[Omim][BF4]基离子液体微乳液萃取金属镧离子的研究

[Omim][BF]-based Ionic Liquid Microemulsion Extraction of Metal Lanthanum Ions

制备了OP-4+OP-7/苯甲醇/煤油/P204/[Omim][BF4]/HCl微乳液体系,采用FTIR光谱以及表面张力方法对该微乳液体系的结构进行表征,并研究了该离子液体微乳液对La^3+的萃取行为,考察了不同的料液浓度、料液酸度、振荡时间、水乳比、温度等因素对La^3+萃取率的影响。结果表明:OP-4+OP-7/苯甲醇/煤油/P204/[Omim][BF4]/盐酸体系中形成了W/O结构;少量的[Omim][BF4]可对La^3+的萃取起到显著提升的作用,得到较高的萃取率;当水乳比为3∶1,振荡时间为8 min,料液浓度为0.004 mol·L^-1,p H为3时,萃取率最高可达94.94%。

OP-4+OP-7/benzyl alcohol/kerosene/P204/[Omim][BF4]/hydrochloric acid microemulsion system was prepared.The structure of the microemulsion system was characterized by FTIR spectroscopy and surface tension method,and the extraction behavior of this ionic liquid microemulsion for La^3+was studied.The effects of different feed liquid concentration,feed liquid acidity,shaking time,volume ratio of feed solution to microemulsion,temperature and other factors on La^3+extraction rate were investigated.The results showed that OP-4+OP-7/benzyl alcohol/kerosene/P204/[Omim][BF4]/hydrochloric acid system formed a W/O structure.A small amount of[Omim][BF4]could significantly improve the extraction of La^3+,resulting in a higher extraction rate.When volume ratio of feed solution to microemulsion was 3∶1,the shaking time was 8 min,the feed liquid concentration was 0.004 mol·L^-1,and p H was 3,the extraction rate could reach up to 94.94%.