Method for controlling the polymer flow in a polymerization process
US7405260B2 · kind B2 · utility
2Cited by
1References
10Claims
0Family size
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Key dates
| Filing date | Jan 31, 2005 |
| Grant date | Jul 29, 2008 |
| Priority date | — |
| Expiry date | Jul 19, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/905
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for controlling the flowability of polymer particles flowing downward in a densified form inside a polymerization reactor, in which one or more monomers are gas-phase polymerized in the presence of a polymerization catalyst, the density of solid (Kg of polymer per m3 of reactor occupied by the polymer) being higher than 80% of the “poured bulk density” of the polymer, the method being characterized in that a liquid stream is continuously fed into the polymerization reactor at a mass flow rate per unity of reactor surface higher than 30 Kg/h m2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.