Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (01): 124-128.doi: 10.3866/PKU.WHXB20070126

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Thermodynamic Properties of Binary Mixture of Tributylphosphate and n-Alkanols

LIU Hong-Li;LIU Shi-Jun;XIAO Zhong-Liang;CHEN Qi-Yuan   

  1. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China; Department of Chemistry and Environmental Engineering, Changsha University of Science & Technology, Changsha 410076, P. R. China
  • Received:2006-06-15 Revised:2006-08-24 Published:2007-01-08
  • Contact: LIU Shi-Jun

Abstract: The excess molar enthalpies for binary systems of tributylphosphate(TBP) +methanol/ethanol/1-propanol/1-butanol were measured by calorimetry at 298.15 K as well as a little mixtures at 293.15 K and 303.15 K. The experimental results were in the range of −0.3 − 0.3 kJ•mol−1 and were invariant with the change of temperature. The excess molar entropies, excess molar Gibbs free energies, and activity coefficients for the binary mixtures had been obtained according to the athermal solution model. The thermodynamic analysis showed that the model provided reliable results for binary mixtures of TBP+methanol/ethanol/propan-1-ol, but did not for TBP+butan-1-ol.

Key words: TBP, Alkanols, Thermodynamic properties, Athermal solution