화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.31, No.10, 1824-1830, October, 2014
DOI10.1007/s11814-014-0115-2  Export Citation
Solvent screening for the separation of ethylbenzene and p-xylene by extractive distillation
Yukwon Jeon1, Sung Wook Row1, 2, Gichun Lee1, Sang Sun Park1, Young-Jong Seo3, Young Hwan Chu4, and Yong-Gun Shul1, †
  • 1Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Korea
  • 2GS Engineering & Construction, 33 Jong-ro, Jongro-gu, Seoul 110-130, Korea
  • 3The 4th Research Team, Daedeck Research Institute, Lotte Chemical Corp., Jang-dong #24-1, Yuseong-gu, Daejeon 305-726, Korea
  • 4Department of New Energy · Resource Engineering, College of Science & Engineering, Sangji University, 124, Sangjidae-gil, Wonju-si, Gangwon-do 220-702, Korea
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Extractive distillation is one of the most effective processes for the separation of ethylbenzene and p-xylene. The goal was to find single solvents or combinations of multi-solvents with good properties while minimizing the ratio of solvent to feed. The distillations were performed at equilibrium to determine the relative volatility of ethylbenzene to p-xylene with the extractive solvents under isothermal condition. For a single extraction solvent, 1,2,4-trichlorobenzene had the highest relative volatility at 1.123. In some cases, combinations of two or three solvents were used as well as different ratios of solvent to feed to investigate the synergy effect of the mixture solvents. The binary solvent mixture of 1,2,4-trichlorobenzene and maleic anhydride (2 : 1) had the best performance with a relative volatility of 1.228 at the solvent/feed ratio of 1 : 1. Some of the solvents were further studied at different solvent/feed (S/F) ratios. Selected solvents generally tended to have higher relative volatilities at high S/F ratios, but the operation cost will increase. Therefore, it is important to find the proper conditions to optimize the S/F ratio for extractive distillation from the industrial point of view.
Keywords:Ethylbenzene;p-Xylene;Extractive Distillation;Solvent Screening;Relative Volatility
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