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AssigneeIdemitsu Petrochemical Co., Ltd.
InventorsShohjiroh Tanase, Takehiro Tsuda, Tsuyoshi Ota, Hideo Funabashi
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The invention relates to a magnesium compound effective in producing olefin polymers having an increased bulk density and a narrowed particle size distribution, not lowering the stereospecificity of the polymers produced and not lowering the polymerization activity in producing the polymers, to an olefin polymerization catalyst comprising the compound, and to a method for producing such olefin polymers. The olefin polymerization catalyst comprises (A) a solid catalyst component prepared by contacting a magnesium compound having a specific particle size distribution index (P), a titanium compound and an electron donor compound with each other, (B) an organometallic compound, and (C) an electron donor. The olefin polymerization method comprises polymerizing an olefin in the presence of the catalyst to give olefin polymers.
A magnesium compound consisting essentially of a magnesium dialkoxide, prepared by reacting metallic magnesium, an alcohol and 0.0001 to less than 0.06 gram atom, in terms of halogen atoms relative to one gram atom of magnesium, of a halogen and/or a halogen-containing metal compound, at 30° to 60° C.
A magnesium compound consisting essentially of a magnesium dialkoxide prepared by reacting metallic magnesium, an alcohol and at least 0.0005 to less than 0.06 gram atoms, in terms of halogen atoms relative to one gram atom of magnesium, of a halogen and/or a halogen-containing metal compound, in the presence of a saturated hydrocarbon compound.
A magnesium compound consisting essentially of magnesium dialkoxide prepared by reacting a combination of reactants consisting essentially of metallic magnesium, a hydrocarbyl alcohol and 0 0001 to less than 0.06 gram atoms, in terms of halogen atoms relative to one gram atom of magnesium, of a halogen and/or a halogen-containing metal compound, at 30° to 60° C.
A magnesium compound consisting essentially of magnesium dialkoxide prepared by reacting a combination of reactants consisting essentially of metallic magnesium, a C1-6-aliphatic alcohol and 0.0001 to less than 0.06 gram atoms, in terms of halogen atoms relative to one gram atom of magnesium, of a halogen and/or a halogen-containing metal compound, at 30° to 60° C.
A magnesium compound consisting essentially of magnesium dialkoxide prepared by reacting metallic magnesium, a C1-6-aliphatic alcohol and at least 0.0005 to less than 0.06 gram atoms, in terms of halogen atoms relative to one gram atom of magnesium, of a halogen and/or a halogen-containing metal compound, in the presence of a saturated hydrocarbon compound.
A magnesium alkoxide compound consisting essentially of a magnesium dialkoxide prepared by reacting metallic magnesium, an alcohol and 0.0001 to less than 0.06 gram atom, in terms of halogen atoms relative to one gram atom of magnesium, of a halogen and/or a halogen-containing metal compound, at 30° to 60° C., the particulate magnesium dialkoxide compound obtained having a mean particle size ranging from 38 to 60 μm, a degree of sphericity S of less than 2 and a particle size distribution index (P) of less than 4.0.
Dependencies are inferred from the claim text.