Liquid–liquid equilibria of the Ternary System Thiophene + Octane + Dimethyl Sulfoxide at different temperatures

摘要：

Liquid-liquid equilibria (LLE) data of the ternary system thiophene + octane + dimethyl sulfoxide at 40, 50 and 60 ℃ and atmospheric pressure were determined using equilibria kettle with the standard curve method. The distribute relation of thiophene between extract and raffinate and a practical formula of equilibria data for industrial extraction were obtained. NRTL model and UNIQUAC model were also used to correlate and calculate LLE data of system, and model parameters were determined using the simplex optimization method and imitative Newton method with a minimized objective function of mole fraction deviation. The rule of thermodynamic equilibria was used to deal with multi-roots problem in correlating process. Agreement between predicted and experimental data was satisfactory. The average absolute deviation of the NRTL and UNIQUAC models of thiophene mass fraction were 0.0040 and 0.0078 respectively. The UNIQUAC model was suitable with the calculation for the LLE data of the ternary system thiophene + octane + dimethyl sulfoxide.

关键词： Liquid-liquid equilibria Thiophene Octane Dimethyl sulfoxide NRTL model UNIQUAC model

作者: Wenlin Zhang Kaihu Hou Guanjie Mi Na Chen

作者单位: School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China

会议类型: 国际会议

会议名称: The 5th International Conference on Separation Science and Technology(第五届国际分离科学与技术会议)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-10-14（万方平台首次上网日期，不代表论文的发表时间）