Answers to Selected Odd-Numbered Exercises in
“Separation Process Principles” by
J. D. Seader and Ernest J. Henley
Chapter 13
13.1 (a) 0.0102 mole fraction nC7 in residue
0.0324 mole fraction nC7 in distillate
(b) 0.0365 mass fraction nC7 in distillate
0.0142 mole fraction nC7 in residue
30 wt% distilled 13.5
Case 1 Case 2 Case 3
(a) Moles distillate/
mole feed 0.726 0.4 0.513
(b) Mole fraction benzene in distillate
0.70 0.75 0.738
Mole fraction benzene in residue
0.33 0.50 0.455
13.11 0.53 kmol distilled
