Question: IPA is extracted from the IPA-cyclohexane mixture containing 40% IPA in a countercurrent extraction unit using water. The amount of water in the feed its

IPA is extracted from the IPA-cyclohexane mixture containing 40% IPA in a countercurrent extraction unit using water. The amount of water in the feed its mass ratio to the amount of oil is 5.25 and the balance data are given in the figure below. The ideal number of racks required for the final raffin to contain 20% IPA and the % of the first extract. Determine its composition.

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