Question: Problem 4 (25 PTS). A 3-stage countercurrent leaching unit is used to remove caffeine from coffee beans using octanol as a solvent. In Stage 2,

Problem 4 (25 PTS). A 3-stage countercurrent leaching unit is used

Problem 4 (25 PTS). A 3-stage countercurrent leaching unit is used to remove caffeine from coffee beans using octanol as a solvent. In Stage 2, a portion of the overflow is removed to test the performance of the system. The feed contains 25wt% caffeine and the mass of coffee beans (insoluble, A) in the feed is 600 kg/hr. Pure solvent (2500kg/hr) is used to extract the caffeine. The mass of insoluble solid in the underflow is a factor of 1.84 times the mass of solvent in the underflow. Using the diagram below, calculate the flow rate of caffeine (kg/hr) exiting Stage 1 in the overflow

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