Staged reactor process
US6184299A · kind A · utility
3Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1999 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Mar 31, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process comprising contacting ethylene and at least one alpha-olefin comonomer having with a transition metal based catalyst system in two fluidized bed reactors connected in series, in the gas phase, under polymerization conditions, with the proviso that a hydrocarbyl aluminum cocatalyst is introduced into the first reactor and a different hydrocarbyl aluminum cocatalyst or no cocatalyst is introduced into the second reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.