Method for polymerizing olefins in a gas phase reactor using a seedbed during start-up
AssigneeChevron Phillips Chemical Company LP
InventorBenjamin M. Shaw
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Abstract
A method of starting up a gas phase polymerization reactor, comprising controlling an amount of hydrocarbon absorbed in a polymer seedbed during startup to avoid formation of agglomerates or sheeting on an interior wall of the reactor. A system for of starting up a gas phase polymerization reactor, comprising a controller coupled to the polymerization reactor and controlling an amount of hydrocarbon absorbed in a polymer seedbed during startup to avoid formation of agglomerates or sheeting on an interior wall of the reactor.
Claims20
A method for startup of a gas phase polymerization reactor, wherein startup comprises the time prior to reaching target reaction conditions, the method comprising:
- beginning the startup at initial operating parameters, and
- controlling an amount of polymerizable hydrocarbon absorbed in a polymer seedbed during startup such that the amount is less than a critical amount of hydrocarbon, whereby an undesirable degree of agglomeration or sheeting on an interior wall of the reactor is avoided during startup.
Dependencies are inferred from the claim text.