Patent ID: 7456126

Claim:
A method for preparing a Ziegler-Natta catalyst for olefin polymerization, which is produced by a method comprising a step of reacting a transition metal compound having a general formula of MX p−(q+r) (OAr 1 ) q (OAr 2 ) r , with an organomagnesium compound having a general formula of MgX 2−m R m , wherein M represents a transition metal having an oxidation number of 4 or more, selected from Groups IV, V or VI of the Periodic table; X represents a halogen atom; Ar1 and Ar2 each represents substituted or unsubstituted aryl group of 6 to 30 carbon atoms, in which the Ar1 and Ar2 are not linked to each other; p represents the oxidation number of M of 4 or more; q and r satisfy 0≦q≦p, 0≦r≦p and 2≦q+r≦p; R represents an alkyl group of 1 to 16 carbon atoms; and m satisfies 0<m≦2.