Consider the benzene recovery column in the toluene hydrodealkylation process shown in Figure 1.5. This column is redrawn in Figure E13.2. The purpose of the column is to separate the benzene product from unreacted toluene, which is recycled to the front end of the process. The desired purity of the benzene product is 99.6 mol%. The feed and the top and bottoms product streams are presented in Table E13.2, which is taken from Table 1.5.

Figure 1.5

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10 mps E-106 T-101 20 42 12 E-104 14 CW 13 V-102 P-102 A/B Figure E13.2 Benzene Column in Toluene Hydrodealkylation Process (from Figure 1.5) 19 15