We have \(100 \mathrm{~kg} / \mathrm{h}\) of a feed that is \(60 \mathrm{wt} \%\) methylcyclohexane (A) and \(40 \mathrm{wt} \% \mathrm{n}\)-heptane (D) and \(50 \mathrm{~kg} / \mathrm{h}\) of a feed that is \(20 \mathrm{wt} \%\) methylcyclohexane and \(80 \mathrm{wt} \% \mathrm{n}\)-heptane. These two feeds are mixed with \(200 \mathrm{~kg} / \mathrm{h}\) of pure aniline (S) in a single equilibrium stage. Equilibrium data for extraction of methylcyclohexane (A) from nheptane (D) into aniline (S) are given in Table 13-8.

a. What are extract and raffinate compositions leaving the stage?

b. What is the flow rate of extract product?

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TABLE 13-8. Equilibrium data for methylcyclohexane, n-heptane- aniline Hydrocarbon Phase, wt% Methylcyclohexane n-Heptane Aniline-Rich Phase, wt% Methylcyclohexane n-Heptane XA XD YD 0.0 92.6 0.0 6.2 9.2 83.1 0.8 6.0 18.6 73.4 2.7 5.3 22.0 69.8 3.0 5.1 33.8 57.6 4.6 4.5 40.9 50.4 6.0 4.0 46.0 45.0 7.4 3.6 59.0 30.7 9.2 2.8 67.2 22.8 11.3 2.1 71.6 18.2 12.7 1.6 73.6 16.0 13.1 1.4 3.3 5.4 15.6 0.6 88.1 0.0 16.9 0.0