Crossing of valleys, ridges, and simple boundaries by distillation in homogeneous ternary mixtures

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Abstract

Residue curves, simple distillation boundaries, and rectification column liquid composition profiles in several example ternary mixtures are calculated and plotted, and afterward the empirical results are theoretically discussed. Valleys and ridges are not the boundaries to simple distillation residue curves. Valleys and ridges run along paths different from the residue curve trajectories. Valley floors and top-ridge lines are frequently crossed by residue curves. The simple distillation boundaries are crossed to a small extent by single-feed rectification profiles, but this crossing is not significant in the sense that another boundary to rectification profiles exists not far from the simple distillation boundary. Significant crossing, i.e., elimination of the boundary by rectification, is not theoretically excluded, and eight maps providing such an opportunity are listed. However, this phenomenon must be rather rare in practice because of chemical reasons; therefore, excluding them is a reasonable working hypothesis. Construction of a scalar potential over the tie-line vector field is impossible.

Original languageEnglish
Pages (from-to)893-901
Number of pages9
JournalIndustrial and Engineering Chemistry Research
Volume31
Issue number3
Publication statusPublished - Mar 1992

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distillation
Distillation
valley
Distillation columns
Trajectories
Liquids
Chemical analysis
trajectory
liquid

ASJC Scopus subject areas

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

Cite this

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abstract = "Residue curves, simple distillation boundaries, and rectification column liquid composition profiles in several example ternary mixtures are calculated and plotted, and afterward the empirical results are theoretically discussed. Valleys and ridges are not the boundaries to simple distillation residue curves. Valleys and ridges run along paths different from the residue curve trajectories. Valley floors and top-ridge lines are frequently crossed by residue curves. The simple distillation boundaries are crossed to a small extent by single-feed rectification profiles, but this crossing is not significant in the sense that another boundary to rectification profiles exists not far from the simple distillation boundary. Significant crossing, i.e., elimination of the boundary by rectification, is not theoretically excluded, and eight maps providing such an opportunity are listed. However, this phenomenon must be rather rare in practice because of chemical reasons; therefore, excluding them is a reasonable working hypothesis. Construction of a scalar potential over the tie-line vector field is impossible.",
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