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US 2015/0087793 A1Published application
System and method for deterring fouling in a polymerization reactor
AssigneeChevron Phillips Chemical Company LP
InventorsAlbert P. Masino, Randall S. Muninger, Max P. McDaniel, Eric D. Schwerdtfeger, Qing Yang, Graham R. Lief
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Abstract
A catalyst composition may include a precontacted mixture of an olefin polymerization catalyst and an agent including an ammonium salt. The catalyst activity of the catalyst composition in the presence of water may be greater than if no ammonium salt were present in the catalyst composition. The ammonium salt may include a tetraalkylammonium salt, and the olefin polymerization catalyst may include a metallocene compound.
Claims24
A method, comprising:
- introducing a catalyst composition formed within a precontactor into a polymerization zone of a polymerization reactor;
- and
- polymerizing, within the polymerization zone, an olefin monomer using the catalyst composition to produce a polyolefin polymer;
- and
- wherein the catalyst composition formed within the precontactor comprises a contact product of contact components comprising:
- an olefin polymerization catalyst;
- and
- an agent comprising an ammonium salt, wherein the catalyst composition has a greater catalyst activity in the presence of water than if no ammonium salt were present.
5 more elements
A catalyst composition, comprising:
- a contact product produced from contact components, comprising:
- an olefin polymerization catalyst;
- and
- an ammonium salt having the formula:
- (R1)(R2)(R3)(R4)N(X), wherein:
- N is Nitrogen;
- R1, R2, R3, and R4 are independently selected from a hydrogen, an aliphatic group having from 1 to 20 carbons, or an aryl group having from 1 to 20 carbons;
- and
- X is an anion.
6 more elements
A system, comprising:
- a polymerization reactor comprising an olefin monomer, a catalyst composition, and a diluent, wherein the polymerization reactor subjects the olefin monomer to polymerization conditions in the presence of the catalyst composition to produce a polyolefin;
- a precontactor coupled to an inlet of the polymerization reactor, wherein the precontactor comprises contact components that form the catalyst composition, the contact components comprising:
- an olefin polymerization catalyst;
- and
- an agent comprising an ammonium salt such that the catalyst composition has a greater catalyst activity in the presence of water than if no ammonium salt were present.
2 more elements
Dependencies are inferred from the claim text.