Catalyst composition and olefin polymerization using same
AssigneeChevron Phillips Chemical Company LP
InventorsBrooke L. Small, Angel Jose Marcucci
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Abstract
Novel metal complexes, particularly chromium complexes, which contain at least one tridentate ligand are disclosed and prepared. Olefins, particularly ethylene, can be reacted to form butene and/or other homo- or co-oligomers and/or polymers with high α-olefin concentrations by contacting a metal catalyst which contains a transition metal, particularly chromium, complexes having per metal atom at least one tridentate ligand with N, O, or N and O coordinating sites.
Claims36
A polymerization process for making a product, the polymerization process comprises contacting at least one olefin in a feed, with or without a medium, with a catalyst and a co-catalyst, followed by recovering the product, wherein the catalyst comprises a metal-tridentate ligand complex comprising a transition metal, a tridentate ligand having at least two different elements for the three coordinating sites in the tridentate ligand, the elements are selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur, and wherein the metal-tridentate ligand complex has a formula as FORMULA B.
A metal-tridentate ligand complex comprising a structure of FORMULA B.
A catalyst system for polymerizing at least one olefin to form a product, the catalyst system comprises a metal-tridentate ligand complex having FORMULA B, and a co-catalyst consisting essentially of at least one organometallic compound.
An ethylene dimerization process comprising
- contacting ethylene in a feed with a catalyst and a co-catalyst under conditions effective to produce butene;
- and
- recovering butene,
- wherein the catalyst comprises a metal-tridentate ligand complex comprising a transition metal, a tridentate ligand having nitrogen for all its three coordinating sites, and the metal-tridentate ligand complex has a formula as FORMULA B.
A polymeric product, wherein
- the polymeric product is produced by contacting a feed comprising at least one α-olefin with a catalyst and co-catalyst with or without a medium;
- the polymeric product is characterized by having a Schulz-Flory constant (K) in the range of from about 0.5 to about 0.9;
- the catalyst comprises a metal-tridentate ligand complex comprising a transition metal, a tridentate ligand having at least two different elements for the three coordinating sites in the tridentate ligand, the elements are selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur, and wherein the metal-tridentate ligand complex has a formula as FORMULA B;
- and
- the co-catalyst comprises at least one organometallic compound selected from the group consisting of organoaluminum compound, organoboron compound, organogallium compound, organozinc compound, organocadmium compound, organotin compound, organolithium compound, organosodium compound, organopotassium compound, organorubidium compound, organomagnesium compound, organocalcium compound, and mixtures thereof.
A polymerization process for making a product, the polymerization process comprises contacting at least one olefin selected from ethylene, propylene and mixtures thereof in a feed with a multi-component catalyst system and at least one co-catalyst, followed by recovering the product, wherein the multi-component catalyst system comprises
- (a) at least one first component consisting essentially of an olefin dimerization or trimerization catalyst comprising a first metal-tridentate ligand complex, wherein the complex comprises a first transition metal, a tridentate ligand having nitrogen for all three coordinating sites in the tridentate ligand, and wherein the metal-tridentate ligand complex has a formula as FORMULA B;
- and
- (b) at least one second component having a second transition metal selected from the group consisting of a Ziegler-Natta catalyst, a precursor of the Ziegler-Natta catalyst, a metallocene, a precursor of the metallocene, a second metal-tridentate ligand complex wherein not all three coordinating sites are the same, and mixtures thereof.
A multi-component catalyst system comprising:
- (a) at least one first component consisting essentially an ethylene or propylene dimerization or trimerization catalyst comprising a metal-tridentate ligand complex, wherein the complex comprises a first transition metal, a tridentate ligand having nitrogen for all three coordinating sites in the tridentate ligand, and wherein the metal-tridentate ligand complex has a formula as FORMULA B;
- and
- (b) at least one second component having a second transition metal selected from the group consisting of a Ziegler-Natta catalyst, a precursor of the Ziegler-Natta catalyst, a metallocene, a precursor of the metallocene, a second metal-tridentate ligand complex wherein not all three coordinating sites are the same, and mixtures thereof.
Dependencies are inferred from the claim text.