Solvent Extraction of Didymium by TBP, Aliquat 336 and HDEHP in The Presence of Ca(NO3)2

Applied Sciences

VladimirG. Petrov¹  PetrI. Matveev¹ 

[1] Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1, bld. 3, Moscow 119991, Russia;

关键词: rare earth elements;    solvent extraction;    separation;    neodymium;    praseodymium;    tbp;    hdehp;    aliquat 336;   

DOI  :  10.3390/app10062032

来源: DOAJ

【 摘 要 】

Three commercially available extractants (tri-butyl-phosphate (TBP), di-(2-ethylhexyl)phosphoric acid (HDEHP) and Aliquat 336 (a mixture of quaternary ammonium bases)) were tested for separation of Pr(III) and Nd(III) in both static and dynamic modes. In the case of HDEHP, phase stability and influence of nitric acid were considered. Extraction isotherms were constructed, and influence of water-soluble complexing agents on the separation factor was investigated for Aliquat 336. In the case of TBP, influence of calcium nitrate in aqueous phase on the extraction efficiency was investigated. Model countercurrent experiments were conducted for TBP and Aliquat 336. It was shown that TBP is the best choice due to its high capacity and cation extraction order (Nd > Pr).

【 授权许可】

Unknown