Solution polymerization process with improved energy utilization
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United States of America Patent
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Feb 21, 2017
Grant Date -
Aug 11, 2016
app pub date -
Sep 8, 2014
filing date -
Sep 19, 2013
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Abstract
A solution polymerization process that consumes less energy comprising: injecting feeds into one or more reactors to form a polyethylene in a single liquid phase, or optionally two liquid phases; deactivating the single or dual liquid phase; a first V/L separator separates the deactivated phase into a first bottom stream and a first overhead stream; the first overhead stream passes to a distillation column and the first bottom stream enters a second V/L separator, forming a second overhead stream and a second bottom stream; the second bottom stream enters a third V/L separator, forming a third overhead stream and a third bottom stream; the third bottom stream passes to polymer recovery; the second and third overhead streams are combined, condensed and purified, forming a purified solvent that is recycled to said reactors.
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