Final purification stage in the preparation of a pharmaceutical product A from natural sources requires centrifuging and continuous filtration as depicted in the figure below. Determine the flow rate of the recycle stream in kg/h. Feed, 100 kg/h (20% A in water) Recycle, 0.5 kg of A/kg of water Centrifuge Water 65% A, 35% water Filter Product, 93% A, 7% water

A wet paper pulp is found to contain 70% water. 61% of the original water was removed by drying. What is the concentration of water in the dried paper pulp? (use as the basis, 1 pound of wet pulp).

A double effect evaporator is used to concentrate an 18% CuSO4 solution. At the end of evaporation, 26,000 kg/h of 50% CuSO4 solution were obtained. If the water evaporated in the second effect is half the water evaporated in the first effect, determine: a) The amount of solution fed into the first effect. b) The amount of water evaporated in the first and second effect. c) The amount of solution fed into the second effect, as well as its composition. Problem diagram 18% CuSO4 82% H₂O M₁ M₂ M3 X CuSO4 Y H₂O A 2 M4 = 0.5 M₂ M5 H₂O steam M6 M2 M6 is the water that condenses 26 000 kg/hr 50% CuSO4 50% H2₂O

An evaporation-crystallization process is used to obtain solid potassium sulfate from an aqueous solution of this salt. The fresh feed to the process contains 19.6% by mass K2SO4. The filter cake consists of solid K2SO4 crystals and a 40.0% by mass K2SO4 solution, in a ratio of 10 kg crystals/kg solution. The filtrate, also a 40.0% solution, is recycled to join the fresh feed. Of the water fed to the evaporator, 45.0% is evaporated. The evaporator has a maximum capacity of 175 kg of water evaporated per second.(a) Consider that the process operates at its maximum capacity. Draw and label the flow diagram and perform the degree of freedom analysis for the overall system, the fresh feed-recycle mixing point, the evaporator, and the crystallizer. Then, write in an efficient order (minimizing simultaneous equations) the equations you would use to solve for the unknowns. In each equation, indicate the variable to be determined, but do not perform the calculations yet.(b) Calculate the…