron donor compound. The resulting supported titanium catalyst, one employed as a titanium component with an organoaluminum catalyst component results in a catalyst system useful for the polymerization of alpha-olefins and particularly alpha-olefins.

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: 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 supported titanium catalyst component is produced by cogrinding in the presence of an ethylenically unsaturated hydrocarbon an organo aluminum catalyst component with a supported titanium (IV) halide on a magnesium halide until the intensity of the 14.8.degree. and 30.2.degree. x-ray diffraction peak of magnesium halide are reduced in intensity. The resulting supported titanium halide catalyst component, when employed with an organo aluminum catalyst component to form a catalyst system is highly useful for the stereoregular polymerization of .alpha.- olefins as well as the copolymerization of .alpha.-olefins.

Abstract: A supported titanium catalyst is produced by cogrinding, in combination, a magnesium halide, tetravalent titanium halide, organic acid ester, and a halogen compound selected from organic halogen compounds and halogen-containing compounds of Group IVa elements of the Periodic Table except carbon, and then treating the resulting titanium-containing solid with a hydrocarbon and/or a halogen compound as described above. 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 results in unexpectedly high polymerization activity and 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: 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 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: A process for the production of a catalyst component for use in the polymerization of .alpha.-olefins, which comprises reducing titanium tetrachloride with an organo aluminum compound having the general formula Al Rn X.sub.3-n wherein R represents a hydrocarbon group having 1 to 18 carbon atoms, x represents a halogen atom and n represents a suitable numeral between o<n.ltoreq.3, to thus obtain a reduced solid, then removing aluminum compounds contained in said reduced solid and activating with a mixture or a complex of titanium tetrachloride and a dialkyl ether of the general formula R'OR" wherein R' and R" are (a) alkyl groups having 1-4 carbon atoms, (b) normal alkyl groups having five carbon atoms, or (c) alkyl groups having 6-20 carbon atoms.

Abstract: The invention relates to a process for the production of a catalyst component for use in the polymerization of .alpha.-olefins, which comprises reacting titanium tetrachloride with a dialkylaluminum monohalide and monoalkylaluminum dihalide, said dialkylaluminum monohalide being in a proportion of at least equimolar to said titanium tetrachloride, to thus obtain a violet reduced solid, then removing aluminum compounds contained in said reduced solid and further activating with a mixture or complex of titanium tetrachloride and a dialkyl ether of the general formula ROR' wherein R and R' are the same or different and are (a) alkyl groups having 1-4 carbon atoms, (b) normal alkyl groups having 5 carbon atoms or (c) alkyl groups having 6-20 carbon atoms and to a catalyst component prepared by the process of the invention.

Abstract: This invention relates to a catalyst composition for polymerization of propylene, having high activity and producing polypropylene of high stereoregularity and having a low particle size distribution, which comprises;1. reducing TiCl.sub.4 by diethylaluminum chloride (DEAC), thereby forming a reduced solid (TiCl.sub.3),2. removing the aluminum compounds from the reduced catalyst,3. treating the said reduced solid with the mixture or complex of TiCl.sub.4 and diisoamylether (IAE) and4. separating the solid catalyst from the mixture.The aluminum compounds may be removed by washing with a complexing agent therefor; in a preferred embodiment the complexing agent is di-n-butyl ether.

Abstract: The invention relates to a method for preparing a catalyst composition for polymerization of propylene, having high activity and producing polypropylene of high stereoregularity in narrow particle size distribution, which comprises:1. reducing TiCl.sub.4 by a mixture of diethylaluminum chloride (DEAC) and ethylaluminum dichloride (EADC), thereby forming a reduced solid (TiCl.sub.3),2. removing the aluminum compound from the reduced solid;3. treating the said reduced solid with a mixture or complex of TiCl.sub.4 and diisoamylether (IAE), and4. separating the solid catalyst from the solution.Preferably step 2 is performed by washing with a complexing agent for the aluminum compound.