氨基磷酸萃取剂对氯化物介质中重稀土的协同提取与分离

Synergistic Extraction and Separation of Heavy Rare Earth in Chloride Medium with Aminophosphoric Acid Extractant

2-乙基己基-3-(2-乙基己基氨基)戊烷-3-磷酸(HEHAPP,H_(2)A_(2))是一种α-氨基磷酸萃取剂,它和二(2-乙基己基)磷酸(D2EHPA,H_(2)B_(2))的二元混合物可以用于从氯化物介质中提取和分离稀土元素(REs)。研究发现,混合物的Yb^(3+)萃取过程存在显著的协同效应,重稀土相邻元素(Ho、Er、Tm、Yb、Lu)的分离系数远高于其他协同系统,表明HEHAPP和D2EHPA的混合物可用于协同提取与分离重稀土元素。

2-ethylhexyl-3-(2-ethylhexylamino) pentane-3-phosphoric acid (HEHAPP,H_(2)A_(2)) is a α-aminophosphoric acid extractant,its binary mixture with di(2-ethylhexyl) phosphoric acid (D2EHPA,H_(2)B_(2)) can be used to extract and separate rare earth elements (REs) from chloride medium.The study finds that there is a significant synergistic effect in the Yb^(3+) extraction process of the mixture,and the separation coefficients of adjacent heavy rare earth elements (Ho,Er,Tm,Yb,Lu) are much higher than those of other synergistic systems,indicating that the mixture of HEHAPP and D2EHPA can be used for synergistic extraction and separation of heavy rare earth elements.