Asymmetric catalysts
US-9221744-B2 · Dec 29, 2015 · US
Heterobimetallic catalysts and site-differentiated ligands for preparation thereof
US11712686B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11712686-B2 |
| Application number | US-202217681073-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 25, 2022 |
| Priority date | Jul 3, 2018 |
| Publication date | Aug 1, 2023 |
| Grant date | Aug 1, 2023 |
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Abstract
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Phosphine phosphonate and phenoxyphosphine ligands bearing polyethylene glycol (PEG) chains are used as described herein to produce heterobimetallic catalysts. The ligands can be metallated selectively with palladium or nickel and secondary metal ions to provide well-defined heterobimetallic compounds. These heterobimetallic complexes exhibit accelerated reaction rates and greater thermal stability in olefin polymerization compared to other catalysts.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for catalyzing copolymerization of ethylene and polar olefins, comprising: combining ethylene and polar olefins with a heterobimetallic catalyst, wherein the heterobimetallic catalyst has a structure of: wherein A is Pd or Ni, Ph is a phenyl group, PMe 3 is trimethylphosphine, and M is Li, Na, or K, whereby the ethylene and polar olefins undergo copolymerization.
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Classifications
- B01J31/2243Primary
At least one oxygen and one nitrogen atom present as complexing atoms in an at least bidentate or bridging ligand · CPC title
- B01J31/2247Primary
At least one oxygen and one phosphorous atom present as complexing atoms in an at least bidentate or bridging ligand · CPC title
PO · CPC title
Ethene · CPC title
Bi- or polynuclear complexes, i.e. comprising two or more metal coordination centres, without metal-metal bonds, e.g. Cp(Lx)Zr-imidazole-Zr(Lx)Cp · CPC title
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- What does patent US11712686B2 cover?
- Phosphine phosphonate and phenoxyphosphine ligands bearing polyethylene glycol (PEG) chains are used as described herein to produce heterobimetallic catalysts. The ligands can be metallated selectively with palladium or nickel and secondary metal ions to provide well-defined heterobimetallic compounds. These heterobimetallic complexes exhibit accelerated reaction rates and greater thermal stabi…
- Who is the assignee on this patent?
- Univ Houston System
- What technology area does this patent fall under?
- Primary CPC classification B01J31/2243. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 01 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).