作　　者： ; ; ;

机构地区： 广东药学院药科学院

出　　处： 《高校化学工程学报》 2008年第4期553-556,共4页

摘　　要： 通过对1-丁基-3-甲基咪唑四氟硼酸盐([bmim][PF4])离子液体+水体系相平衡及NaCl、NaBF4和氯化1-丁基-3-甲基咪唑([bmim]Cl)对离子液体+水体系相平衡的影响进行了研究,结果表明:离子液体[bmim][BF4]+H2O二元体系具有典型的最高上临界溶解温度(UCST)行为,其最高上临界温度为5.3℃左右,临界组成为50%(水的质量分数);NaCl和NaBF4降低[bmim][BF4]+H2O体系的混溶性,而[bmim]Cl增加该体系的混溶性。由此得到一种简单定性地判断离子液体[bmim][BF4]中可能存在的杂质种类和水平的方法,并利用此结果可设计纯化该离子液体的绿色工艺。 The phase equilibrium of 1-buthy-3-methylimidazolium tetrafluoroborate （[bmim][BF4]） ionic liquid ＋ H2O system and the effect of NaCl, NaBF4 and 1-buthy-3-methylimidazolium chloride （[bmim]Cl） on the phase equilibrium of [bmim][PF4] ＋ H2O system were studied. The results show that [bmim][BF4] ＋ H2O system has the upper critical solution temperature （UCST） type phase behavior; its upper critical solution temperature is about 5.3℃, and the corresponding critical composition of H2O is 50%（wt.）. It was found that NaCl and NaBF4 in [bmim][BF4] ＋ H2O system will decrease the miscibility of the system, while [bmim]Cl in the system will increase the miscibility of the system. According to these results, a simple and qualitative method of estimating the type and the level of the impurity in ionic liquid [bmim][BF4] was obtained, and the technological design of green purification of this ionic liquid can be carried out as well.

关 键 词： 离子液体 丁基 甲基咪唑四氟硼酸盐 相平衡 混溶温度

领　　域： [理学] [理学]