Selection of an Optimal Entrainer for Extractive Distillation of Azeotropic Acetone/Methanol System

Acetone/Methanol계 공비물의 추출증류를 위한 최적 Entrainer 선정

  • Lee, JoonMan (Department of Chemical Engineering, Keimyung University) ;
  • Ahn, WonSool (Department of Chemical Engineering, Keimyung University)
  • 이준만 (계명대학교 화학공학과) ;
  • 안원술 (계명대학교 화학공학과)
  • Received : 2008.08.01
  • Accepted : 2008.09.16
  • Published : 2008.10.10

Abstract

A study on the selection of an optimal entrainer as the third component among water, aniline, 1,3-diethylbenzene, furfural, and MEK, for the extractive distillation of an azeotropic acetone/methanol system was performed using both the entrainer effect vapor-liquid equilibrium (VLE) and the relative volatility. In the case of water as the entrainer, a VLE curve without azeotropic point in the range of water composition from 0.3 up to 0.7 mole fraction could be obtained by both the experiment and the calculation using modified-UNIFAC model. For aniline and 1,3-diethylbenzene, however, VLE curve without azeotropic point could be obtained only at compositions above 0.7 mole fraction, which exhibited that they could be hardly utilized as the entrainer. Moreover, both furfural and MEK were verified to be improper entrainer since they formed an azeotropic phase. Relative volatility of water showed greater than 1.0 and increased with compositions, while those of the others decreased non-linearly, exhibiting that only water could be utilized as the proper entrainer for the extractive distillation of azeotropic acetone/methanol system.

Keywords

entrainer;azeotrope;modified-UNIFAC;extractive distillation;VLE

Acknowledgement

Supported by : 계명대학교

References

  1. S. J. Park, T. H. Min, and G. S. Heo, Korean Journal of Odor Research and Engineering, 4, 216 (2005)
  2. J. M. Marina and P. Tassios, Ind. Eng. Chem. Proc. Des. Dev., 12, 67 (1973) https://doi.org/10.1021/i260045a013
  3. J. Gmehling, J. Lohmann, A. Jakob, J. Li, and R. Joh, Ind. Eng. Chem. Res., 37, 4876 (1998) https://doi.org/10.1021/ie980347z
  4. J. S. Kim and J. M. LEE, J. Korean Ind. Eng. Chem., 16, 749 (2005)
  5. J. S. Kim and J. M. LEE, J. Korean Ind. Eng. Chem., 15, 449 (2004)
  6. J. J. Van Laar, Z. Phys. Chem., 72, 723 (1910)
  7. D. S. Abrams and J. M. Prausnitz, AIChE J., 21, 116 (1975) https://doi.org/10.1002/aic.690210115
  8. K. Tochigi, D. Tiegs, J. Gmehling, and K. Kojima, J. Chem. Eng. Japan, 23, 453 (1990) https://doi.org/10.1252/jcej.23.453
  9. A. Fredenslund, J. Gmehling, and P. Rasmussen, Vapor-Liquid Equilibria using UNIFAC, 1, 27, Elsevier, Amsterdam (1977)
  10. G. M. Wilson, J. Am. Chem. Soc., 86, 127 (1964) https://doi.org/10.1021/ja01056a002
  11. J. Gmehling, J. Li, and M. Schiller, Ind. Eng. Chem. Res., 32, 178 (1993) https://doi.org/10.1021/ie00013a024
  12. W. L Macabe, J. C. Smith, and P. Harriott, Unit Operations of Chemical Enigneering, 6th ed. 1, 643, McGraw-Hill, New York, (2004)
  13. K. H. Row and Y. Y. Lee, HWAHAK KONGHAK, 31, 623 (1993)
  14. J. Gmehling, R. Wittig, J. Lohmann, and R. Joh, Ind. Eng. Chem. Res., 41, 1678 (2002) https://doi.org/10.1021/ie0108043
  15. J. Gmehling, U. Onken, and W. Arlt, Vapor-Liquid Equilibrium Data Collection DECHEMA Chemistry Data Series, Part 1a, 57, Schon & Wetzel GmbH, Frankfurt (1978)
  16. 平田 泰人, 最新 蒸溜工學, 1, 110, 日刊工業新聞社, 東京 (1971)