화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.35, 369-375, March, 2016
DOI10.1016/j.jiec.2016.01.016  Export Citation
Liquid.liquid equilibrium data and correlation for quaternary systems of acetic acid + water + methyl acetate + p-xylene at 313.2 K
Gregorius Rionugroho Harvianto, Seo Eun Kim, Ki Joon Kang1, Alireza Bahadori2, and Moonyong Lee†
  • Process Systems Design and Control Laboratory, School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
  • 1TPT Pacific Co. Ltd., Insa-Dong, Jongno-Gu, Seoul 03162, Republic of Korea
  • 2School of Environment, Science and Engineering, Southern Cross University, PO Box 157, Lismore, NSW, Australia
E-mail:
The experimental liquid.liquid equilibrium (LLE) data of the quaternary (acetic acid + water + pxylene + methyl acetate) system was investigated at 313.2 K and atmospheric pressure. This research is aimed to examine the potential of the mixture of methyl acetate and p-xylene, which available as the remaining substances in terephthalic acid production, to be prospective extracting solvent for the acetic acid dehydration. LLE phase diagrams at different ratio of p-xylene to methyl acetate were presented for this quaternary system. The results showed that an enlargement of the LLE two-phase region occurred with increasing p-xylene to methyl acetate mass ratio in the initial solvent phase. The distribution coefficient and selectivity for the extraction of acetic acid were also obtained to evaluate the capability of solvent. LLE data were sufficiently correlated by Othmer-Tobias and Bachman equations. The experimental results were used to obtain binary interaction parameters as correlated by the nonrandom two liquid (NRTL) and universal quasi-chemical theory (UNIQUAC) equation models. The root mean square deviations (RMSD) values as low as 0.0119 and 0.0128 were calculated for NRTL and UNIQUAC, respectively; indicating excellent results for both models were suitable for the determination of LLE data of this quaternary system.
Keywords:Liquid-liquid equilibrium;Acetic acid extraction;Methyl acetate;Quaternary system;Terephthalic acid production
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