Study on Separation Technology of Pr and Nd in D2EHPA-HCl-LA Coordination Extraction System

Yin  Shaohua; Wu Wenyuan; Bian Xue

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Study on Separation Technology of Pr and Nd in D2EHPA-HCl-LA Coordination Extraction System

Yin Shaohua #,Wu Wenyuan *,Bian Xue #

School of Materials and Metallurgy, Northeastern University

*Correspondence author

#Submitted by

Subject:

Funding: Scientific Research special Foundation of Doctor subject of Chinese Universities（No.20090042120015）, National Natural Science Foundation of China （No.50974042）, The Fundamental Research Funds for the Central Universities（No.N090302007）

Opened online:23 November 2010

Accepted by: none

Citation: Yin Shaohua,Wu Wenyuan,Bian Xue.Study on Separation Technology of Pr and Nd in D2EHPA-HCl-LA Coordination Extraction System[OL]. [23 November 2010] http://en.paper.edu.cn/en_releasepaper/content/4391810

The separation coefficient of Nd /Pr was lower in D2EHPA -HCl system. Pointing to this problem, the effect of the acidity of feed and the concentration of lactic acid on the distribution ratio, separation coefficient and extraction capacity were investigated in unsaponified D2EHPA -HCl-LA system，and the regression equations were calculated in this paper. The results showed that the distribution ratio and separation coefficient both increased with decreasing of feed acidity and increasing of the lactic acid concentration, and the extraction capacity increased with increasing of lactic acid concentration in D2EHPA -HCl-LA system. When the feed acidity pH=3.5 and lactic acid concentration was 0.3mol/L, the max separation coefficient was 1.57, and the extraction capacity was 27.87g/L.

Keywords:extraction of rare earth; coordination extraction; distribution ratio; separation coefficient

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