Alpha-olefin polymerization catalyst and process for producing alpha-olefin polymer

摘要

An alpha-olefin polymerization catalyst comprising (A) a solid catalyst component containing a titanium compound obtained by treating a solid product having a titanium content of 1.5% by weight or less obtained by reducing Ti(OR<1>)aX4-a (R<1 >represents a hydrocarbon group having 1 to 20 carbon atoms, X represents a halogen atom and a represents a number satisfying 0<a<=4.) with an organomagnesium compound in the presence of an organosilicon compound having an Si-O bond and an ester compound, with an ester compound, and treating the ester-treated solid with a mixture of an ether compound and titanium tetrachloride or a mixture of an ether compound, titanium tetrachloride and an ester compound, (B) an organoaluminum compound and (C) an electron donative compound, and a process for producing an alpha-olefin polymer with said alpha-olefin polymerization catalyst.