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US 8,940,844 B2Granted
Methods for terminating olefin polymerizations
AssigneeChevron Phillips Chemical Company LP
InventorsQing Yang, Max P. McDaniel, Tony R. Crain, Kathy S. Collins
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Abstract
Catalyst deactivating agents and compositions containing catalyst deactivating agents are disclosed. These catalyst deactivating agents can be used in methods of controlling polymerization reactions, methods of terminating polymerization reactions, methods of operating polymerization reactors, and methods of transitioning between catalyst systems.
Claims5
A composition consisting of:
- isobutane;
- and
- a catalyst deactivating agent comprising a compound having formula (II):
- R1—O—R3—O—R2 (II);
- wherein:
- R1 and R2 independently are a C1 to C18 hydrocarbyl group;
- and
- R3 is
- wherein R4 is a C1 to C10 hydrocarbyl group.
6 more elements
Dependencies are inferred from the claim text.