含盐部分混溶体系汽液平衡的关联

<正> 甲醇-苯二元混合物被高氯酸钠饱和后形成部分混溶体系。本文修改了前人建议的液体模型,在此基础上提出用多参数Wilson公式关联和推断含盐部分混溶体系的恒压汽液平衡以及用多参数Wilson公式和三参数Margules公式关联和推断这一体系的恒温汽液平衡。并用本工作所测定的该体系在760.0mmHg、636.3mmHg和55.0℃下的平衡数据对所提方法作了检验,结果令人满意。文后附录部分根据理论推导提出一组求三参数Margules公式中参数值的公式。在用非线性最小二乘法处理实验数据中,把这样求得的参数值作为初值使用,比用其它方法确定的初值有较大的优越性。

The Correlation of Vapor-Liquid Equilibrium Data for partially Miscible Salt Containing Systems

The binary mixture of methanol and benzene saturated with sodium perchlorate forms a partially miscible system. In this paper, a Procedure is prsented for correlating and predicting the effects of salts on the vapor-liquid equilibrium properties of the binary mixtures which turn to partially miscible system caused by the salt addition. The procedure is based on improving the liquid model proposed previously in literature, and correlating the isobaric data by using the multi-parameter Wilson equation, while isothermal data multi-parameter Wilson equation or three- parameter Margules equation are used. The procedure is tested on experimental data of methanol benzene mixture saturated with sodium perchlorate as mentioned above at 760.0 and 636.3 mmHg and at 55.0℃. The results are very satisfactory. In addition, presented in appendix, the author deduced a set of the formula using for determination of the initial values of the parameter for the three-parameter Margules equation. When we treat the experimental data by employing the nonlinear least square method, such initial values of the parameter can give better results.