• Title/Summary/Keyword: Cyanex301

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Solvent Extraction of Zirconium and Hafnium from Hydrochloric Acid solution by LIX 63 and Cyanex 301 (염산용액(鹽酸溶液)에서 LIX 63 및 Cyanex 301에 의한 지르코늄과 하프늄의 용매추출(溶媒抽出))

  • Min, Soo-Hwan;Lee, Man-Seung
    • Resources Recycling
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    • v.22 no.6
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    • pp.19-25
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    • 2013
  • Solvent extraction experiments have been conducted to separate Zr(IV) and Hf(IV) from chloride solutions by using LIX63 and Cyanex301. Zr and Hf were extracted by cation exchange reaction in the pH range from 1 to 4 by the extratants. Since the extraction percentage of the two metals was similar to each other, it was difficult to separate the two metals by using LIX63 or Cyanex301. Use of a mixture of LIX63/TBP or Cyanex301/TBP resulted in antagonism in our experimental ranges. Our data showed that there is some possibility of separating the two metals by the mixture of Cyanex301 and TBP because the extraction percentage of Hf decreased more rapidly than that of Zr as HCl concentration was decreased. The mixture of LIX63 and Cyanex301 had little effect on the separation of the two metals.

Mutual Separation of Am(III) and Eu(III) by Solvent Extraction with Cyanex 301 (Cyanex 301에 의한 Am(III)과 Eu(III)의 상호분리)

  • Yang, Han-Beom;Lim, Jae-Gwan;Lee, Eil-Hee;Yoo, Jae-Hyung
    • Applied Chemistry for Engineering
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    • v.10 no.1
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    • pp.143-147
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    • 1999
  • The present paper describes the solvent extraction behaviors and the mutual separation of Am and Eu by sulphur bearing Cyanex 301 acidic extractant in sodium nitrate solutions. Original Cyanex 301 was not able to separate the Am and Eu because of their similar extraction behaviors. The saponification of commercial Cyanex 301 was performed by small amounts of 8 M NaOH solutions and saponified Cyanex 301 was able to separate of Am from Eu with high selectivity in sodium nitrate aqueous solution. The separation factors ($SF_{Am/Eu}$) were increased with saponified ratio of commercial Cyanex 301, pH of sodium nitrate solution and initial concentration of Eu. To obtain the homogeneous saponified Cyanex 301, heterogeneous saponified Cyanex 301 was treated with addition of octyl alcohol or filtration. The observed $SF_{Am/Eu}$ was 32.3 for the former and 930 for the latter. Finally, the stripping behaviors of Am and Eu were similar and stripping yields showed 96.1% for the 1 M $NaNO_3$(pH=1.3) and 99% for the mixture solution of 0.05 M DTPA and 1.5 M lactic acid.

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Cyanex 301 추출제에 의한 Am(III)과 Eu(III)의 상호분리

  • 양한범;임재관;이일희;유재형
    • Proceedings of the Korean Nuclear Society Conference
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    • 1998.05b
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    • pp.533-538
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    • 1998
  • 추출제 Cyanex 301에 대한 NaN $O_3$ 매질에서 Am과 Eu의 추출 및 상호분리 거동에 대해 고찰하였다. Cyanex 301에 대한 Am과 Eu의 추출거동은 매우 유사하여 상호 분리할 수 없었으나 Cyanex 301을 8M NaOH로 비누화 처리하여 NaN $O_3$ 용액 매질에서 Eu에 대한 미량의 Am의 분배계수를 측정한 결과 Am에 대한 선택적 추출성이 높게 나타났다. Cyanex 301의 비누화을, 수용상의 pH 및 Eu 농도가 높아질수록 Am과 Eu의 상호 분리계수인 S $F_{AM}$Eu/는 930까지 증가되었으나 Cyanex 301에 옥탄올을 첨가할 경우에는 S $F_{Am}$ Eu/는 32.3까지 감소하였으며, Am과 Eu의 추출에 미치는 NaN $O_3$ 농도 영향은 없는 것으로 나타났다. Cyanex 301에 추출된 Am과 Eu은 pH가 4인 lM NaN $O_3$ 용액으로는 97.7% 그리고 0.05M DTPA/1.5M Lactic acid에 의해서 99% 이상 역추출되었다.

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Solvent Extraction of Silver (Ag) by Cyanex 301 (Cyanex 301에 의한 은(Ag) 용매추출)

  • Cho, Yeon-Chul;Kang, Myeong-Sik;Ahn, Jae-Woo;Ryu, Ho-jin
    • Resources Recycling
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    • v.25 no.5
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    • pp.50-56
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    • 2016
  • Extraction behaviour of silver from nitric acid solutions by Cyanex 301 as an extractant was examined. Detailed studies have been conducted to evaluate the effect of different variables influencing the extraction such as concentration of nitric acid and extractant, phase ratio(O/A) and synergism of mixed extractant. The extraction behaviour of associated metals namely Ca, Al, Fe, Zn and Sr has been investigated. The extraction results show that Ag can be extracted effectively by Cyanex 301 and selectively extracted from 3.0M $HNO_3$ using 5% Cyanex 301. Impurity metals loaded in organic phase can be effective scrubbed by 4.0M HCl. Finally, pure silver solution can be obtained efficiently by thiourea as a stripping reagent.

Solvent Extraction of Zr(IV) and Hf(IV) from Sulfuric Acid Solutions by Acidic Extractants and Their Mixtures with TBP (황산용액에서 양이온계 추출제 및 TBP와의 혼합추출제에 의한 지르코늄(IV)과 하프늄(IV)의 용매추출)

  • Wang, Ling Yun;Lee, Man Seung
    • Resources Recycling
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    • v.25 no.2
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    • pp.3-9
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    • 2016
  • Separation of Zr(IV) and Hf(IV) from sulfuric acid solutions was investigated by extraction with several acidic extractants such as Versatic acid, LIX 63, and Cyanex 301. From strong sulfuric acid solutions, the separation of Zr(IV) and Hf(IV) by Versatic acid and LIX 63 was not possible, while selective extraction of Hf(IV) over Zr(IV) was obtained with Cyanex 301. However, the extraction percentage of the two metals was much lower compared to that by D2EHPA. Mixing of TBP with Cyanex 301 and D2EHPA led to negative effect on the extraction and separation of the two metal ions. The difference in the extraction reaction and separation selectivity between HCl, $HNO_3$ and $H_2SO_4$ media with each extractant was discussed.

Recovery of Co and Ni from Strong Acidic Solution by Cyanex 301 (강산성용액에서 Cyanex 301에 의한 Co 및 Ni 회수 연구)

  • Cho, Yeon-Chul;Kim, Ki-Hun;Ahn, Jae-Woo
    • Resources Recycling
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    • v.30 no.6
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    • pp.28-35
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    • 2021
  • An experiment was conducted to separate or recover Co and Ni using Cyanex 301 from process by-products and waste resources containing Co and Ni. To separate and recover Co and Ni from simulated leaching solutions, 10 v/v% Cyanex 301 was used as an extractant in this study; Li was not extracted. At equilibrium pH 1.5 and a phase ratio (A/O) of 1.0, 0.44% of Mg and 11.57% of Mn were extracted, and more than 99% of Co and Ni were extracted. McCabe-Thiele diagram analysis confirmed that more than 99.9% of Co and Ni could be extracted simultaneously through two-stage extraction with an extraction phase ratio (A/O) of 2. It was possible to extract Mg and Mn simultaneously through the scrubbing process. In the scrubbing process, more than 99% of Mg and 87% of Mn were scrubbed using 0.05 M of H2SO4, and 99.9% of Mg and more than 80% of Mn were scrubbed using 0.05 M of HCl. In the stripping process, 93% of Co and 5% of Ni were stripped selectively by 3.0 M of H2SO4. However, when 8.0 M of HCl was used as a stripping solution, more than 99.9% of Co and more than 90% of Ni were stripped simultaneously.

Novel Method for Stripping of Molybdenum(VI) after Its Extraction with Cyanex 301

  • Saberyan, Kamal;Maragheh, Mohammad Ghannadi;Ganjali, Mohammad Reza
    • Bulletin of the Korean Chemical Society
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    • v.25 no.4
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    • pp.460-465
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    • 2004
  • Hydrofluoric acid has been used as a novel stripping agent for molybdenum(VI) after its extraction with Cyanex 301. In the extraction step, the effects of parameters such as type and initial concentration of acid, type of diluent, extractant concentration, metal concentration and temperature have been studied. In the stripping step, the effects of various stripping agents on stripping efficiency have been investigated. Hydrofluoric acid has been chosen as an effective stripping agent, and the effects of concentration of hydrofluoric acid, stripping time, volume of hydrofluoric acid and the number of stages of stripping have been studied. Molybdenum(VI) has been effectively separated from a large number of elements in binary mixtures, with a very high tolerance limit. Finally, the optimized method has been extended for the analysis of Mo(VI) in spent molybdenum catalysts.

A Modified Process for the Separation of Fe(III) and Cu(II) from the Sulfuric Acid Leaching Solution of Metallic Alloys of Reduction Smelted Spent Lithium-ion Batteries (폐리튬이온전지의 용융환원된 금속합금상의 황산침출액에서 철(III)과 구리(II)의 분리를 위한 공정 개선)

  • Nguyen, Thi Thu Huong;Tran, Thanh Tuan;Lee, Man Seung
    • Resources Recycling
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    • v.31 no.1
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    • pp.12-20
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    • 2022
  • The smelting reduction of spent lithium-ion batteries results in metallic alloys containing Co, Cu, Fe, Mn, Ni, and Si. A process to separate metal ions from the sulfuric acid leaching solution of these metallic alloys has been reported. In this process, ionic liquids are employed to separate Fe(III) and Cu(II). In this study, D2EHPA and Cyanex 301 were employed to replace these ionic liquids. Fe(III) and Cu(II) from the sulfate solution were sequentially extracted using 0.5 M D2EHPA with three stages of cross-current and 0.3 M Cyanex 301. The stripping of Fe(III) and Cu(II) from the loaded phases was performed using 50% (v/v) and 60% (v/v) aqua regia solutions, respectively. The mass balance results from this process indicated that the recovery and purity percentages of the metals were greater than 99%.

Solvent Extraction Separation of Co(II) and Ni(II) from Weak Hydrochloric Acid Solution with Ionic Liquids Synthesized from Organophosphorus Acids (유기인산계 추출제로 합성한 이온성액체에 의한 묽은 염산용액에서 코발트(II)와 니켈(II)의 추출분리)

  • Moon, Hyun Seung;Song, Si Jeong;Tran, Thanh Tuan;Lee, Man Seung
    • Resources Recycling
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    • v.29 no.5
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    • pp.55-63
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    • 2020
  • In order to investigate the separation of Co(II) and Ni(II) by ionic liquids from weak hydrochloric acid solutions, extraction experiments were performed by changing the type and concentration of ionic liquids and the initial pH of the aqueous phase. Two kinds of ionic liquids based on Aliquat 336 were employed in this work; one was synthesized by reacting organophosphorus acids(D2EHPA, PC88A, Cyanex 272, Cyanex 301) with Aliquat 336 and the other was prepared by exchanging the chloride ion of Aliquat 336 with SCN-. The three types of ionic liquids (ALi-D2, ALi-PC, and ALi-CY272) showed better extraction of Co(II) than Ni(II), and the equilibrium pH was higher than the initial pH. In the case of ALi-CY301, the selectivity of Co(II) and Ni(II) depended on the extraction conditions. In addition, the effect of the addition of TBP to the ionic liquid on the extraction of two metals was also investigated. Employment of ALi-SCN as an extractant resulted in selective extraction of Co(II) and complete separation of the two metal ions was possible.

Separation of Co(II), Ni(II), and Cu(II) from Sulfuric Acid Solution by Solvent Extraction (황산용액에서 용매추출에 의한 코발트(II), 니켈(II) 및 구리(II) 분리)

  • Moon, Hyun Seung;Song, Si Jeong;Tran, Thanh Tuan;Lee, Man Seung
    • Resources Recycling
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    • v.31 no.1
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    • pp.21-28
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    • 2022
  • The smelting reduction of spent lithium-ion batteries results in metallic alloys of cobalt, nickel, and copper. To develop a process to separate the metallic alloys, leaching of the metallic mixtures of these three metals with H2SO4 solution containing 3% H2O2 dissolved all the cobalt and nickel, together with 9.6% of the copper. Cyanex 301 selectively extracted Cu(II) from the leaching solution, and copper ions were completely stripped with 30% aqua regia. Selective extraction of Co(II) from a Cu(II)-free raffinate was possible using the ionic liquid ALi-SCN. Three-stage cross-current stripping of the loaded ALi-SCN by a 15% NH3 solution resulted in the complete stripping of Co(II). A process was proposed to separate the three metal ions from the sulfuric acid leaching solutions of metallic mixtures by employing solvent extraction.