摘要
以静态分析方法，在温度为40，60℃及压力为0～10．5MPa范围内，测定了CO2-苯-1-十二烷基苯-[Bmim]Br-AlCl3的相平衡数据，比较了[Bmim]Br—AlCl3、苯、1-十二烷基苯的分配因数（各组分在富离子液体相中的质量分数与富十二烷基相中的质量分数比值）随压力变化的规律。结果表明：加入可CO2促进苯、1-十二烷基苯在离子液体中的溶解；在40℃、8．0MPa及60℃、8.0～10．5MPa条件下，苯、n-十二烷基苯、[Bmim]Br—AlCl3的分配因数接近1.0；富离子液体相及富n-十二烷基相的互溶性最强，两相转变为均一相．加入CO2有利于将异相反应转变为均相反应．
Phase equilibrium data of the quaternary system CO2-benzene-n-dodecylbenzene-[Bmim]Br-AlCl3 were determined within the temperature range of 40,60 ℃ and the pressure range of 0 ~10.5 MPa by adopting the static analytical method. Effect of pressure on distribution coefficients of [Bmim]Br-AlCl3, benzene and n-dodecylbenzene (ratio of mass fraction of compositions in ionic liquid rich phase to those in n-dodecylbenzene rich phase) were discussed respectively. The results demonstrated that solubility of benzene and n-dodecylbenzene in ionic liquid rich phase was increased by employing CO2 in the system with n-dodecylbenzene -benzene-[Bmim]Br-AlCl3. Under the conditions of 40 ℃, 8.0 MPa and 60 ℃, 8.0~10.5 MPa, distribution coefficients of [Bmim]Br-AlCl3, benzene and n-dodecylbenzene reached 1.0 respectively, where the miscibility of ionic liquid rich phase and n-dodecylbenzene rich phase was greatly enhanced,and two phase merged into one homogenous phase.
出处
《大庆石油学院学报》
CAS
北大核心
2008年第4期76-78,96,共4页
Journal of Daqing Petroleum Institute
基金
国家自然科学基金项目(20490209)
