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N,N’-二(十二烷基)乙二胺二乙酸萃取钕的研究
Study on Extraction of Nd with a New Reagent N,N’-di(dodecyl)ethylenediamien-di-acetic Acid
【摘要】 研究了以N,N’-二(十二烷基)乙二胺二乙酸(简写为H2R2Y)为络合剂、氯仿作为稀释剂萃取稀土钕的行为。考察了水相酸度、萃取剂浓度、温度、相比等对萃取率的影响。用摩尔比法和电导法确定了R2H2Y与N d3+的络合比为2∶1。实验表明,钕的萃取率随络合剂浓度增大而增大,分配比在22℃~35℃范围内随温度的升高而降低,在pH=6~7范围内,H2R2Y对N d3+的萃取率接近100%。
【Abstract】 Extraction behaviour of Nd(Ⅲ) with a new trilon N,N’-di(dodecyl) ethylenediamien-di-acetic acid(H2R2Y)in chloroform has been investigated.The influence of acidity、concentration of H2R2Y、phase-radio and temperature of extraction reaction has been studied.Complex ratio between H2R2Y and Nd3+ 2∶1 was substantiated by conductance and mole ratio method.The results indicate that percentage extraction of Nd3+ increases with the increase of concentration of H2R2Y and the distribution ratio lgD decreases linearly with the increase of temperature at range 22℃~35℃,when pH=6~7,E≈100%.
【Key words】 N,N’-di(dodecyl)ethylenediamien-di-acetic acid; trilon reagent; extraction; chelate; neodymium;
- 【文献出处】 稀土 ,Chinese Rare Earths , 编辑部邮箱 ,2006年03期
- 【分类号】TF845
- 【被引频次】5
- 【下载频次】117