Separation of the benzene/cyclohexane mixture by stripping crystallization

Lie Ding Shiau*, Chia Chen Yu

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

22 Scopus citations

Abstract

Stripping crystallization (SC), also called distillative freezing (DF), is introduced to separate the benzene (Bz)/cyclohexane (Cx) mixture. In principle, SC is operated at a triple-point condition, in which the liquid mixture is simultaneously vaporized and crystallized due to the three-phase equilibrium. Thus, SC combines distillation and crystallization to produce pure crystals. The experiments show that three SC operations are required to purify Cx (B) from XW,B = 0.907 to XW,B = 0.996 in the Cx-rich mixture. On the other hand, only one SC operation is required to purify Bz (A) mixture from XW,A = 0.893 to XW,A = 0.999 in the Bz-rich mixture. Thus, it is easier to separate Bz from the Bz-rich mixture than to separate Cx from the Cx-rich mixture. These experimental results are consistent with the simulations predicted by the proposed model.

Original languageEnglish
Pages (from-to)422-426
Number of pages5
JournalSeparation and Purification Technology
Volume66
Issue number2
DOIs
StatePublished - 20 04 2009

Keywords

  • Benzene
  • Crystallization
  • Cyclohexane
  • Distillation
  • Distillative freezing

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