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I am using an extractive distillation column to seperate ethanol and ethylene glycol. I am trying to find Rmin however its proving difficult as the the top operating line, q-line and bottom operating line do not to intercept the VLE curve. I have to use McCabe-Thiele for this before I can proceed onto using Aspen HYSYS. Please help in working out Rmin, thank youenter image description here

John Knowles
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extend your q line to equilibrium curve and draw stripping and distillation column line through intersection of q line and equilibrium curve you will get Rmin

Siddhant Sinha
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