Cyanex 923对稀土元素硝酸盐的萃取  

Extraction of Rare Earth Ions From Nitrate Medium With Cyanex 923

作　　者：储德清[1] 马根祥[1] 李德谦[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：《分析化学》1998年第11期1346-1349,共4页Chinese Journal of Analytical Chemistry

基　　金：国家攀登计划!(稀土化学中若干重大问题的基础研究);自然科学基金!(29771028)

摘　　要：研究了Ｃｙａｎｅｘ９２３在正庚烷溶液中对１５种稀土元素硝酸盐的卒取，计算了分离系数，得出了反应机理，考察了温度对萃取平衡的影响以及萃合物的红外光谱，发现Ｃｙａｎｅｘ９２３有可能应用于从轻稀土中分离镧以及从重稀土中分离钇。The extraction of 15 rare earths (RE(Ⅲ ) ) in nitrate medium with Cyanex 923 in n-heptane has been studied. The logarithm of distribution ratios increased with increasing atomic number and demonstrated 'tetra effect'. The extraction mechanisms, The separation factors and the effect of temperature on the extraction have been examined. The results showed that Cyanex 923 could be applied to the separation of La from rare earth mixtures, Y from heavier rare earth mixtures. The IR spectrum of the extracted complex has also been discussed.

关 键 词：稀土硝酸盐 萃取剂 Cyanex923 镧 钇 

分 类 号：O614.331[理学—无机化学] O614.322[理学—化学]