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Ternary liquid-liquid equilibrium for systems of fatty acid methyl ester(methyl palmitate/methyl stearate)+ethanol+glycerol at atmospheric pressure

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Abstract

Liquid-liquid equilibrium data of two ternary systems methyl palmitate+ethanol+glycerol and methyl stearate+ethanol+glycerol at(318.2 and 333.2)K and atmospheric pressure were measured. The values of distribution coefficient and selectivity were calculated, which indicates that glycerol can be separated from fatty acid ester by using ethanol as an extraction solvent. The consistency of the isothermal tie-line data were checked by the Othmer-Tobias equation. The correlation coefficients R 2 are higher than 0.993,9 for all the fitted curves. The NRTL activity coefficient model was applied to the correlation of the measured tie-line data. The root mean square deviation(RMSD)values are less than 0.007 for all the systems, which shows a good predictive capability of this model for such systems.

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Authors and Affiliations

  1. Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin, 300072, China

    Shuqian Xia  (夏淑倩), Huijuan Luo  (罗慧娟) & Peisheng Ma  (马沛生)

  2. Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin, 300072, China

    Shuqian Xia  (夏淑倩), Huijuan Luo  (罗慧娟) & Peisheng Ma  (马沛生)

  3. School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China

    Shuqian Xia  (夏淑倩), Huijuan Luo  (罗慧娟) & Peisheng Ma  (马沛生)

Authors
  1. Shuqian Xia  (夏淑倩)
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  2. Huijuan Luo  (罗慧娟)
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  3. Peisheng Ma  (马沛生)
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Correspondence to Shuqian Xia  (夏淑倩).

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Supported by Tianjin Natural Science Foundation (No.13JCYBJC19300).

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Xia, S., Luo, H. & Ma, P. Ternary liquid-liquid equilibrium for systems of fatty acid methyl ester(methyl palmitate/methyl stearate)+ethanol+glycerol at atmospheric pressure. Trans. Tianjin Univ. 21, 392–399 (2015). https://doi.org/10.1007/s12209-015-2561-2

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  • DOI: https://doi.org/10.1007/s12209-015-2561-2

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