Methods for Preparing Catalyst Systems
AssigneeUnivation Technologies, LLC
InventorsMichael D. Awe, Natarajan Muruganandam, Phuong A. Cao
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Abstract
A process to prepare a catalyst composition that includes combining catalyst precursors in a recycled organic reaction solvent; allowing the catalyst precursors to react to form a catalyst compound; and separating the formed catalyst compound from the reaction solvent is disclosed.
Claims20
A process to prepare a catalyst composition, comprising:
- combining catalyst precursors in a recycled organic reaction solvent;
- allowing the catalyst precursors to react to form a catalyst compound;
- and
- separating the formed catalyst compound from the reaction solvent.
The process of any one of the preceding claims, wherein the organic reaction solvent comprises a non-coordinating or weakly coordinating solvent.
The process of any one of the preceding claims, wherein the organic reaction solvent comprises at least one of ether, toluene, xylene, benzene, methylene chloride, and hexane.
The process of any one of the preceding claims, wherein the catalyst precursors comprise a Group 15 atom containing ligand compound and a metal containing compound.
The process of any one of the preceding claims, wherein the catalyst precursors further comprise an alkylating agent.
The process of any one of the preceding claims, further comprising:
- combining at least one activator with the catalyst precursors.
The process of any one of the preceding claims, further comprising:
- combining the formed catalyst compound with at least one of a diluent, an activator, a support material, an additional catalyst compound to form a catalyst composition.
The process of any one of the preceding claims, further comprising:
- introducing the catalyst composition and one or more olefin(s) into an operating polymerization reactor.
A process to reuse a solvent in the preparation of a catalyst composition, comprising:
- vaporizing an organic reaction solvent from a catalyst compound formed from catalyst precursors combined in the reaction solvent;
- collecting and condensing the vaporized reaction solvent;
- and
- recycling the reaction solvent to combine with additional catalyst precursors for formation of additional catalyst compound.
Dependencies are inferred from the claim text.