Polyolefin manufacturing process
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United States of America Patent
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Issued Date -
Jun 23, 2011
app pub date -
Dec 17, 2009
filing date -
Dec 17, 2009
priority date (Note) -
Abandoned
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Abstract
The invention relates to an improved process for manufacturing an olefin polymer composition, in particular polyethylene, that incorporates two elongated tubular closed loop reaction zones (or the so-called “slurry loop” polymerization reactors) and a solids-concentrator in between the two reaction zones, that is optimally controlled to achieve the desired reactor and downstream solid concentrations required to make a range of polymer compositions including “bimodal” polymers where between-reactor hydrogen separation is important.
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