DETERMINATION,CORRELATION AND PREDICTION OF LIQUID-LIQUID EQUILIBRIUM DATA OF n-BUTYL ALCOHOL-WATER-

• 作 者: 刘家祺 张建侯
• 机 构: Department of Chemical Engineering Tianjin University,Tianjin,
• 出 处: Journal of Chemical Industry and Engineering
• 发表日期: 1988年01期
• 关键词: ternary alcohol satisfactory have butyl weighting deviation fitting predicting a

Liquid-liquid equilibrium(LLE)data have been determined for the n-butyl alcohol-water-butyl acetateternary system and the related binary systems at 293.15,303.15 and 313.15 K.The experimentally determinedLLE data for the n-butyl alcohol-water binary system have been found to be in satisfactory agreementwith the available literature data.The correlation and prediction of the LLE data have been done byusing NRTL and UNIQUAC models.The model parameters of binary systems have been identified witha thermodynamic criterion.In the correlation of ternary LLE data,two objective functions(mole fractionand distribution constant)have been used for purpose of comparison.The effect of weighting in the firstobjective function has been examined.In predicting the ternary LLE with different sets of parameter valuesobtained for each of the constitutent binary systems,improved prediction results have been obtained bycomparing the results of different combinations of the sets of parameter values and choosing those givingthe best result.

Liquid-liquid equilibrium (LLE) data have been determined for the n-butyl alcohol-water-butyl acetate system and the related binary systems at 293.15, 303.15 and 313.15 K. The experimentally determined LLE data for the n-butyl alcohol-water binary system have been found to be in satisfactory agreement with the available literature data. The correlation and prediction of the LLE data have been done byusing NRTL and UNIQUAC models. The model parameters of binary systems have been identified witha thermodynamic criterion. The correlation of ternary LLE data , two objective functions (mole fraction and distribution constant) have been used for purpose of comparing the effects of weighting in the first objective function has been examined.In predicting the ternary LLE with different sets of parameter valuesobtained for each of the constituent binary systems, improved prediction results have been obtained by comparing the results of different combinations of the sets of parameter values ​​and choosi ng those giving the best result.