Question: Propionic acid will be extracted from a feed of 30 wt.% propionic acid and 70 wt.% water at 30C, using pure o-xylene as solvent, in

Propionic acid will be extracted from a feed of 30 wt.% propionic acid and 70 wt.% water at 30C, using pure o-xylene as solvent, in a countercurrent liquid-liquid extraction column. The final refining will contain 5 wt.% propionic acid on a solvent-free basis. Determine the minimum and maximum solvent-to-feed ratio.

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