Gas-phase polymerization process with wet zone
US9556291B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Sep 11, 2014 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Sep 11, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/34
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present disclosure is directed to a process for producing olefin-based polymer in a gas phase polymerization reactor. The process includes forming a wet zone in the gas phase polymerization reactor. The wet zone is formed by maintaining a temperature less than or equal to the fluidizing medium dew point temperature+2° C. in a region of the reactor. The region is defined as the region extending from the distributor plate to 2.5 meters above the distributor plate. Injection of a high activity catalyst composition in the wet zone produces olefin-based having a settled bulk density greater than 23.5 lb/ft3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.