Methods and devices for polymerization
US8084554B2 · kind B2 · utility
1Cited by
9References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2008 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Sep 19, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of treating a gas phase fluidized bed reactor and a method of polymerizing olefins in a gas phase fluidized bed reactor in the presence of a catalyst prone to cause sheeting by introducing a chromium-containing compound into the reactor and forming a high molecular weight polymer coating on the walls of the reactor. Furthermore, a device for and method of introducing the chromium-containing compound into the fluidized bed reactor at a plurality of locations in proximity to a lower section of a bed section wall of the fluidized bed reactor, and forming a high molecular weight polymer coating on the bed section wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.