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Unformatted text preview: reboiler increases the distance between the equilibrium curve and the operating lines for Sections 2 and 3 so that the steps in Sections 2 and 3 accomplish larger composition changes. Exercise 7.38 (continued)
Analysis: Addition (continued) Exercise 7.39
Subject: Distillation of a mixture of paradichlorobenzene (P) and orthodichlorobenzene (O), two closeboiling isomers, using the McCabeThiele diagram, with the Kremser equation to accurately calculate the separations at the two ends of the column. Given: Feed of 62 mol% P and 38 mol% O that is slightly vaporized with q = 0.9. Distillate is liquid of 98 mol% P. Bottoms is 96 mol% O. Pressures at top and bottom are 20 psia and 15 psia, respectively. Reflux ratio, R = 1.15 times minimum. Assumptions: Constant molar overflow. Total condenser and partial reboiler. Average relative volatility based on Raoult's law. Find: Number of theoretical stages from McCabeThiele diagram, using Kremser supplement for the two ends of the column. Analysis: From a simulation program or handbook, the temperatures at the top and...
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This note was uploaded on 09/08/2008 for the course CHE 244 taught by Professor Selebi during the Spring '06 term at Lehigh University .
 Spring '06
 selebi
 Distillation, pH, Mass Transfer

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