The reduction of extractive agent in extractive distillation and auto-extractive distillation

Nidal Hilal, George Yousef, Paul Langston

Research output: Contribution to journalArticlepeer-review


Methanol-acetone, methanol-methyl acetate and methanol-chloroform were used as binary systems in extractive distillation and water-methanol-acetone, water-methanol-methyl acetate and water-methanol-chloroform were used as ternary systems in auto-extractive distillation, to study the possibility of reducing the specific consumption of extractive agent (q) and therefore, to reduce energy consumption of the separation process. Water was used in both binary and ternary systems as the extractive agent. Increasing the distance between the mixture feed and extractive agent feed along the separation column led to a 35-40% reduction in the specific consumption of extractive agent, while splitting the extractive agent feed into two branches on the column led to a further reduction of 25-30%. Computer simulation with HYSYS supported the conclusions for the binary methanol-acetone system.

Original languageEnglish (US)
Article number4559
Pages (from-to)673-679
Number of pages7
JournalChemical Engineering and Processing
Issue number8
StatePublished - 2002


  • Auto-extractive distillation
  • Azeotropes
  • Extractive distillation

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering


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