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US 6,605,560 B1Granted
Polymerization catalyst systems, their production and use
AssigneeUnivation Technologies, LLC
InventorMain Chang
Life of this patent
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Abstract
This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported metallocene catalyst formed by vacuum or pressurized impregnation.
Claims12
A method for forming a supported catalyst system comprising the steps of:
- (a) introducing a porous inorganic carrier to a vessel having a starting pressure,
- (b) depressurizing the vessel,
- (c) introducing into the vessel a solution comprising a metallocene catalyst component and an activator while maintaining the depressurized pressure from step (b),
- (d) pressurizing the vessel, and
- (e) recovering the supported catalyst system, steps (a) and (b) are performed before step (c).
2 more elements
Dependencies are inferred from the claim text.