Question: . Soybean flakes containing 22 wt% oil are to be leached in a countercurrent multistage extraction battery to contain 0.8 kg oil/100 kg inert

. Soybean flakes containing 22 wt% oil are to be leached in

. Soybean flakes containing 22 wt% oil are to be leached in a countercurrent multistage extraction battery to contain 0.8 kg oil/100 kg inert solid using fresh and pure hexane solvent. For every 1000 kg soybeans, 1000 kg of hexane is used. Data for downstrem are given in the table below. oil/ solution (kg/kg) 0 0.2 0.3 solution retained (kg)/inert solid (kg) 0.578 0.658 0.699 a) Calculate the exit flows and compositions. b) Find what % of the oil in the soybean flakes is recovered with the solvent. c) Determine the number of theoritical stages needed.

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