A feed mixture containing 50 wt n heptane and 50 wt methylcyclohexane (MCH) is to be separated by liquid liquid extraction into one product containing 92 5 wt methylcyclohexane and another containing 7 5 wt methylcyclohexane, both on a solvent free basis Aniline will be used as the solvent Using the equilibrium data given below and the graphical method of Maloney and Schubert (a) What is the minimum number of theoretical stages necessary to effect this separation (b) What is the minimum extract reflux ratio (c) If the reflux ratio is 7 0, how many theoretical contacts arerequired LIQUID LIQUID EQUILIBRIUM DATA FOR THE SYSTEM n HEPTANE METHYLCYCLOHEXANE ANILINE AT 25 CAND AT I ATM (101 kPa) Solvent Layer Hydrocarbon Layer Pounds Weight Percent Pounds Weight Percent Aniline Pound Aniline , Solvent Pound , Solvent Solvent Solvent Free Mixture Free Mixture Free Basis Free Basis 0 0799 0 0 0 0 15 12 13 72 0 0836 I1 8 9 9 20 2 0 087 33 8 11 5 11 34 0 0894 37 0 23 9 0 094 50 6 9 98 36 9 0 0952 60 0 9 0 44 5 0 0989 0 1062 67 3 8 09 50 5 76 7 6,83 66 0 74 6 0 1111 84 3 6 45 6 0 0 1135 88 8 79 7 90 4 5 9 82 1 0 116 0 1272 0 135 96 2 5 17 93 9 100 0 4 92 100 0

Question: A feed mixture containing 50 wt% n-heptane and 50 wt% methylcyclohexane (MCH) is to be separated by liquid-liquid extraction into one product containing 92.5 wt%

A feed mixture containing 50 wt% n-heptane and 50 wt% methylcyclohexane (MCH) is to be separated by liquid-liquid extraction into one product containing 92.5 wt% methylcyclohexane and another containing 7.5 wt% methylcyclohexane, both on a solvent-free basis. Aniline will be used as the solvent. Using the equilibrium data given below and the graphical method of Maloney and Schubert:

(a) What is the minimum number of theoretical stages necessary to effect this separation?

(b) What is the minimum extract reflux ratio?

LIQUID-LIQUID EQUILIBRIUM DATA FOR THE SYSTEM n-HEPTANE/METHYLCYCLOHEXANE/ ANILINE AT 25"CAND AT I

LIQUID-LIQUID EQUILIBRIUM DATA FOR THE SYSTEM n-HEPTANE/METHYLCYCLOHEXANE/ ANILINE AT 25"CAND AT I ATM (101 kPa) Solvent Layer Hydrocarbon Layer Pounds Weight Percent Pounds Weight Percent Aniline/ Pound Aniline/ , Solvent- Pound , Solvent- Solvent- Solvent- Free Mixture Free Mixture Free Basis Free Basis 0.0799 0.0 0.0 15.12 13.72 0.0836 I1.8 9.9 20.2 0.087 33.8 11.5 11.34 0.0894 37.0 23.9 0.094 50.6 9.98 36.9 0.0952 60.0 9.0 44.5 0.0989 0.1062 67.3 8.09 50.5 76.7 6,83 66.0 74.6 0.1111 84.3 6.45 6.0 0.1135 88.8 79.7 90.4 5.9 82.1 0.116 0.1272 0.135 96.2 5.17 93.9 100.0 4.92 100.0

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Subject Liquidliquid extraction of methylcyclohexane A from a mixture with nheptane C by aniline S as the solvent using extract reflux Given Feed of 50 wt C and 50 wt A Extract to contain 925 wt A in ... View full answer

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