Steady State Design for the Separation of Acetone-Chloroform Maximum Boiling Azeotrope Using Three Different Solvents
Korean Chem. Eng. Res., 55(4), 490-496 (2017) https://doi.org/10.9713/kcer.2017.55.4.490 PISSN 0304-128X, EISSN 2233-9558 Steady State Design for the Separation of Acetone-Chloroform Maximum Boiling Azeotrope Using Three Different Solvents Manish Pokhrel, Asante Daniel Owusu, and Jungho Cho† Department of Chemical Engineering, Kongju National University, 1223-24, Cheonan-daero, Seobuk-gu, Cheonan, Chungnam, 31080, Korea (Received 26 October 2016; Received in revised form 30 March 2017; accepted 31 March 2017) Abstract − We have designed an extractive distillation for separating maximum boiling azeotrope of acetone-chloro- form system. PRO/II 9.4 was used to simulate the overall process. The VLE data adopted from Dortmund data bank was regressed to obtain a new set of binary interaction parameters. Three different entrainers were used for the separation process--dimethyl sulfoxide (DMSO), ethylene glycol (EG) and benzene--to test their viability for the acetone-chloro- form system. Thermodynamic feasibility analysis was done through ternary map diagrams. Two different thermody- namic models, NRTL and UNIQUAC, were explored for the study of overall process. Key words: Extractive distillation, Maximum boiling azeotrope, Relative volatility, Residue curve map, Distillation boundary 1. Introduction that pressure swing distillation is unattractive for the separation of acetone-chloroform system since its composition is not sensitive to The distillation process is based on the difference in the volatil- pressure changes [6]. ity of the components to be separated. However, for mixtures where azeotropes are present, conventional distillation have shown to be 2. Problem design and specification unable to effect the separation desired [1].
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