Determine the effects of entrainment for Example 18-1, Part C, for the following:

Example 18-1

a. Melt of eutectic composition replaced with feed,, \(\mathrm{e}_{\mathrm{v}} \approx 0.30\).

b. Operating temperature is \(33.4^{\circ} \mathrm{C}\) and melt is \(10.0 \mathrm{~mol} \%\) naphthalene, \(\varepsilon=0.10, \mathrm{e}_{\mathrm{v}} \approx\) 0.08 .

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Determine what happens if we start with 1.0 kmol of a 94.2 mol% phenol, 5.8 mol% naphthalene mixture at 50C and cool it slowly. A. At what temperature do crystals first appear? What is the composition of these crystals? B. At what temperature does the entire mass freeze? At a slightly higher temperature, what two phases are in equilibrium, and what are their compositions? C. If feed rate is 100 kmol/h of a 94.2 mol% phenol, 5.8 mol% naphthalene mixture at 50C and we operate at 29.8C, what is the yield of pure phenol? D. If you want to obtain pure naphthalene crystals, what is the minimum naphthalene concentration of the feed? E. If a continuous crystallizer is used with feed = 100 kmol/h of a 60 mol% phenol, 40 mol% naphthalene mixture and we cool to an operating temperature of 40C, what is the liquid concentration, and how many kmol/h of pure naphthalene crystals are formed? F. For part E, what are the advantages of using the eutectic temperature as the operating temperature? G. For part E, what are the advantages and disadvantages of using 50C as the operating temperature? H. Suspension melt crystallization of eutectic systems produces pure crystals with high productivity. Is this the perfect separation method? What, if any, are the problems with suspension melt crystallization?