Patent ID: 7385015

Claim:
A process to polymerize olefins comprising: A) preparing a supported metallocene catalyst compound by a process comprising: 1) combining a support with first trialkylaluminum compound(s) selected from the group consisting of triethylaluminum, tri-isobutylaluminum, and tri-n-hexylaluminum; then 2) calcining the combination of the support and the trialkylaluminum compound(s); then 3) combining the calcined support with a solvent or diluent and second trialkylaluminum compound(s) selected from the group consisting of triethylaluminum, tri-isobutylaluminum, and tri-n-hexylaluminum; where the first and second trialkylaluminum compound(s) may be the same or different; then 4) optionally, drying the combination; 5) combining the combination of the calcined support and the second trialkylaluminum compound(s) with a metallocene catalyst compound and, optionally, a solvent or diluent; then, 6) optionally, removing the solvent or diluent; then B) contacting the supported transition metal catalyst compound with one or more olefins.