5.1 A feed of 10 000 kg of soybeans is processed in a sequence of three stages. The feed contains 35wt% protein, 27.1wt% carbohydrate, 9.4wt% fiber and ash, 10.5wt% moisture and 18wt% oil. In the first stage, the beans are crushed and pressed to remove oil, giving an expressed oil stream and a stream of pressed beans containing 6wt% oil. Assume no loss of other constituents in the oil stream. In the second stage, the pressed beans are extracted with hexane to produce an extracted meal stream containing 0.5wt% oil and a hexane-oil stream. Assume no hexane in the extracted meal. Finally, in the last stage, the extracted meal is dried to give a dried meal of 8wt% moisture. Calculate the following: a. kg of pressed beans from the first stage b. kg of extracted meal from the second stage c. kg of final dried meal from the third stage

A tubular shell/tube exchanger is operated with the following conditions: "Thermal conductivity of the tube wall, kTw, is 26, btu/hr-ft-F" "Baffle window opening fraction is 0.1955" *** Neglect the viscosity correction" Tube-side Shell-side tube Do, Di, inches 0.75 0.62 34 shell Di, inches passes 4 1 tube length, ft 12 number of tubes 784 tube pitch, in 1 baffle pitch, in 18 bulk fluid temp, F 120 65 fluid flow, lbs/hr 170000 160000 cp, btu/lb-F 1 0.55 spgr 1 1 22

Draw a diagram of the industrial sugar evaporation process in a multiple effect evaporator and explain its operation.

What is the critical solution temperature?