abstract |
An olefin polymerization catalyst comprising:n (A) a solid catalyst component containing a trivalent titanium, which is represented by the composition formula nMg m Ti(OR) n X p [ED] q n(wherein R is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen, ED is a electron donative compound, and m, n, p and q are each a number satisfying 1 ≦ m ≦ 51, 0 < n ≦ 5, 5 ≦ p ≦ 106 and 0.2 ≦ q ≦ 2) obtained by reducing a titanium compound represented by the general formula Ti(OR¹) a X 4-a (wherein R¹ is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom and a is a number satisfying 0 < a ≦ 4) with an organomagnesium compound in the presence of an organic silicon compound having at least one Si-O bond and an organic porous polymer, treating the resulting solid product with an ester compound and then reacting it with titanium tetrachloride or a mixture of titanium tetrachloride and an electron donative compound, and (B) an organoaluminum compound, and a process for producing an ethylene copolymer using the same. |