Selective leaching of a mixed nickel-cobalt hydroxide precipitate in sulphuric acid solution with potassium permanganate as oxidant

Hussaini, Shokrullah; Ichlas, Zela Tanlega; Top, Soner; Kurşunoğlu, Sait; Kaya, Muammer

doi:10.1080/01496395.2020.1832523

Cited by 3 publications

(5 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The process of Mn(II) oxidation with the addition of a strong oxidant has been widely employed in water business for an extended period. According to our previous study [2], potassium permanganate has a significant effect on Mn precipitation from the sulfate leach solution [2]. To the best of our knowledge, previous research was only carried out in metal sulfate media.…”

Section: Effect Of Oxidants On Metal Dissolutionmentioning

confidence: 98%

“…The detailed material characterization is reported in a previously published work [2]. Some highlights are provided here.…”

Section: Materials Characterizationmentioning

confidence: 99%

“…In this study, we investigated the effects of oxidants on selective metal dissolution in a citrate acid leach media. Potassium permanganate and hydrogen peroxide were selected as the oxidants based on our previous study [2].…”

Section: Effect Of Oxidants On Metal Dissolutionmentioning

confidence: 99%

“…Hydrometallurgy and pyrometallurgy are the two primary treatment methods for laterite ores. Pyrometallurgy is also largely employed in the treatment of nickel sulfide ores and saprolitic laterite nickel ores [1,2].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Leaching of Nickel and Cobalt from a Mixed Nickel-Cobalt Hydroxide Precipitate Using Organic Acids

Hussaini,

Tita,

Kursunoglu

et al. 2024

Minerals

Self Cite

View full text Add to dashboard Cite

Nickel (Ni) and cobalt (Co) are strategic metals that have found applications in a wide range of metallurgical and industrial uses. In this study, the dissolution of a mixed nickel–cobalt hydroxide precipitate using organic acids (citric, oxalic, and malic acid) was investigated. Citric acid was found to be the best leaching agent yielding the following dissolution rates: 91.2% Ni, 86.8% Co, and 90.8% Mn. Oxalic acid resulted in low dissolution, which is likely due to the formation of insoluble metal oxalates. The impact of acid concentration, leaching time, and temperature on metal dissolution was systematically examined. The optimal dissolution conditions were identified as 0.5 M citric acid at 30 °C for 30 min, utilizing a 1/20 solid/liquid ratio and a stirring speed of 400 revolutions per minute (rpm). The attempt to use oxidants, such as potassium permanganate (KMnO4) and hydrogen peroxide (H2O2), to achieve selective dissolution in an organic acid environment was not successful, which was different from that in the sulfuric acid case. As for the leaching kinetics in the organic acids, it seems that the leaching of Ni correlates with the Shrinking Core Model, specifically regarding porous-layer diffusion control. Based on the experimental results, the activation energy for the leaching of Ni was estimated to be 3.1 kJ/mol.

show abstract

Section: Effect Of Oxidants On Metal Dissolutionmentioning

confidence: 98%

“…The detailed material characterization is reported in a previously published work [2]. Some highlights are provided here.…”

Section: Materials Characterizationmentioning

confidence: 99%

Section: Effect Of Oxidants On Metal Dissolutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Leaching of Nickel and Cobalt from a Mixed Nickel-Cobalt Hydroxide Precipitate Using Organic Acids

Hussaini,

Tita,

Kursunoglu

et al. 2024

Minerals

Self Cite

View full text Add to dashboard Cite

show abstract

“…The PLS is then processed by precipitation method to produce the final product, generally in the form of a MHP (mixture of hydroxide precipitate) or a MSP (mixture of sulfide precipitation). The PLS from the leaching process could also be processed before the precipitation process via a solvent extraction route to separate the dissolved metal into a different solution to produce higher-purity PLS [5]- [6]. MHP is a commercially proven technique [7]; MHP has a nickel content of around 3,8%-34%, while MSP is about 55%.…”

Section: Introductionmentioning

confidence: 99%

Iron Removal Process From Nickel Pregnant Leach Solution Using Sodium Hydroxide

Zunaidi

Setiawan

Oediyani

et al. 2022

metal.

View full text Add to dashboard Cite

Indonesia is a country that has abundant mineral resources, including nickel resources in laterite ore. Nickel demand has risen significantly because of the need for nickel precursors for battery production. Nickel laterite can be processed via the hydrometallurgical route to obtain nickel precursor by leaching the laterite ore with an acid solution to produce a nickel-rich solution or Pregnant Leach Solutions (PLS). This nickel-rich solution is then processed by precipitation with a base solution to make its hydroxides known as Mixed Hydroxides Precipitate (MHP). MHP is the main product that contains nickel and cobalt for making the material for a lithium battery. PLS usually contain iron impurity, which also dissolves when the ore is leached. Therefore, the iron needs to be separated to make high-purity MHP. To solve this problem, synthetic PLS contained nickel, cobalt, and iron, and their concentration was simulated to match the general PLS composition. From the experiment, it was observed that iron could be precipitated at two stages at solution pH of 3 and 3.5 using 2.5 M NaOH solution. After that, nickel and cobalt can be precipitated at higher pH. To study the effect of pH and temperature on the yield of nickel and cobalt precipitation, precipitation at pH of 7, 8, and 9; and temperature of 70, 80, and 90 °C was conducted. The results show that the highest yield was obtained at a pH of 9 and temperature of 90 °C, with precipitation yield of nickel and cobalt at 99.03% and 98.78%, respectively.

show abstract

Enhanced Nickel Recovery from Mixed Hydroxide Precipitate Through Selective Leaching with KMnO4 Oxidant

Gumelar,

Rahayu,

Saputra

et al. 2024

Jurnal Sains Materi Indonesia

View full text Add to dashboard Cite

Mixed Hydroxide Precipitate (MHP), a metal precipitate with the dominant nickel and cobalt content in hydroxide compounds, can be leached as a lithium battery precursor. In this study, KMnO4 was used as an oxidant agent to increase the solubility of Ni and Co. The variation of the sulfuric acid concentration (0.5 - 1.5 M) as a leachate reagent, the concentration of KMnO4 (2.5 - 7.5 g/L), and the selective leaching temperature (60 - 80°C) were investigated. Solvent extraction using CYANEX 272 and D2EHPA was performed to separate the Ni, Co, and Mn. Atomic Absorption Spectrometry (AAS), Inductively coupled plasma mass (ICP-OES), and X-ray Fluorescence (XRF) were used to analyze the chemical compositions. At the same time, crystallographic analysis was observed with X-Ray Diffraction. It was observed that potassium permanganate increased the dissolution of Ni and Co to 91.3% and 85.4% but decreased the dissolution of Mn (37.53%) under the following conditions: 1.75 M sulfuric acid, 7.5 g/L potassium permanganate, and 60°C temperature. High purity of nickel crystal (99.64%) was observed with spontaneous nucleation due to the supersaturated nickel solution after solvent extraction with CYANEX 272. Thus, using permanganate ion as selective leaching of Ni and Co from Mn is promising.

show abstract

Selective leaching of a mixed nickel-cobalt hydroxide precipitate in sulphuric acid solution with potassium permanganate as oxidant

Cited by 3 publications

References 12 publications

Leaching of Nickel and Cobalt from a Mixed Nickel-Cobalt Hydroxide Precipitate Using Organic Acids

Leaching of Nickel and Cobalt from a Mixed Nickel-Cobalt Hydroxide Precipitate Using Organic Acids

Iron Removal Process From Nickel Pregnant Leach Solution Using Sodium Hydroxide

Enhanced Nickel Recovery from Mixed Hydroxide Precipitate Through Selective Leaching with KMnO4 Oxidant

Contact Info

Product

Resources

About