Process for thermal separation of a solution
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United States of America Patent
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Nov 1, 2016
Grant Date -
Oct 22, 2015
app pub date -
Jul 1, 2015
filing date -
Jun 30, 2010
priority date (Note) -
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Abstract
A process for thermal separation of a solution comprised of a thermoplastic polymer and a solvent involves heating a solvent under pressure above a critical point of the solvent; decompressing the heated solvent in a first vessel, such that a polymer-rich and a low-polymer phase form; and supplying the polymer-rich phase to a second vessel. In embodiments, on entry into the second vessel, a pressure jump occurs, the pressure jump leading to a thermal flash in the second vessel such that a polymer part of the polymer-rich phase rises to at least 70%, and a resulting polymer-rich solution is provided.
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