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Yeon-Chul Cho 3 Articles
597 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

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

511 Leaching of Silver (Ag) from Electronic Scrap by Thiourea
전자스크랩으로부터 티오요소에 의한 은(Ag) 침출
Hong-Il So, Joo-eun Lee, Yeon-Chul Cho, Jae-Woo Ahn, Ho-Jin Ryu
소홍일, 이주은, 조연철, 안재우, 류호진
Korean J. Met. Mater. 2018;56(7):511-517.   Published online 2018 Jul 5
DOI: https://doi.org/10.3365/KJMM.2018.56.7.511

The leaching behavior of silver from electronic scrap using acidic thiourea solution was studied. The results showed that the silver leaching percentage was affected by the concentration of thiourea and hydrochloric acid, the oxidant such as ferric ions, solid-liquid ratio, temperature, rpm, etc. The leaching percentage of silver decreased with..... More

146 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

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

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