PMBP缩2-ABT/TBP/离子液体双水相对稀土离子的协同萃取  

Synergistic Extraction of Lanthanide Ions with PMBP-2-ABT and TBP in Ionic Liquid Two-phase Aqueous System

作　　者：陈莉莉[1,2] 邱祖民[1] 黄金莲[2] 徐礼峰[2] 

机构地区：[1]南昌大学环境科学与工程学院,江西南昌330031 [2]江西师范大学化学化工学院,江西南昌330022

出　　处：《稀土》2011年第3期68-71,共4页Chinese Rare Earths

摘　　要：研究了1-苯基-3-甲基-4-苯甲酰基-吡唑酮-5缩2-氨基苯并噻唑(PMBP缩2-ABT,简称HA)与中性磷类萃取剂磷酸三丁酯(TBP)在离子液体双水相体系中对稀土离子的萃取行为。考察了萃取剂浓度、协萃剂浓度、水相pH值、盐的加入量及温度对萃取分配比的影响。结果表明,PMBP缩2-ABT与TBP具有显著协萃作用。当pH=4.3,萃取剂与协萃剂浓度比为4∶1时,二者协萃效率最高。用斜率法确定了协萃合物的组成为[LaA.HA.TBP]2+。Synergistic extraction of lanthanide ions by 1 - phenyl - 3 - methyl - 4 - benzoyl - amino - pyrazolon - 5 - 2 - benzothiazole with tributyl phosphate （TBP） from ionic liquid aqueous two - phase system has been studied. The influences of the concentrations of co - extraction agent, extraetant, value of pH, the amount of K2 HPO4 and temperature on the distribution ratio have been discussed. The results of the experiment show that the synergism of PMBP - 2 - ABT and TBP is obvious. The co - extraction agent is the idealest on the conditions that pH equals 4.3 and the concentration ratio of extractant versus co - extraction agent is 4 ： 1. Determined by slope analysis method, the synergistic extraction compound is [ LaA · HA · TBP]^2＋.

关 键 词：离子液体双水相 PMBP缩2-氨基苯并噻唑 磷酸三丁酯 稀土离子 协同萃取 

分 类 号：O652.62[理学—分析化学]