Process for polymerizing olefins in the gas-phase
US11078307B1 · kind B1 · utility
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20Claims
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Key dates
| Filing date | Feb 4, 2019 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Feb 4, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/062
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A gas-phase polymerization reactor for the gas-phase polymerization of olefins including a polymerization zone having a recycle line for (a) withdrawing reaction gas from the reactor, (b) leading the reaction gas through a heat-exchanger for cooling, and (c) feeding the reaction gas back to the reactor, wherein the recycle line has the heat-exchanger, a centrifugal compressor having variable guide vanes, and a butterfly valve, and a related process for preparing an olefin polymer in the gas-phase polymerization reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.