Patent ID: 7084216

Claim:
A process for homopolymerization of ethylene or copolymerization of ethylene with alpha-olefins comprising contacting ethylene or ethylene and alpha-olefin with a catalyst composition comprising: (i) a solid catalyst precursor consisting essentially of at least one vanadium compound represented by the general formulas V(OR 1 ) n X 4−n , V(R 2 ) n X 4−n , VX 3 and VOX 3 wherein R 1 and R 2 represent an alkyl group, aryl group or cycloalkyl group having 1 to 20 carbon atoms, and X represents a halogen and n represents a number satisfying 0≦n≦4, a titanium compound represented by the general formulas Ti(OR 3 ) n X 4−n , TiOX 3 and Ti(R 4 ) n X 4−n , R 3 and R 4 represent an alkyl group, aryl group or cycloalkyl group having 1 to 20 carbon atoms, X represents a halogen atom and n represents a number satisfying 0≦n≦4 at least one Grignard compound represented by the general formula R 6 MgX wherein R 6 is a hydrocarbon group having 1 to 20 carbon atoms and X is a halogen atom or a dialkyl magnesium compound represented by the general formula R 7 R 8 Mg, wherein R 7 and R 8 are each a hydrocarbon group having 1 to 20 carbon atoms, and a polyvinylchloride polymeric support; and (ii) a cocatalyst comprising an aluminum compound represented by the general formula R 9 n AlX 3−n wherein R 9 represents a hydrocarbon group having 1 to 10 carbon atoms; X represents a halogen and n represents a number satisfying 0≦n≦3, or by the general formula R 10 R 11 Al—O—AlR 12 R 13 , wherein R 10 , R 11 , R 12 and R 13 are either the same or different linear, branched or cyclic alkyl group having 1 to 12 carbons, or is an aluminoxane.