Process for the gas phase polymerization of olefins
US6372867B1 · kind B1 · utility
9Cited by
2References
7Claims
0Family size
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Key dates
| Filing date | Mar 10, 2000 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Mar 10, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/901
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved chromium oxide-based catalyst supported on a granular or microspherical refractory oxide for the gas phase polymerization of at least one alpha olefin containing from 2 to 12 carbon atoms, wherein the supported chromium oxide-based catalyst has been subjected to a sole calcination/activation step consisting of a single thermal treatment performed at a temperature ranging from 200° to 450° C. under an oxygen containing atmosphere, and an olefin polymerization process employing such catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.