Method of preparing metallocene catalyst for polyolefin preparation
US11077434B2 · kind B2 · utility
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Key dates
| Filing date | Jul 7, 2017 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Aug 29, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2420/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of preparing a high-purity metallocene catalyst capable of providing various selectivities and high activities for polyolefin copolymers, wherein a metallocene compound is formed by reacting a ligand compound with a zirconium compound, and then lithium chloride as a reaction by-product included in the metallocene compound is prepared in a form of a complex compound and effectively removed in a subsequent step of extracting the catalyst, thereby effectively preparing the high-purity metallocene catalyst, is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.