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US 10,870,094 B2Granted
Methods for determining transition metal compound concentrations in multicomponent liquid systems
AssigneeChevron Phillips Chemical Company LP
InventorsRichard M. Buck, Qing Yang
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Abstract
Methods for simultaneously determining the concentrations of transition metal compounds in solutions containing two or more transition metal compounds are described. Polymerization reactor systems providing real-time monitoring and control of the concentrations of the transition metal components of a multicomponent catalyst system are disclosed, as well as methods for operating such polymerization reactor systems.
Claims20
A polymerization reactor system comprising:
- (A) a reactor configured to contact a catalyst system with an olefin monomer and an optional olefin comonomer under polymerization reaction conditions to produce an olefin polymer;
- (B) a catalyst preparation vessel configured to contact a first transition metal compound, a second transition metal compound, an activator, and an optional co-catalyst to form the catalyst system;
- and
- (C) an analytical system configured to determine a first concentration of the first transition metal compound and a second concentration of the second transition metal compound in a solution comprising the first transition metal compound and the second transition metal compound present within the polymerization reactor system;
- wherein:
- the polymerization reactor system comprises a slurry reactor, a gas-phase reactor, a solution reactor, or a combination thereof.
3 more elements
A polymerization reactor system comprising:
- (A) a loop slurry reactor configured to contact a catalyst system with ethylene and an optional olefin comonomer under polymerization reaction conditions to produce an ethylene polymer;
- (B) a catalyst preparation vessel configured to contact a first transition metal compound, a second transition metal compound, an activator, and an optional co-catalyst to form the catalyst system;
- and
- (C) an analytical system configured to determine a first concentration of the first transition metal compound and a second concentration of the second transition metal compound in a solution comprising the first transition metal compound and the second transition metal compound present within the polymerization reactor system.
1 more element
Dependencies are inferred from the claim text.