In a homogeneous azeotropic distillation process for the benzene cyclohexane sys

Question

In a homogeneous azeotropic distillation process for the benzene cyclohexane system, one way to recover the entrainer (acetone = A) from the cyclohexane (CH) is by extraction with water (W). Say that a 250 kmol/h of a mixture containing 80 mol% A + 20 mol% CH is fed into an extractor. The raffinate should contain 95 mol% cyclohexane. If 250 kmol/h of water are used in the extractor, how many equilibrium stages would be needed for this extraction? What would be the final extract composition? What was the minimum quantity of water that could have been used to meet the specifications of the problem?

Explanation / Answer

The final extracted composition of water and acetone is about .997%

The combination of water and acetone results in a dangerous way

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