Polymerization process
AssigneeUnivation Technologies, LLC
InventorsSusan L. Bell, Abdul Gaffar Vadagama
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Abstract
The present invention relates to a catalyst composition of an activator, a catalyst compound and a support in a liquid. The catalyst composition of the invention is utilized as prepared, in the liquid, in a process for polymerizing olefin(s), preferably a slurry polymerization process.
Claims14
A process for polymerizing ethylene alone, or in combination with one or more alpha-olefin(s) in the presence of a catalyst composition in a reactor, the catalyst composition is in a slurry of a support, having a pore volume, a bulky ligand metallocene catalyst compound and an activator, the slurry comprising a solids to liquid ratio wherein the liquid has a volume of less than four times the pore volume of the support;
- wherein the slurry is mixed for a period of time from about 1 minute to 5 hours prior to its use.
A slurry process for polymerizing monomer(s) in a reactor in the presence of a catalyst composition to form a polymer product, said process comprising the steps of:
- (a) introducing one or more monomer(s) to the reactor, the reactor comprising a liquid polymerization diluent medium and other volatile components;
- (b) introducing to the reactor the catalyst composition within 1 minute to 5 hours after combining in a liquid, a catalyst compound, an activator and a support, wherein the catalyst composition is used as is without evaporating or dehydrating any of the liquid;
- (c) withdrawing the diluent and other volatile components, intermittently or continuously, from the reactor;
- and
- (d) separating the volatile components from the polymer and recycling, optionally after a distillation, the resulting medium to the reactor with fresh monomer(s).
Dependencies are inferred from the claim text.