Patent ID: 7193022

Claim:
A method for (co)polymerization of ethylene which is carried out in the presence of (a) and (b) below: (a) a solid titanium complex catalyst prepared by a method comprising the steps of: (i) preparing a magnesium solution by contacting halogenated magnesium compounds with alcohol; (ii) reacting the magnesium solution with ester compound having at least one hydroxyl group and silicon compound having alkoxy group; (iii) preparing a solid titanium catalyst component by reacting the product from step (ii) with a mixture of titanium compound and haloalkane compound; and (iv) producing a solid titanium complex catalyst by reacting the solid titanium catalyst component with a mixture of aluminum compound and haloalkane compound, or with haloalkane, (b) organometallic compounds in Group II or III of the Periodic Table.