In the present work, the continuous countercurrent separation
of FOEE using SCCO2 is studied modelling a process which exploits
retrograde condensation to generate an internal reflux in the column.
In particular, the reflux for the enriching section is generated
operating the top stage at a temperature (T1) higher than the
temperature of the body of the column (T), which is isothermal.
The relationship between the main process parameters, such as
S/F, N, T and T1, is investigated, allowing a quantitative comparison
with the external reflux process.