In the internal reflux process presented here, the liquid phase
exiting the bottom of the high pressure top separator is entirely
sent to the atmospheric separator, where the distillate (D) is separated
from the residual solvent (P1) and collected. No part of the
distillate is refluxed to the column (L0 = 0). The reflux is internally
generated by a temperature gradient inside the column, characterized
by an increase of temperature at the first stage. Due to the
solubility decrease with temperature, in the range of pressure of
interest, part of the esters recondense because of the temperature
gradient, providing an internal reflux to the column.
In the internal reflux process presented here, the liquid phaseexiting the bottom of the high pressure top separator is entirelysent to the atmospheric separator, where the distillate (D) is separatedfrom the residual solvent (P1) and collected. No part of thedistillate is refluxed to the column (L0 = 0). The reflux is internallygenerated by a temperature gradient inside the column, characterizedby an increase of temperature at the first stage. Due to thesolubility decrease with temperature, in the range of pressure ofinterest, part of the esters recondense because of the temperaturegradient, providing an internal reflux to the column.
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