Methods for terminating olefin polymerizations
AssigneeChevron Phillips Chemical Company LP
InventorsMax P. McDaniel, Qing Yang, Kathy S. Clear, Tony R. Crain, Timothy O. Odi
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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.
Claims23
A composition for use in an olefin polymerization reactor system, the composition consisting of:
- isobutane;
- and
- a catalyst deactivating agent that is a natural source oil, a siloxane, or a combination thereof.
A composition for use in an olefin polymerization reactor system, the composition consisting of:
- an alkane solvent comprising propane, isobutane, n-butane, n-pentane, isopentane, neopentane, n-hexane, heptane, octane, cyclohexane, cycloheptane, methylcyclohexane, methylcycloheptane, or a mixture thereof;
- and
- a catalyst deactivating agent comprising a siloxane characterized by a viscosity in a range from 2 to 5,000 cSt at 25° C.
A composition for use in an olefin polymerization reactor system, the composition consisting of:
- an alkane solvent having from 3 to 18 carbon atoms;
- and
- a catalyst deactivating agent comprising a polydimethylsiloxane characterized by a viscosity in a range from 2 to 5,000 cSt at 25° C.
Dependencies are inferred from the claim text.