Metallocene catalyst systems, preparation, and use
AssigneePhillips Petroleum Company
InventorsRolf L. Geerts, Syriac J. Palackal, Ted M. Pettijohn, Robert M. Infield
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Abstract
In accordance with the present invention, there is provided catalyst systems and processes for preparing such catalyst systems comprising reacting a metallocene compound, a solid organoaluminoxy product, and an organometal compound. Further there is provided processes for the polymerization of olefins using the catalyst systems.
Claims23
A process for preparing an olefin polymerization catalyst system comprising reacting a metallocene compound, a solid organoaluminoxy product, and an organometal compound represented by the formula R.sub.m EX.sub.n, where R is a hydrocarbyl radical having 1 to 20 carbon atoms, E is Mg, Al, B, Ga, or Zn, X is hydride, halide, --OR' wherein R' is an alkyl radical containing 1 to 8 carbon atoms, or --NH.sub.2, m is 1 to 3, n is 0 to 2, and the sum of m plus n equals the valence of E;
- wherein said solid organoaluminoxy product is prepared by reacting an organoaluminoxane and an oxygen-containing compound selected from the group consisting of organo boroxines, organic peroxides, alkylene oxides, and organic carbonates;
- wherein said organoaluminoxane is represented by the formulas:
- ##STR7## wherein each R.sub.1 is a hydrocarbyl radical containing 1 to 8 carbon atoms, x is 2 to 50, and y is 3 to 50.
A process for preparing an olefin polymerization catalyst system comprising reacting a metallocene compound, a solid organoaluminoxy product, and an organometal compound;
- wherein said metallocene compound is selected from the group consisting of bis(cyclopentadienyl)zirconium dichloride, bis(n-butylcyclopentadienyl) zirconium dichloride, (cyclopentadienyl)(fluorenyl)methane zirconium dichloride, and bis(fluorenyl)ethane zirconium dichloride;
- wherein said solid organoaluminoxy product is prepared by reacting methylaluminoxane and methylboroxine or methoxyboroxine;
- and
- wherein said organometal compound is trimethylaluminum or triethylaluminum.
A catalyst system useful in olefin polymerization, said catalyst system comprising the reaction product of a metallocene compound, a solid organoaluminoxy product, and an organometal compound represented by the formula R.sub.m EX.sub.n, where R is a hydrocarbyl radical having 1 to 20 carbon atoms, E is Mg, Al, B, Ga, or Zn, X is hydride, halide, --OR' wherein R' is an alkyl radical containing 1 to 8 carbon atoms, or --NH.sub.2, m is 1 to 3, n is 0 to 2, and the sum of m plus n equals the valence of E;
- wherein said solid organoaluminoxy product is prepared by reacting an organoaluminoxane and an oxygen-containing compound selected from the group consisting of organo boroxines, organic peroxides, alkylene oxides, and organic carbonates;
- wherein said organoaluminoxane is represented by the formulas:
- ##STR8## wherein each R is a hydrocarbyl radical containing 1 to 8 carbon atoms, n is 2 to 50, and m is 3 to 50.
A catalyst system useful in olefin polymerization, said catalyst system consisting essentially of the reaction product of a metallocene compound, a solid organoaluminoxy product, and an organometal compound represented by the formula R.sub.m EX.sub.n, where R is a hydrocarbyl radical having 1 to 20 carbon atoms, E is Mg, Al, B, Ga, or Zn, X is hydride halide, --OR' wherein R' is an alkyl radical containing 1 to 8 carbon atoms, or --NH.sub.2, m is 1 to 3, n is 0 to 2, and the sum of m plus n equals the valence of E;
- wherein said solid organoaluminoxy product is prepared by reacting an organoaluminoxane and an oxygen-containing compound selected from the group consisting of organo boroxines, organic peroxides, alkylene oxides, and organic carbonates;
- and
- wherein said organoaluminoxane is represented by the formulas:
- ##STR9## wherein each R is a hydrocarbyl radical containing 1 to 8 carbon atoms, x is 2 to 50, and y is 3 to 50.
Dependencies are inferred from the claim text.