Comparison of extractive distillation and pressure-swing distillation for acetone/chloroform separation
The separation of acetone from chloroform is difficult because the highly nonideal vapor-liquid equilibrium produces a maximum-boiling azeotrope. An earlier paper (Luyben, W. L. (2008). Control of the maximum-boiling acetone/chloroform azeotropic distillation system. Industrial & Engineering Chemistry Research, 47, 6140-6149) discussed the use of extractive distillation for making this separation. This paper studies the use of pressure-swing distillation for making the same separation. Results show that the extractive distillation process is much more attractive from the standpoint of both capital investment and energy consumption. But pressure-swing distillation avoids the potential problem of product contamination by the extractive solvent that must be added to the binary system. (C) 2012 Elsevier Ltd. All rights reserved.
extractive distillation pressure-swing acetone/chloroform azeotrope distillation design