油酸钠-离子液体微乳液对金属离子的萃取性能研究  

Study on the Extraction Properties of Sodium Oleic Acid-ionic Liquid Microemulsion to Metal Ions

作　　者：周富荣[1] 邓红[1] 李金花 Zhou Furong;Deng Hong;Li Jinhua(School of Optoelectronic Materials and Electronics,Wuhan430056,China)

机构地区：[1]江汉大学光电材料与技术学院,湖北武汉430056

出　　处：《山东化工》2022年第1期32-35,39,共5页Shandong Chemical Industry

摘　　要：以油酸钠作表面活性剂、正丁醇及[C_(14) mim]Br(1-十四烷基-3-甲基咪唑溴盐)作助表面活性剂、煤油作油相,制备了油酸钠及油酸钠-离子液体微乳液,测定了微乳体系的电导率曲线和增溶水量。以Cu^(2+)和Ni^(2+)为萃取对象,研究了两种微乳体系对金属离子的萃取性能,考察了离子液体浓度、NaOH浓度、金属离子的初始浓度以及水相与微乳液的体积比等因素对萃取后金属离子分配系数的影响。结果表明,油酸钠-离子液体微乳液比未加离子液体的油酸钠微乳液的电导率大,增溶水量更多。以[C_(14)mim]Br离子液体微乳液为萃取剂,萃取Cu^(2+)和Ni^(2+)的最佳条件为:V(油酸)∶V(正丁醇)∶V(煤油)=1∶1∶2,水乳比(体积比)为4∶1,[C_(14) mim]Br加入量为0.25 mol/L,NaOH的浓度为2 mol/L,NaCl的浓度为0.15 mol/L。在此萃取条件下,Cu^(2+)和Ni^(2+)的分配系数分别可达到99.95和99.02。Sodium oleic acid and sodium oleic acid-ionic liquid microemulsion were prepared using sodium oleic acid as surfactant,positive butanol and[C_(14)mim]Br(1-tetealyl-3-methimidazole bromine)as auxiliary surfactant and kerosene as oil phase.The electrical conductivity curve and the increased dissolved water volume of the microemulsion system were determined.The extraction properties of two microemulsion systems for metal ions were studied with Cu^(2+)and Ni^(2+).The influence of ionic liquid concentration,NaOH concentration,initial concentration of metal ions and volume ratio of water phase to microemulsion on the distribution coefficient of metal ions after extraction were investigated.The results show that sodium oleic acid-ionic liquid microemulsion had higher conductivity and more soluble water than sodium oleic microemulsion with unionic liquid.The best conditions for extracting Cu^(2+)and Ni^(2+)with microemulsion of[C_(14)mim]Br ionic liquid as extractant are:oleic acid∶n-butyl alcohol∶kerosene=1∶1∶2(volume ratio),water emulsion ratio(volume ratio)is 4∶1,[C_(14)mim]Br addition amount is 0.25 mol/L,concentration of NaOH is 2 mol/L,concentration of NaCl is 0.15 mol/L.Under this extraction condition,the allocation coefficients of Cu^(2+)and Ni^(2+)can reach 99.95 and 99.02,respectively.

关 键 词：油酸钠 离子液体 微乳液 金属离子 萃取 

分 类 号：TQ028.3[化学工程]