A Regular Associated Model for Binary Solutions of Some Polar Solvents with C_8 Aromatic Hydrocarbons

Shen Weiguo; Chen Mingzhi; Chen Wufeng and Zheng Guokang(Department of Chemistry; Lanzhou University)

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A Regular Associated Model for Binary Solutions of Some Polar Solvents with C_8 Aromatic Hydrocarbons

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- A Regular Associated Model for Binary Solutions of Some Polar Solvents with C_8 Aromatic Hydrocarbons
- CIESC Journal Issue 1, (1985)
- 作者机构：
  
  兰州大学化学系,兰州大学化学系,兰州大学化学系,兰州大学化学系
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 March 1985，
  
  Published：25 March 1985
- 稿件说明：
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Shen Weiguo, Chen Mingzhi, Chen Wufeng and Zheng Guokang(Department of Chemistry, et al. A Regular Associated Model for Binary Solutions of Some Polar Solvents with C_8 Aromatic Hydrocarbons[J]. CIESC Journal, 1985, (1).
DOI：

Shen Weiguo, Chen Mingzhi, Chen Wufeng and Zheng Guokang(Department of Chemistry, et al. A Regular Associated Model for Binary Solutions of Some Polar Solvents with C_8 Aromatic Hydrocarbons[J]. CIESC Journal, 1985, (1). DOI：

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.

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.

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