Separation of Metal Values from Sulfuric Acid Leach Solution of Manganese Nodule

H2SO4 was ensured to be the best candidate for Zr leaching from the eudialyte. The resulting sulfuric leach solution consisted of Zr(IV), Nb(V), Hf(IV), Al(III), and Fe(III). It was found that ordinary metal hydroxide precipitation was not feasible for obtaining a relatively pure product due to the co-precipitation of Al(III) and Fe(III). In this reported study, a basic zirconium sulfate precipitation method was investigated to recover Zr from a sulfuric acid leach solution of a eudialyte residue after rare earth elements extraction. Nb precipitated preferentially by adjusting the pH of the solution to around 1.0. After partial removal of SO42− by adding 120 g of CaCl2 per 1L solution, a basic zirconium sulfate precipitate was obtained by adjusting the pH to ~1.6 and maintaining the solution at 75 °C for 60 min. Under the optimum conditions, the loss of Zr during the SO42− removal step was only 0.11%, and the yield in the basic zirconium sulfate precipitation step was 96.18%. The precipitate contained 33.77% Zr and 0.59% Hf with low concentrations of Fe and Al. It was found that a high-quality product of ZrO2 could be obtained from the basic sulfate precipitate.

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Sustainable Hydrometallurgical Recovery of Valuable Elements from Spent Nickel–Metal Hydride HEV Batteries

Metals ◽

10.3390/met8121062 ◽

2018 ◽

Vol 8 (12) ◽

pp. 1062 ◽

Cited By ~ 9

Author(s):

Kivanc Korkmaz ◽

Mahmood Alemrajabi ◽

Åke Rasmuson ◽

Kerstin Forsberg

Keyword(s):

Sulfuric Acid ◽

Hydrochloric Acid ◽

Hybrid Electric Vehicle ◽

Active Material ◽

Sulfuric Acid Concentration ◽

Dissolution Kinetics ◽

Leach Solution ◽

Nickel Metal ◽

Acid Leach ◽

Kinetics Of

In the present study, the recovery of valuable metals from a Panasonic Prismatic Module 6.5 Ah NiMH 7.2 V plastic casing hybrid electric vehicle (HEV) battery has been investigated, processing the anode and cathode electrodes separately. The study focuses on the recovery of the most valuable compounds, i.e., nickel, cobalt and rare earth elements (REE). Most of the REE (La, Ce, Nd, Pr and Y) were found in the anode active material (33% by mass), whereas only a small amount of Y was found in the cathode material. The electrodes were leached in sulfuric acid and in hydrochloric acid, respectively, under different conditions. The results indicated that the dissolution kinetics of nickel could be slow as a result of slow dissolution kinetics of nickel oxide. At leaching in sulfuric acid, light rare earths were found to reprecipitate increasingly with increasing temperature and sulfuric acid concentration. Following the leaching, the separation of REE from the sulfuric acid leach liquor by precipitation as NaREE (SO4)2·H2O and from the hydrochloric acid leach solution as REE2(C2O4)3·xH2O were investigated. By adding sodium ions, the REE could be precipitated as NaREE (SO4)2·H2O with little loss of Co and Ni. By using a stoichiometric oxalic acid excess of 300%, the REE could be precipitated as oxalates while avoiding nickel and cobalt co-precipitation. By using nanofiltration it was possible to recover hydrochloric acid after leaching the anode material.

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Recovery of molybdenum and vanadium with high purity from sulfuric acid leach solution of spent hydrodesulfurization catalysts by ion exchange

Hydrometallurgy ◽

10.1016/j.hydromet.2014.05.010 ◽

2014 ◽

Vol 147-148 ◽

pp. 142-147 ◽

Cited By ~ 26

Author(s):

Thi Hong Nguyen ◽

Man Seung Lee

Keyword(s):

Sulfuric Acid ◽

Ion Exchange ◽

High Purity ◽

Leach Solution ◽

Hydrodesulfurization Catalysts ◽

Acid Leach

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Selective recovery and separation of Zr and Hf from sulfuric acid leach solution using anion exchange resin

Hydrometallurgy ◽

10.1016/j.hydromet.2019.105143 ◽

2019 ◽

Vol 189 ◽

pp. 105143 ◽

Cited By ~ 3

Author(s):

Yiqian Ma ◽

Srecko Stopic ◽

Zizhao Huang ◽

Bernd Friedrich

Keyword(s):

Sulfuric Acid ◽

Anion Exchange ◽

Exchange Resin ◽

Anion Exchange Resin ◽

Leach Solution ◽

Selective Recovery ◽

Acid Leach

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Cooperative influence of D2EHPA and TBP on the reactive extraction of cobalt from sulfuric acid leach solution in a horizontal semi-industrial column

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2017.08.044 ◽

2017 ◽

Vol 5 (5) ◽

pp. 4716-4727 ◽

Cited By ~ 7

Author(s):

Pouria Amani ◽

Javad Asadi ◽

Elham Mohammadi ◽

Sahar Akhgar ◽

Mohammad Esmaili

Keyword(s):

Sulfuric Acid ◽

Leach Solution ◽

Reactive Extraction ◽

Acid Leach

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Preliminary Study on Gold Recovery from High Grade E-Waste by Thiourea Leaching and Electrowinning

Minerals ◽

10.3390/min11030235 ◽

2021 ◽

Vol 11 (3) ◽

pp. 235

Author(s):

Nicolò Maria Ippolito ◽

Ionela Birloaga ◽

Francesco Ferella ◽

Marcello Centofanti ◽

Francesco Vegliò

Keyword(s):

Sulfuric Acid ◽

Leach Solution ◽

High Grade ◽

Gold Dissolution ◽

Plastic Part ◽

The Third ◽

Current Consumption ◽

Different Types ◽

Preliminary Study ◽

A Current

The present paper is focused on the extraction of gold from high-grade e-waste, i.e., spent electronic connectors and plates, by leaching and electrowinning. These connectors are usually made up of an alloy covered by a layer of gold; sometimes, in some of them, a plastic part is also present. The applied leaching system consisted of an acid solution of diluted sulfuric acid (0.2 mol/L) with thiourea (20 g/L) as a reagent and ferric sulfate (21.8 g/L) as an oxidant. This system was applied on three different high-grade e-waste, namely: (1) Connectors with the partial gold-plated surface (Au concentration—1139 mg/kg); (2) different types of connectors with some of which with completely gold-plated surface (Au concentration—590 mg/kg); and (3) connectors and plates with the completely gold-plated surface (Au concentration—7900 mg/kg). Gold dissolution yields of 52, 94, and 49% were achieved from the first, second, and third samples, respectively. About 95% of Au recovery was achieved after 1.5 h of electrowinning at a current efficiency of only 4.06% and current consumption of 3.02 kWh/kg of Au from the leach solution of the third sample.

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Selective solvent extraction of vanadium over iron from a stone coal/black shale acid leach solution by D2EHPA/TBP

Hydrometallurgy ◽

10.1016/j.hydromet.2010.10.006 ◽

2011 ◽

Vol 105 (3-4) ◽

pp. 359-363 ◽

Cited By ~ 97

Author(s):

Xingbin Li ◽

Chang Wei ◽

Zhigan Deng ◽

Minting Li ◽

Cunxiong Li ◽

...

Keyword(s):

Solvent Extraction ◽

Black Shale ◽

Leach Solution ◽

Selective Solvent ◽

Stone Coal ◽

Acid Leach ◽

Selective Solvent Extraction

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Uranium Bioleaching from Low Grade Ore

Materials Science Forum ◽

10.4028/www.scientific.net/msf.989.559 ◽

2020 ◽

Vol 989 ◽

pp. 559-563

Author(s):

Ashimkhan T. Kanayev ◽

Khussain Valiyev ◽

Aleksandr Bulaev

Keyword(s):

Sulfuric Acid ◽

Acid Mine Drainage ◽

Mine Drainage ◽

Sulfuric Acid Concentration ◽

Acid Leaching ◽

Leach Solution ◽

Low Grade ◽

Bacterial Cells ◽

Acid Mine

The goal of the present work was to perform bioleaching of uranium from low grade ore from Vostok deposit (Republic of Kazakhstan), which was previously subjected to long-term acid leaching. The ore initially contained from 0.15 to 0.20% of uranium in the form of uraninite, but ore samples used in the study contained about 0.05% of uranium, as it was exhausted during acid leaching, and uranium was partially leached. Representative samples of ore were processed in 1 m columns, leach solutions containing 5, 10, 20 g/L of sulfuric acid and bacterial cells (about 104) were percolated through the ore. Leaching was performed at ambient temperature for 70 days. In one of the percolators, the leaching was performed with leaching solution containing 10 g/L of H2SO4, cells of A. ferrooxidans, and 0.5 g/L of formaldehyde. Leaching with the solution containing 5, 10, and 20 g/L of sulfuric acid made it possible to extract 50, 53, and 58% of uranium. Addition of formaldehyde in leach solution led to the decrease in uranium extraction extent down to 37%. Thus, the results of the present work demonstrated that uranium ore exhausted during long-term acid leaching may be successfully subjected to bioleaching, that allows extracting residual quantities of uranium. Leaching rate of uranium from exhausted ore depended on both sulfuric acid concentration and microbial activity of bacteria isolated from acid mine drainage, formed on uranium deposit. In the same time, acid mine drainage may be used as a source of inoculate, to start bioleaching process.

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