Patent ID: 7763561

Claim:
A catalyst composition comprising a contact product of at least one organometal compound, at least one organoaluminum compound, and at least one treated solid oxide compound, wherein the at least one organometal compound has the following general formula: (X 1 )(X 2 )(X 3 )(X 4 )M 1 wherein M 1 is titanium, zirconium, or hafnium, wherein (X 1 ) is independently a cyclopentadienyl, an indenyl, a fluorenyl, a substituted cyclopentadienyl, a substituted indenyl, or a substituted fluorenyl, and wherein each substituent on the substituted cyclopentadienyl, the substituted indenyl, or the substituted fluorenyl, is an aliphatic group, a cyclic group, a combination of the aliphatic and cyclic groups, an organometallic group, or hydrogen; wherein (X 3 ) and (X 4 ) are independently a halide, an aliphatic group, a cyclic group, a combination of aliphatic and cyclic groups, or an organometallic group; wherein (X 2 ) is a halide, an aliphatic group, a cyclic group, a combination of aliphatic and cyclic groups, an organometallic group, a cyclopentadienyl, an indenyl, a fluorenyl, a substituted cyclopentadienyl, a substituted indenyl, or a substituted fluorenyl, and wherein each substituent on the substituted cyclopentadienyl, the substituted indenyl, or the substituted fluorenyl, is an aliphatic group, a cyclic group, a combination of the aliphatic and cyclic groups, an organometallic group, or hydrogen; wherein the at least one organoaluminum compound has the following general formula: Al(X 5 ) n (X 6 ) 3-n wherein (X 5 ) is a hydrocarbyl having from 1-20 carbon atoms; wherein (X 6 ) is a halide, a hydride, or an alkoxide; wherein “n” is a number from 1 to 3 inclusive; wherein the at least one treated solid oxide compound comprises the calcined contact product of at least one solid oxide compound and at least one electron-withdrawing anion source compound; wherein the at least one solid oxide compound is B 2 O 3 , BeO, Bi 2 O 3 , CdO, Co 3 O 4 , Cr 2 O 3 , CuO, Fe 2 O 3 , Ga 2 O 3 , La 2 O 3 , Mn 2 O 3 , MoO 3 , NiO, P 2 O 5 , Sb 2 O 5 , SiO 2 , SnO 2 , SrO, ThO 2 , TiO 2 , V 2 O 5 , WO 3 , Y 2 O 3 , ZnO, ZrO 2 , silica-alumina, silica-zirconia, alumino-phosphate, or any mixture thereof; wherein the at least one treated solid oxide compound has a surface area greater than 100 m 2 /g; and wherein there is a substantial absence of aluminoxanes and borate compounds; wherein the activity of the catalyst composition is greater than 100 grams of polyethylene per gram of treated solid oxide compound per hour under slurry polymerization conditions, using isobutane as a diluent, with a polymerization temperature of 90° C., and an ethylene pressure of 550 psig.