Olefin polymerization process using fatty amine additives and boron-modified supported catalyst
AssigneeEquistar Chemicals, LP
InventorShaotian Wang
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Abstract
An olefin polymerization process is described. The process comprises polymerizing an olefin in the presence of a support, a single-site catalyst, an optional activator, and a fatty amine. The support is chemically treated with an organoboron compound. The single-site catalyst contains a polymerization-stable, heteroatomic ligand. The fatty amine is added directly to the reactor. The combination of pre-treating the support with an organoboron compound and the addition of fatty amine to the process unexpectedly increases catalyst activity.
Claims18
A process which comprises polymerizing an olefin in the presence of:
- (a) a silylated support chemically treated with an effective amount of an organoboron compound;
- (b) a single-site catalyst comprising a Group 3-10 transition or lanthanide metal, M, and at least one polymerization-stable heteroatomic ligand;
- (c) an optional activator;
- and
- (d) a fatty amine;
- wherein the fatty amine is added directly to the polymerization reactor.
A process which comprises polymerizing ethylene or a mixture of ethylene and an α-olefin in the presence of:
- (a) a silylated support chemically treated with an effective amount of an organoboron compound;
- (b) a single-site catalyst comprising a Group 4-6 transition metal, M, and at least one boraaryl ligand;
- (c) an optional activator;
- and
- (d) a fatty amine containing at least one C8 or greater hydrocarbyl;
- wherein the fatty amine is added directly to the polymerization reactor.
A process which comprises polymerizing ethylene or a mixture of ethylene and an α-olefin in the presence of:
- (a) a silylated silica chemically treated with an effective amount of an organoboron compound;
- (b) a single-site catalyst comprising a Group 4 transition metal, M, and at least one boraaryl ligand;
- (c) an optional activator;
- and
- (d) from about 5 to about 75 weight %, based on the amount of supported catalyst, of a fatty amine;
- wherein the fatty amine is added directly to the polymerization reactor.
Dependencies are inferred from the claim text.