A new algorithm for the determination of product sequences in azeotropic batch distillation

Laszlo Hegely, P. Láng

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In multicomponent azeotropic mixtures (e.g., waste solvents), the products obtainable by batch distillation and their maximal amount is highly dependent on the charge composition. A method is presented for the determination of product sequences for any number of components based only on the temperatures of pure components and azeotropes, and azeotropic compositions, without the knowledge of further VLE data. The method is suitable for heteroazeotropes and for taking pressure change into consideration, as well. The stability of fixed points is determined with the assumption that Serafimov topological class of the mixture occurs in Reshetov's statistics. On the basis of the stabilities, we enumerate all feasible product sequences using the algorithm of [Ahmad, B. S.; Zhang, Y.; Barton, P. I. Product Sequences in Azeotropic Batch Distillation. AIChE Journal1998, 44, 5, 1051-1070.]. Finally, the relative amount of cuts are determined assuming maximal separation for the given charge composition. The results are presented for the systems acetone-chloroform-methanol-ethanol- benzene and methanol-tetrahydrofuran-ethyl acetate-ethanol-isopropyl alcohol-water.

Original languageEnglish
Pages (from-to)12757-12766
Number of pages10
JournalIndustrial and Engineering Chemistry Research
Volume50
Issue number22
DOIs
Publication statusPublished - Nov 16 2011

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Distillation
Methanol
Ethanol
Chemical analysis
Azeotropes
2-Propanol
Chloroform
Chlorine compounds
Acetone
Benzene
Alcohols
Statistics
Water
Temperature
tetrahydrofuran
ethyl acetate

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

Cite this

A new algorithm for the determination of product sequences in azeotropic batch distillation. / Hegely, Laszlo; Láng, P.

In: Industrial and Engineering Chemistry Research, Vol. 50, No. 22, 16.11.2011, p. 12757-12766.

Research output: Contribution to journalArticle

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