The first attempt at continuous-mode separation of racemic and meso-2,3-butanediol with high purities using a simulated-moving-bed process

Chung Gi Lee, Ye Jin Song, Ki Bong Lee, Sungyong Mun

Research output: Contribution to journalArticle

Abstract

To maximize the industrial value of biologically produced 2,3-butanediol (BD), it is essential to separate BD into its stereoisomeric fractions, meso-BD and racemic-BD. To address such issue, a highly efficient BD-isomer separation process based on a simulated-moving-bed (SMB) mode was developed in this study. As a first step for this task, the competitive adsorption behaviors of meso-BD and racemic-BD on a properly selected adsorbent were investigated, and their relevant isotherm parameters were determined using inverse method. The determined isotherm parameters were then applied to the design of the BD-isomer separation process based on an SMB mode, which was carried out in such a way that both BD isomers could be separated with high purities and little losses in a continuous countercurrent mode. The performance of the designed SMB process for the targeted separation was experimentally investigated. It was confirmed from the experimental results that the BD-isomer separation SMB process, which was developed in this study for the first time, could be effective in the continuous-mode separation of meso-BD and racemic-BD with the purities higher than 99.9% and 97% respectively while maintaining their losses below 1%. The results of this study are expected to pave the way for establishing a highly economical process for a large-scale production of meso-BD and racemic-BD with high purities.

Original languageEnglish
JournalJournal of Industrial and Engineering Chemistry
DOIs
Publication statusAccepted/In press - 2019 Jan 1

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Isomers
Isotherms
Adsorbents
2,3-butylene glycol
Adsorption

Keywords

  • 2,3-Butanediol isomers
  • Continuous separation
  • Meso-2,3-Butanediol
  • Process design
  • Simulated moving bed

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

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title = "The first attempt at continuous-mode separation of racemic and meso-2,3-butanediol with high purities using a simulated-moving-bed process",
abstract = "To maximize the industrial value of biologically produced 2,3-butanediol (BD), it is essential to separate BD into its stereoisomeric fractions, meso-BD and racemic-BD. To address such issue, a highly efficient BD-isomer separation process based on a simulated-moving-bed (SMB) mode was developed in this study. As a first step for this task, the competitive adsorption behaviors of meso-BD and racemic-BD on a properly selected adsorbent were investigated, and their relevant isotherm parameters were determined using inverse method. The determined isotherm parameters were then applied to the design of the BD-isomer separation process based on an SMB mode, which was carried out in such a way that both BD isomers could be separated with high purities and little losses in a continuous countercurrent mode. The performance of the designed SMB process for the targeted separation was experimentally investigated. It was confirmed from the experimental results that the BD-isomer separation SMB process, which was developed in this study for the first time, could be effective in the continuous-mode separation of meso-BD and racemic-BD with the purities higher than 99.9{\%} and 97{\%} respectively while maintaining their losses below 1{\%}. The results of this study are expected to pave the way for establishing a highly economical process for a large-scale production of meso-BD and racemic-BD with high purities.",
keywords = "2,3-Butanediol isomers, Continuous separation, Meso-2,3-Butanediol, Process design, Simulated moving bed",
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AB - To maximize the industrial value of biologically produced 2,3-butanediol (BD), it is essential to separate BD into its stereoisomeric fractions, meso-BD and racemic-BD. To address such issue, a highly efficient BD-isomer separation process based on a simulated-moving-bed (SMB) mode was developed in this study. As a first step for this task, the competitive adsorption behaviors of meso-BD and racemic-BD on a properly selected adsorbent were investigated, and their relevant isotherm parameters were determined using inverse method. The determined isotherm parameters were then applied to the design of the BD-isomer separation process based on an SMB mode, which was carried out in such a way that both BD isomers could be separated with high purities and little losses in a continuous countercurrent mode. The performance of the designed SMB process for the targeted separation was experimentally investigated. It was confirmed from the experimental results that the BD-isomer separation SMB process, which was developed in this study for the first time, could be effective in the continuous-mode separation of meso-BD and racemic-BD with the purities higher than 99.9% and 97% respectively while maintaining their losses below 1%. The results of this study are expected to pave the way for establishing a highly economical process for a large-scale production of meso-BD and racemic-BD with high purities.

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