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Separation of Tb(III) and Dy(III) from Chloride Solution by Extraction and Scrubbing with Ionic Liquid Prepared with Cyanex 272 and Aliquat 336
Cyanex 272와 Aliquat 336으로 제조한 이온성액체로 염산용액에서 추출과 세정에 의한 터븀(III) 및 디스프로슘(III)의 분리
Chang Geun Oh, Seong Ho Son, Man Seung Lee
오창근, 손성호, 이만승
Korean J. Met. Mater. 2019;57(8):499-505.   Published online 2019 Jul 8
DOI: https://doi.org/10.3365/KJMM.2019.57.8.499

Abstract
Terbium and dysprosium are rare earth elements which are employed in the manufacture of advanced materials. Separating Tb(III) and Dy(III) is very complicated because their chemical properties are similar. In order to develop a separation process based on solvent extraction, extraction and scrubbing experiments were conducted using weak hydrochloric solutions..... More

                        
Diluents Role in Extraction and Possible Separation of Light Rare Earth Elements from Chloride Solutions by using Cyanex<sup></sup> 272 used as an Extractant
Rajesh Kumar Jyothi, Hae-Rim Kim, Joon Soo Kim, Kyeong-Woo Chung, Jin-Young Lee
Korean J. Met. Mater. 2018;56(10):763-771.   Published online 2018 Oct 5
DOI: https://doi.org/10.3365/KJMM.2018.56.10.763

Abstract
The present paper deals with liquid-liquid extraction studies and the possible separation of light rare earths (LREs) from chloride solutions. Aromatic diluents such as benzene, toluene and xylene were tested for LREs extraction and possible separation from chloride solutions. Bis(2,4,4-triethylpentyl)phosphinic acid (trade name Cyanex® 272) was used as an extractant..... More

                        
Comparison of Counter Current Extraction Process of Pr & Nd Separation using Cyanex 572 and PC88A
Cyanex 572와 PC88A를 사용하여 Pr 및 Nd 분리 시 향류추출 공정 비교
Joo-eun Lee, Hong-Il So, Yeon-Chul Cho, Jae-Woo Ahn, Hong-in Kim, Jin-young Lee
이주은, 소홍일, 조연철, 안재우, 김홍인, 이진영
Korean J. Met. Mater. 2018;56(8):597-604.   Published online 2018 Aug 5
DOI: https://doi.org/10.3365/KJMM.2018.56.8.597

Abstract
This study designed a counter current extraction process for comparing the separation efficiencies that are obtained using Cyanex 572 and PC88A for the elements in a Pr and Nd mixed solution. This process involves multiple extraction and scrubbing processes using a mixer settler. The process parameters are calculated using an..... More

                        
Comparison of the Extraction and Separation Behavior of La, Ce, Pr, Nd, Sm from Light Rare Earth Mixed Solutions by PC88A and Cyanex 572
경희토류 혼합용액에서 PC88A와 Cyanex 572에 의한 La, Ce, Pr, Nd, Sm의 추출·분리 거동 비교
Yeon-Chul Cho, Joo-eun Lee, Hong-Il So, Jae-Woo Ahn, Hong-in Kim, Jin-young Lee
조연철, 이주은, 소홍일, 안재우, 김홍인, 이진영
Korean J. Met. Mater. 2018;56(2):146-154.   Published online 2018 Feb 5
DOI: https://doi.org/10.3365/KJMM.2018.56.2.146

Abstract
Solvent extraction of La, Ce, Pr, Nd and Sm from chloride solutions was studied using PC88A and Cyanex 572 as the extractants. Our results indicated that the acidity of the aqueous solution and saponification degree had some effect on the percentage extraction of metal ions. The distribution coefficient of the..... More

      
Separation of Rhenium (VII) and Vanadium (V) from Hydrochloric Acid Solutions by Solvent Extraction
Thi Hong Nguyen, Hoai Thanh Truong, Man Seung Lee
Korean J. Met. Mater. 2017;55(10):724-731.   Published online 2017 Sep 28
DOI: https://doi.org/10.3365/KJMM.2017.55.10.724

Abstract
The separation of Re(VII) and V(V) by solvent extraction with TBP was investigated by varying the HCl, metal and chloride ion concentrations. Re(VII) was selectively extracted over V(V) from the HCl solution. The highest separation between Re(VII) and V(V) occurred at a concentration of 2.0 M HCl. The extraction reaction..... More

      
Separation and Recovery of Precious Metals from Leach Liquors of Spent Electronic Wastes by Solvent Extraction
Thi Hong Nguyen, Lingyun Wang, Man Seung Lee
Korean J. Met. Mater. 2017;55(4):247-255.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.247

Abstract
Solvent extraction was employed to recover precious metals (Au (III), Pd (II) and Pt (IV)) from the leach solution of spent electronic wastes containing Cu (II), Cr (III) and Fe (III). First, pure Fe (III) and Au (III) were recovered by simultaneous extraction with Cyanex 923 followed by selective stripping..... More

         Cited By 6
Effect of HCl Concentration on the Oxidation of LIX 63 and the Subsequent Separation of Pd(II), Pt(IV), Ir(IV) and Rh(III) by Solvent Extraction
Thi Hong Nguyen, Man Seung Lee
Korean J. Met. Mater. 2016;54(10):768-774.   Published online 2016 Oct 5
DOI: https://doi.org/10.3365/KJMM.2016.54.10.768

Abstract
During the selective extraction of Pd(II) by LIX 63 from 6 M HCl solutions containing platinum group metals, an oxidation-reduction reaction occurs between the LIX 63 and Ir(IV). Since the reduced Ir(III) cannot be extracted by solvating and amine extractants, the oxidation-reduction reaction has a significant effect on the separation..... More

         Cited By 6
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