Solvent Extraction of Sm from Chloride Solution with PC88A and Saponified PC88A

Lee, Man Seung; Lee, Gwang-Seop; Lee, Jin Young; Kim, Sung-Don; Kim, Joon-Soo

doi:10.2320/matertrans.46.64

Cited by 15 publications

(9 citation statements)

References 11 publications

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“…Compared to D2EHPA, PC88A is preferred for separating rare earth elements due to its high separation factor and high loading capacity [46], [47]. Thakur studied the extraction characteristics of the base metals Mn, Cu, Co and Ni by using the extractant 2-ethylhexyl phosphonic acid (PC 88A).…”

Section: Pc-88a Acid Extractantmentioning

confidence: 99%

Electrorefining of high purity manganese

et al. 2017

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Manganese is an important industrial metal used as an additive for production of various steels, non-ferrous alloys, electronic components and special chemicals. The traditional electrowinning process is not suitable for the production of high-purity manganese. Therefore, a novel ion exchange -electrorefining process for production of high-purity manganese is proposed to solve the problems.The ammonium chloride -manganese chloride electrolyte was selected as the most promising for refining. The physical properties of the electrolyte were first studied. The density increases when increasing concentrations of the ammonium chloride and manganese chloride. The maximum electrical conductivity is obtained with high concentrations of ammonium chloride and high temperature. Viscosity is minimized by high temperature and by low concentrations of manganese chloride.The electrorefining process introduces impurities into the anolyte from the dissolving anode. The purification of the electrolyte by cementation and ion exchange were investigated. This thesis reports the uptake of copper, nickel, cobalt, cadmium, zinc and manganese from manganese chloride solution onto the chelating resin Lewatit® MDS TP220 and Purolite S930Plus in batch and column experiments. The results demonstrate the ability for Lewatit® MDS TP220 to remove contaminants to an extent satisfying the quality criteria required for electrorefining. However, cementation of impurities by manganese powder and ion exchange with PuroliteS930Plus are not suitable for purification to satisfy the quality criteria.iii In the electrorefining process, the individual and synergistic effects of selected impurities on manganese deposit quality were first investigated. The purity of manganese deposit did not change significantly in the presence of impurities. An addition of 0.15-5.0 mg/l Zn 2+ to the catholyte increases the cathodic current efficiency. The parameters of current density, deposition time, and cathode usage frequency were investigated. Current density, deposition time and cathode usage frequency could affect current efficiency, specific energy consumption and surface morphology. With increasing the current density, the cathodic current efficiency first increased, reached a maximum value and then decreased. With increasing deposition time from 24 hours to 48 hours, the manganese current efficiency decreased and the deposit became more dendritic. The more times the cathode was used, the lower the current efficiency.iv

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Section: Pc-88a Acid Extractantmentioning

confidence: 99%

Electrorefining of high purity manganese

et al. 2017

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“…Acidic organophosphorous extractants such as D2EHPA and PC88A are widely used in the separation processes (Harada et al, 1971;Hoh and Bautista, 1979;Ioannou et al, 1972). Of these two extractants, PC88A is known to have a higher loading capacity and to yield higher separation factors (Lee et al, 2005). These acidic extractants have been widely used in the rare earth industry for the separation and purification (Preston and du Preez, 1990;Reddy et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Studies on extraction and separation of La(III) with DEHPA and PC88A in petrofin

Acharya

Mishra

Misra³

2015

Hydrometallurgy

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“…Besides precipitation, several studies on solvent extraction as an effective route for separation of Sm were reported. − Processing of a SmCo magnet for recovery of Sm and Co, and separation of Sm using CYANEX 572 from chloride leach liquor, was reported . The authors demagnetized the waste magnet by roasting at 1123 K prior to leaching with 4 M HCl at 368 K under 100 g/L S:L. Precipitated Sm and Co oxalates were calcined to produce oxides of Sm and Co.…”

Section: Introductionmentioning

confidence: 99%

“…The stripping efficiencies with HNO 3 , HCl, and CH 3 COOH as well as the thermodynamic functions of extraction were established. In continuation of Sm extraction from synthetic solution, Lee et al investigated the extraction of Sm from SmCl 3 solution using PC88A and saponified PC88A . The study involved estimation of equilibrium constants for both PC88A and saponified PC88A by analyzing ionic equilibria and prediction of distribution coefficients by developing a chemical model.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies on the recovery of Sm mostly reported the recovery from the bastnasite, SmCo 5 magnet, ,, and simulated or equivalent Sm 2 Co 17 magnet scraps. The studies are either limited to leaching studies, and the downstream processing routes are through solvent extraction , or solvometallurgical approach or by using ILs. − The transition elements were not being addressed or left as such in the solution after the recovery of Sm. The present study involves complete flowsheet development with end-to-end processing of Sm 2 Co 17 magnet scrap through the hydrometallurgical route to recover Sm as well as other co-existing transition metals.…”

Section: Introductionmentioning

confidence: 99%

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Process Flowsheet Development for Separation of Sm, Co, Cu, and Fe from Magnet Scrap

et al. 2020

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A complete process flowsheet to recover metal values from Sm2Co17-type magnet scrap was investigated. The magnet scrap was leached in chloride medium at pulp density of 2% (w/v) under the optimum conditions of 15% (v/v) HCl and 5% (v/v) H2O2 at 70 °C for 3 h, which yielded 98.5% Sm and 99% Co extractions. The full factorial Design of Experiment technique was adopted for the optimization of leaching conditions. Sm was selectively separated from the leach liquor as precipitated double salt using Na2SO4. The precipitated double sulfate was later converted to Sm-oxalate, which was subsequently calcined to produce pure Sm2O3. Following Sm separation, Fe was removed through precipitation by raising the pH to 3.0. For Cu and Co recovery, solvent extraction techniques using LIX 84I and Na-CYANEX 272, respectively, were followed. The McCabe–Thiele diagrams for extraction as well as stripping were presented for both Cu and Co.

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Solvent Extraction of Sm from Chloride Solution with PC88A and Saponified PC88A

Cited by 15 publications

References 11 publications

Electrorefining of high purity manganese

Electrorefining of high purity manganese

Studies on extraction and separation of La(III) with DEHPA and PC88A in petrofin

Process Flowsheet Development for Separation of Sm, Co, Cu, and Fe from Magnet Scrap

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