| US 7,385,015 B2 | ||
| Trialkylaluminum treated supports | ||
| Matthew W. Holtcamp, Huffman, Tex. (US) | ||
| Assigned to Exxonmobil Chemical Patents Inc., Houston, Tex. (US) | ||
| Filed on Sep. 06, 2005, as Appl. No. 11/220,164. | ||
| Claims priority of provisional application 60/617952, filed on Oct. 12, 2004. | ||
| Prior Publication US 2006/0079394 A1, Apr. 13, 2006 | ||
| Int. Cl. C08F 4/02 (2006.01); C08F 4/6392 (2006.01); C08F 4/6592 (2006.01) | ||
| U.S. Cl. 526—160 [526/129; 526/943; 526/348; 502/104; 502/120; 502/152] | 19 Claims |
| 1. 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.
|