Abstract
Abstract Solvent extraction experiments have been performed to separate Nd and Pr from chloride leaching solution of monazite sandusing single Cyanex272 and mixed extractants as PC88A+Cyanex272 and PC88A+TBP. For this purpose, the effect of the con-centration of extractants on the extraction and separation of the two metals were studied by varying the pH of aqueous solution.In the experimental ranges conducted in this study, the distribution coefficients of Nd were higher than those of Pr. In Cyanex272system, our results indicated that concentration of extractant and initial pH did not affect distribution coefficients, but separationfactor was increased with increasing initial pH. In binary extractant system, distribution coefficients were lower than those ofsingle PC88A system, whereas separation factor was similar in both mixed and single extractant system.Key words : solvent extraction, Cyanex272, NdCl 3 , PrCl 3 , separation * Received : February 4, 2014 · Revised : March 5, 2014 · Accepted : March 18, 2014Corresponding Author : Man-Seung Lee (E-mail : mslee@mokpo.ac.kr)Department of Advanced Materials Science & Engineering, Mokpo National University, 61 Dorim-ri, Chungkye-myun, Muan-gun,Chonnam, 534-729, KoreaTel : +82-62-450-2492 / Fax : +82-62-450-2498 ⓒThe Korean Institute of Resources Recycling. All rights reserved. This is an open-access article distributed under the termsof the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permitsunrestricted non-commercial use, distribution and reproduction in any medium, provided the original work is properly cited.
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