摘要
利用静态分析法,在40℃、0.10—10.60MPa条件下考察了CO2-苯-1-十二烷基苯-[Bmim]Br-A1Cl3、CO2-苯-1-十四烷基苯-[Bmim]Br—AICl3、CO2-苯-1-十六烷基苯-[Bmim]Br—AICl3三种四元体系的相态并测定了相平衡数据,比较了长链烷基苯的分配系数(长链烷基苯在底部液相中的质量分数与其在中间相中质量分数的比值)随压力变化的规律。结果表明:加入CO2促进了长链烷基苯在离子液体中的溶解。在40℃、8.10MPa条件下,CO2-苯-1-十二烷基苯-[Bmim]Br—AICl3体系有新中间液相生成;随着长链烷基苯链长的增加,底部液相由液相逐渐转变为固相。在40℃、8.10MPa条件下,1-十二烷基苯、1-十四烷基苯的分配系数接近1.0;在40℃、4.00MPa条件下,1-十六烷基苯的分配系数接近1.0。
Static-analytic method was adopted to determine the phase behavior of CO2 -benzene - LABs - [ Bmim ] Br-AlCl3 at 40 ℃ under 0. 10 - 10. 60 MPa. Effect of pressure on the distribution coefficient of LABs( long-chain alkylbenzenes) was discussed. The results demonstrated that CO2 was helpful to enchance solubility of LABs in [ Bmim] Br-AlCl3. At 40 ℃ under 8, 10 MPa,a new middle liquid phase emerged in the system CO2 - benzene - dodecylbenzene - [ Bmim ] Br-AlCl3. With the increasing of chain length of LABs in the system, the bottom liquid phase was converted from liquid to solid state. Distribution coefficients of dodecylbenzene and tetradecylbenzene reached 1.0 at 40 ℃ Under 8.10 MPa,and that of hexadecylbenzene did so at 40 ℃ under 4. 00 MPa.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2008年第10期1037-1040,共4页
Fine Chemicals
基金
国家自然科学基金项目(20490209)~~