Abstract: Determine the solubility of methyl chloride in n-hexane and regress experimental data by Peng-Robinson equation of state(EOS).Phase equilibrium equipment with magnetic stirring apparatus was developed and used in mensurating the solubility of methyl chloride in n-hexane at depression. Its high precision was proved by reliability test. The solubilities at 25，30，35，40 ℃ were measured and the averages of Henry constants are 884,959,1 067,1 172 kPa. It is found that the solubility of methyl chloride in n-hexane are decreases with the temperature increased and increases with the pressure increased. The binary parameter calculated by Peng-Robinson EOS is 0.053 4.The calculated and experimental values of equilibrium pressure are compared, the average relative deviation is 0.985%.Peng-Robinson EOS is accurate in regressing and can be used in more researches.

Key words: Solubility    ,   ,  Methyl chloride    , n-Hexane  ,   ,  Binary parameter

摘要： 测定了一氯甲烷在正己烷中溶解度并利用Peng-Robinson状态方程对实验数据进行回归。利用增
加了磁力搅拌装置的相平衡釜对低压条件下一氯甲烷在正己烷中的溶解度进行了测定。通过对实验装置的可靠性
进行检验,证明了改造后的装置所测数据的精确度较高。利用该套装置,测定了25,30,35,40 ℃条件下一氯甲烷在
正己烷中的溶解度,Henry常数计算值分别为884,959,1067,1172kPa。从一氯甲烷分压和溶解度的关系曲线可
知,溶解度随着温度的升高而减小,随着压力的升高而增大。最后,利用Peng-Robinson状态方程回归出一氯甲烷
与正己烷二元交互作用参数为0.0534,同时对平衡压力进行计算,与实验值相比,平均相对偏差为0.985%。证明
Peng-Robinson状态方程对实验数据的回归是精确的,可用于进一步研究。

关键词: 溶解度  ,   , 一氯甲烷  ,    , 正己烷  ,    ,  二元交互作用参数