Benzene and trimethylamine (TMA) are to be separated in a three-stage liquid-liquid extraction column using water as
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Benzene and trimethylamine (TMA) are to be separated in a three-stage liquid-liquid extraction column using water as the solvent. If the solvent-free extract and raffinate products are to contain, respectively, 70 and 3 wt% TMA, find the original feed composition and the water-to-feed ratio with a right-triangle diagram. There is no reflux and the solvent is pure water. Equilibrium data are asfollows:
Transcribed Image Text:
TRIMETHYLAMINE-WATER-BENZENE ON PHASE BOUNDARY COMPOSITIONS Extract, wt% Raffinate, wt% TMA H;0 Benzene TMA H;0 Benzene 5.0 0.4 94.6 5.0 0.0 95.0 10.0 89.4 0.6 10.0 0.0 90.0 15.0 84.0 1.0 15.0 1.0 84.0 20.0 78.0 2.0 20.0 2.0 78.0 25.0 72.0 3.0 25.0 4.0 71.0 30.0 66.4 3.6 30.0 7.0 63.0 35.0 58.0 7.0 35.0 15.0 50.0 40.0 47.0 13.0 40.0 34.0 26.0 The tie-line data are: Extract, wt% TMA Raffinate, wt% TMA 39.5 31.0 21.5 14.5 13.0 9.0 8.3 6.8 4.0 3.5
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