正丁醇、乙酸乙酯、正己烷的二元及三元体系的超额焓测量和关联

Measurement and Correlation of Excess Enthalpy fer Binary and Ternary Systems Containing n-Butanol,Ethylacetate,n-Hexane

用等温稀释量热计测定了正己烷+正丁醇、正己烷+乙酸乙酯二元体系在303.15 K、308.15K及正丁醇+乙酸乙酯+正己烷三元体系在303.15 K的超额焓,用Kretschrner-Wiebe理论组合UNIQUAC方程所得数学模型对二元体系在303.15 K的超颠焓进行了关联,并预测了所测三元体系在303.15 K的超额焓,预测结果与实验值比较,平均偏差为6％。

Excess enthalpies were measured by an isothermal dilution calorimeter for the binary mixtures of n-hexane + n-butanol, and n-hexane +ethyl acetate at 303. 15 K, 308. 15 K, and for the ternary mixture of n-butanol +ethyl acetate + n-hexane at 303. 15 K, respectively. A mathematical model was employed to correlate the excess enthalpies of binary systems for n-butanol-(-ethyl acetate, n-hexane+n-butano] and n-hexane+ethyl acetate at 303. 15 K. The excess enthalpies of the ternary system presented in this paper are well predicted according to the model. The average deviation between the experimental and predicted values is 6%.