丙烯腈、己二腈和丙腈与水的二元体系液-液相平衡数据的测定和关联(英文)

采用平衡法测定了丙烯腈+水、己二腈+水、丙腈+水三个二元体系在不同温度(303.15、313.15、323.15、333.15K)下的液-液相平衡数据;并采用NRTL(α=0.2,α=0.3)模型和UNIQUAC模型对液-液平衡数据进行了关联.结果显示,NRTL和UNIQUAC模型对三个二元体系在不同温度下的互溶度关联的目标函数值均小于1×10-17,实验值与计算值吻合较好,绝对偏差小于0.009,关联精度较高.该研究结果可为丙烯腈、丙腈和水三元平衡溶解度数据的模拟和预测提供可靠的基础数据,并对电解二聚法生产己二腈中电解液的分离提纯工艺具有一定的指导意义.

Measurement and correlation of liquid-liquid equilibrium data for binary systems of adiponitrile as well as propionitrile and acrylonitrile with water

Liquid-liquid equilibrium data for the binary systems of adiponitrile H- water, propi- onitrile ＋ water and acrylonitrile - water at 303.15, 313.15, 323.15 and 333.15 K under nor- mal pressure were measured by equilibrium method. Meanwhile, both NRTL （ = 0.2, a = 0.3） and UNIQUAC models were applied to correlate the measured liquid-liquid equilibrium data, and the correlation accuracies of two models were analyzed. Results indicate that the ob- jective function values of both models are less than 1 X 10-17 , the experimental data are in good agreement with the calculated ones, and the absolute deviation between calculated and experi- mental values is less than 0.009, corresponding to desired correlation accuracy. The present re- search results can provide basic data for simulating and predicting the liquid-liquid equilibrium data of propionitrile-acrylonitrile-water ternary system and giving reference for the separation and purification processes of the electrolytes during the production of acrylonitrile by electro- lytic dimerization method.