Supported olefin polymerization catalyst
US7273912B2 · kind B2 · utility
7Cited by
11References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2003 |
| Grant date | Sep 25, 2007 |
| Priority date | — |
| Expiry date | Dec 3, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/6592
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Supported catalyst systems are provided comprising (a) a transition metal compound, (b) a non aluminoxane activator comprising, and (c) a support material comprising an inorganic metal oxide, inorganic metal halide or polymeric material or mixtures thereof characterised in that the support material has been pretreated with an SO4 containing compound. The preferred transition metal compounds are metallocenes and the SO4 containing compound is typically sulphuric acid. The supported catalyst systems show improved activity and also may reduce fouling in gas phase fluidised bed processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.