Chemical Research in Chinese Universities ›› 1988, Vol. 4 ›› Issue (3): 34-39.

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Calculating the Activity Coefficient of Phosphate in Various Diluent by the UNIFAC Method

Wang Liya, Zhong Yunxiao   

  1. Department of Technical Physics, Peking University, Beijing
  • Received:1987-10-19 Online:1988-08-24 Published:2011-09-09

Abstract: This paper extends the UNIFAC method to calculate tne pnospnate-diluents systems. The parameters of interaction between (-O)3 P=O and CH2, CCl4, CHCl3, ACH, ACCl, CH-O, H2O etc. are determined with the experimental data of Tri-iso-butylphosphate(TiBp)-diluents and Tri-(2-ethyl)hexylphosphate(TEHP)-diluents systems. These parameters were applied to calculate the activity coefficient of TBP-diluents and TEHP-diluents systems. The result agrees excellently with experimental data.

Key words: UNIFAC method, Phosphate, Activity coefficients