【摘要】 通过测定二元溶液的总蒸气压,以环己烷作惰性参考物质,得到N-甲基吡咯烷酮、硝基苯、苯甲腈的扩展的溶解度参数.提出一个改进的正规缔合溶液模型,利用所得的扩展的溶解度参数处理上述三种极性溶剂与苯乙烯、邻二甲苯构成的二元系的总压-组成数据.用ALGOL语言编写了非线性最小二乘法程序,在<121>机上进行曲线拟合和参数估值,得到化学作用对活度系数的贡献.计算结果表明化学因素是N-甲基吡咯烷酮分离苯乙烯与邻二甲苯体系的重要因素.更多还原

【Abstract】 Taking cyclohexane as an inert reference solvent, the expanded solubility parameters of l-methyl-2-pyrrolidone, nitrobenzene and benzonitrile have been obtained by measuring total vapor pressures. An improved regular associated model was used to treat total pressure-composition data of binary mixtures of 1-methyl-2-pyrrolidone, nitrobenzene or benzonitrile with styrene or o-xylene. A program of non-linear least-square fitting was written in ALGOL language to fit the curves and to estimate the parameters on a (121) computer. The contribution of chemical interaction to activity coefficient was calculated. For l-methyl-2-pyrrolidone as a solvent, the result showed that chemical interaction is an important factor in separating styrene from o-xylene.更多还原