Process for producing alpha-olefin polymerization catalyst
AssigneeSumitomo Chemical Company, Limited
InventorYasuki FUJIWARA
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Abstract
A production process of an α-olefin polymerization catalyst, comprising the steps of (1) reducing a titanium compound represented by a defined formula with an organomagnesium compound in the presence of an Si—O bond-containing silicon compound, (2) contacting the resultant solid catalyst component precursor, a halogenating compound and an internal electron donor with one another, and (3) contacting the resultant solid catalyst component, an organoaluminum compound and a Si-containing external electron donor represented by a defined formula with one another; and a production process of an olefin polymer using the above catalyst.
Claims6
A process for producing an α-olefin polymerization catalyst, comprising the steps of:
- (1) reducing a titanium compound represented by the following formula (I) with an organomagnesium compound in the presence of an Si—O bond-containing silicon compound, thereby forming a solid catalyst component precursor;
- (2) contacting the solid catalyst component precursor, a halogenating compound and an internal electron donor with one another, thereby forming a solid catalyst component containing titanium atoms, magnesium atoms and halogen atoms;
- and
- (3) contacting the solid catalyst component, an organoaluminum compound and an external electron donor represented by the following formula (II) with one another;
- wherein R1 is a hydrocarbyl group having 1 to 20 carbon atoms;
- X1 is independently of one another a halogen atom or a hydrocarbyloxy group having 1 to 20 carbon atoms;
- and a is a number of 1 to 20;
- and
- R2Si(OC2H5)3 (II)
- wherein R2 is a hydrocarbyl group having 3 to 20 carbon atoms, and a carbon atom contained in the hydrocarbyl group and directly linked to the silicon atom is a secondary carbon atom.
Dependencies are inferred from the claim text.