A feed of one thousand kilograms aqueous solution of pyridine per hour mass) is to be extracted in countercurrent extractor column with pure benzene to reduce the solute content in the raffinate to 2%. Determine the number of ideal stages required if the solvent rate is 850 kg/hr. Raffinate (Aqueous phase) Xa 0.0155 0.017 0.025 0.038 0.06 0.9845 0.9545 0858 0.757 0.679 0.550 0.429 0.225 X 0.0 0.0265 0-117 0.205 0.262 0.328 0340 00212 0.028 0.092 0.145 0.220 0310 Extract (MIBK phase) Ув 0.9788 0.9533 0.857 0.735 0.609 0.472 0.354 200 Yo 0.0 0.0187 0.000 0.173 0.246 0.308 0.336

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