Propylene polymerization process with enhanced catalyst activity
US6630544B1 · kind B1 · utility
7Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2002 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | Apr 18, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F110/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for polymerizing propylene is disclosed. The process involves charging propylene and about 90 to 99% of an organoaluminum cocatalyst to a reactor and heating this mixture to at least about 50° C. This is followed by addition of a premix of 1 to 10% of the organoaluminum cocatalyst with a magnesium halide-supported Ziegler-Natta catalyst. The temperature of the reaction mixture is maintained to produce a propylene polymer. The process gives improved catalyst activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.