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In the manufacture of methyl ethyl ketone from butanol the product is separatedfrom unreacted butanol by distillation The feed to the column consists of amixture of 0 90 mol fraction MEK 0.10 mol

In the manufacture of methyl ethyl ketone from butanol, the product is separatedfrom unreacted butanol by distillation. The feed to the column consists of amixture of 0.90 mol fraction MEK, 0.10 mol fraction 2-butanol, with a trace oftrichloroethane.The feed rate to the column is 20 kmol/h and the feed temperature 35 ŽC. Thespecifications required are: top product 0.99 mol fraction MEK; bottom product0.99 mol fraction butanol.Design a column for this separation. The column will operate at essentiallyatmospheric pressure. Use a reflux ratio 1.5 times the minimum.(a) determine the minimum reflux ratio,(b) determine the number of theoretical stages,(c) estimate the stage efficiency,(d) determine the number of actual stages needed,(e) design a suitable sieve plate for conditions below the feed point.Equilibrium data for the system MEK 2-butanol, mol fractions MEK:liquidphase 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9vapourphase 0.23 0.41 0.53 0.64 0.73 0.80 0.86 0.91 0.95boilingpoint ŽC 97 94 92 90 87 85 84 82 80

Jun 09 2020 Read more Less More

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