Separation of a minimum-boiling azeotrope in a batch extractive rectifier with an intermediate-boiling entrainer

E. Rév, Z. Lelkés, Viktória Varga, Csaba Stéger, Z. Fonyó

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The separation of minimum-boiling azeotropes is feasible using batch extractive distillation (BED) in a rectifying column with an intermediate-boiling entrainer. The main difference between BED and solvent-enhanced batch distillation (SBD) is the application of continuous entrainer feeding either to the column or to the still. Our test mixture, selected according to didactic viewpoints, is methyl acetate and cyclohexane with carbon tetrachloride. Operation steps (sequencing), limiting flows, and limiting numbers of stages are determined by a feasibility study based on profile maps; the design is validated by rigorous simulation. Results of parametric studies and a comparison of SBD and BED in terms of effectiveness are presented. The studied parameters are the numbers of stages, the reflux ratio, the feed ratio, and the column hold-up. The separation of minimum-boiling azeotropes in SBD with an intermediate-boiling entrainer is practically infeasible. The application of continuous feeding (characteristic of BED) makes the process feasible. Our test entrainer is thermodynamically rather well behaved.

Original languageEnglish
Pages (from-to)162-174
Number of pages13
JournalIndustrial and Engineering Chemistry Research
Volume42
Issue number1
Publication statusPublished - Jan 8 2003

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Azeotropes
distillation
Distillation
Boiling liquids
Carbon tetrachloride
Carbon Tetrachloride
Distillation columns
Cyclohexane
feasibility study
acetate
carbon

ASJC Scopus subject areas

  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

Cite this

Separation of a minimum-boiling azeotrope in a batch extractive rectifier with an intermediate-boiling entrainer. / Rév, E.; Lelkés, Z.; Varga, Viktória; Stéger, Csaba; Fonyó, Z.

In: Industrial and Engineering Chemistry Research, Vol. 42, No. 1, 08.01.2003, p. 162-174.

Research output: Contribution to journalArticle

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