How to use Aspen to separate 86% water, 9% ethanol, and 5% isobutanol
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It seems that extractive distillation is needed, but my simulation always throws errors. Could someone with experience tell me what to do?
Water can form binary azeotropes with ethanol and isobutanol respectively
First, T1 is used to separate some of the water and isobutanol as they come out of the top of the tower; the aqueous phase is sent back to T1, while the organic phase proceeds to T2, where isobutanol is obtained at the bottom of tower T2； Meanwhile, the T1 tower bottom produces a water-ethanol mixture, following the classical ethanol dehydration process parameters for this system.