铒在HBTMPTP-正庚烷/水溶液间的传质动力学  

Mass Transfer of Er(Ⅲ) Between HBTMPTP Dissolved in n-Heptane and HAc-NaAc

作　　者：乐善堂[1] 马根祥[1] 李德谦[1] 苏锵[1] 

机构地区：[1]中国科学院长春应用化学研究所稀土化学与物理开放实验室,长春130022

出　　处：《高等学校化学学报》2000年第6期832-835,共4页Chemical Journal of Chinese Universities

基　　金：国家重点基础研究发展规划项目 !(稀土功能材料的基础研究批准号 :G19980 613 0 2 );国家自然科学基金!(批准号 :2 97710 2 8;2 980 10

摘　　要：在 ( 3 0± 0 .5)℃下 ,用层流恒界面池研究了铒在 HBTMPTP-正庚烷 -0 .2 mol/ L( H,Na) Ac萃取体系中的传质动力学 .测定了该体系的界面张力 ,考察了水相酸度、萃取剂浓度、氯离子浓度、温度和比界面对萃取速率的影响 .实验表明 ,在本实验条件下 ,萃取过程属于扩散控制过程 .Cyanex3 0The rate of extraction of Er(Ⅲ) from aqueous acetate solutions at 0.2 mol/L ionic strength by HBTMPTP in n heptane was studied by using a constant interfacial area cell with laminar flow at (30± 0.5) ℃. The interfacial activity of HBTMPTP was investigated at n heptane/ 0.2 mol/L(H, Na)Ac (pH= 5.00 ) interface. The rate of Er(Ⅲ) extraction was measured at different chemical compositions by varying hydrogen ion, HBTMPTP, Cyanex 302 and chlorine ion concentrations. The effect of stirring speed, temperature and special interfacial area on the rate of extraction was also studied. The results showed that, under the conditions of the experiments, the overall rate is diffusion controlled. It was found that the impurities of Cyanex 302 have the effect of synergistic extraction. [WT5HZ]

关 键 词：萃取 动力学 铒 HBTMPTP 传质模式 

分 类 号：O614.344[理学—无机化学] O652.62[理学—化学]