Gas phase olefin polymerizations using dual donor catalyst systems
US6900281B2 · kind B2 · utility
25Cited by
2References
20Claims
0Family size
Inventors
Key dates
| Filing date | Dec 19, 2002 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | Dec 19, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A gas-phase olefin polymerization process in a plug flow reactor uses a catalyst system containing a magnesium halide supported titanium-containing component, an organoaluminum component, and at least one external electron donor component; in the process a first external donor component is added to the reactor at an injection point axially near an injection point for the supported transition metal containing component, and at least a second external donor component is added to the reactor axially downstream from the injection point for the first external donor component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.