Abstract: The authors have designed an equilibrium still with dual circulation of vapor and liquid phases and tested the still with water-acetic acid binary, system. The obtained data were compared with available data in literature and the results are found satisfactory. With the said still, vapor-liquid equilibrium data were measured for three binary systems i. e, methyl iodide-methyl acetate, methyl iodide-methanol, methyl iodide-acetic acid at 760mm Hg pressure. The first two binary systems exibit a minimum azeotrope and the third has no azeotropic behavior. Data were correlated through Wilson, NRTL and WFH equations. Optimum parameters were evaluated by means of damping and nonlinear least square method.

摘要： 作者设计了一种双循环型汽液平衡釜,以水-醋酸系作检验,所测数据与文献数据对照是满意的。以此汽液平衡釜在760mmHg压力下,测定了碘甲烷-醋酸甲酯、碘甲烷-甲醇和碘甲烷-醋酸等二元系的汽液平衡数据。前两个二元系有最低共沸物,后者则无共沸物。用Wilson、NRTL和WFH（片山型修正威尔逊）三种模型进行了数据关联。用阻尼非线性最小二乘法求解参数的最佳值。