丙酮-环烷烃体系的无限稀释活度系数的气提法测定研究  

Studies on the Determination of Infinite Dilution Activity Coefficients of Acetone-Cycloalkane Systems by Gas Stripping Method

作　　者：鲍坚斌 杭莱莱 凌月平 陈庚华[1] 韩世钧[1] 

机构地区：[1]浙江大学化学系,杭州310027

出　　处：《高等学校化学学报》1993年第9期1280-1283,共4页Chemical Journal of Chinese Universities

基　　金：浙江省自然科学基金(No.290044)

摘　　要：如果溶剂是高挥发性物质,当用气提法测定无限稀释活度系数时需要加预饱和釜以消除气提时因溶剂量损失过大而带来的问题.本文就丙酮-甲基环戊烷、丙酮-环己烧和丙酮-甲基环己烷3个体系在298.2～318.2K温度范围内的γ~∞作了测定,用所得数据作全浓度范围的汽液平衡推算,与文献中实验值对比,发现Wilson方程结果最佳.A pre-saturator would be added for the gas stripping method to maintain the amounts of the solvent if it was a high-volatile substance. The infinite dilution activity coefficients of three acetone-cycloalkane systems: acetone-methyl cyclopentane, acetone-cyclohexane, acetone-methyl cyclohexane have been determined in the 298.2-318.2 K temperature region. Linear dependence of Inγ∞ on 1/T is found for all systems, and the temperature parameters are in the order: cyclohexane<methyl cyclopentane<methyl cyclohexane. Furthermore, the experimental results are used to predict the whole range VLE. The results show that Wilson equation gives the best fit to literature data.

关 键 词：丙酮 环烷烃 活度系数 气提法 

分 类 号：O623.521[理学—有机化学]