P_(204)-P_50_7-H_2SO_4体系萃取稀土元素的研究  

Extracting Rare Earth from D_2EHPA-HEHEHP-H_2SO_4 System

作　　者：李建宁[1] 黄小卫[1] 朱兆武[1] 龙志奇[1] 彭新林[1] 崔大立[1] 

机构地区：[1]北京有色金属研究总院稀土材料国家工程研究中心有研稀土新材料股份有限公司,北京100088

出　　处：《中国稀土学报》2007年第1期55-58,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金(50374015;50674016)资助项目

摘　　要：对P204与P507混合萃取剂在硫酸介质中萃取分离Nd和Sm的行为进行了研究。重点考察了在硫酸介质中,P204添加一定量P507对稀土萃取能力、反萃性能以及Nd-Sm分离效果的影响。测定了不同比例的混合有机相在不同平衡酸度下的Nd,Sm分配比以及协同系数,并得到了相应条件下的Sm/Nd分离系数。试验结果表明,P204与P507混合体系在硫酸介质中萃取分离Nd,Sm时存在不同程度的正协同效应。The extraction and separation of Nd and Sm from sulfuric acid medium with mixed extraction of D2EHPA and HEHEHP were researched. Meanwhile, the influences on the extraction capability and characteristics of counter extraction as well as the separation effect of Nd and Sm from sulfuric acid medium with D2EHPA added by HEHEHP were studied. The distilbution ratios and synergistic coefficients of Nd and Sm at different acidities were determined. Meanwhile, the corresponding separation coefficient of Sm/Nd was calculated. When D2EHPA and HEHEHP were used as synergistic extractant to extract Sm or Nd, positive synergistic extractive effect was found in this system.

关 键 词：P204 P507 硫酸介质 协同萃取 SM ND 稀土 

分 类 号：O614.3[理学—无机化学]