A continuous countercurrent multistage system is to be used to leach oil from meal by benzene solvent. The process is to

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A Continuous Countercurrent Multistage System Is To Be Used To Leach Oil From Meal By Benzene Solvent The Process Is To 1 (43.4 KiB) Viewed 63 times

A continuous countercurrent multistage system is to be used to leach oil from meal by benzene solvent. The process is to treat 1400 kg/h of inert solid (B) containing 500 kg oil (A) and also 100 kg benzene (C). The inlet flow per hour of fresh solvent mixture contains 1250 kg benzene and 35 kg oil. The leached solids are to contain 35 kg oil. Settling experiments similar to those in the actual extractor show that the solution retained depends upon the concentration of oil in the solution. The data are tabulated below as N kg inert solid B/kg solution and ya kg oil A/kg solution. N YA N YA 2.00 1.98 1.94 1.89 0 0.1 0.2 0.3 1.82 1.75 1.68 1.61 0.4 0.5 0.6 0.7 Calculate the amounts and concentrations of the stream leaving the process and the number of stages required.