Options to recover high-purity MnO2 from leach liquors of manganese dust containing Mn3O4 and iron and zinc oxide as minor impurities

Wen, Jiangxian; Lee, Man Seung

doi:10.1016/j.hydromet.2023.106056

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…The solubility product values of ZnS and NiS at 25 °C are 3.2 × 10 −19 and 1.6 × 10 −24 , respectively, indicating that it is possible to separate Zn(II) from Ni(II) by precipitation of ZnS 20 . However, careful control of solution pH is necessary to avoid co‐precipitation of NiS 25 . Therefore, solvent extraction was employed in this study to separate Zn(II) from the filtrate.…”

Section: Resultsmentioning

confidence: 99%

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Recovery of pure nickel powder from petroleum refinery sludge via a process consisting of leaching, cementation, precipitation, solvent extraction, and chemical reduction

Wen

Lee

2023

J of Chemical Tech & Biotech

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BackgroundSludge resulted from the petroleum refining step contains some metal oxides such as nickel, copper, aluminum, iron, zinc, calcium, and magnesium. Since the demand for nickel is increasing, a process was proposed to recover pure nickel metal powder from this sludge. In this study, leaching, cementation, precipitation, solvent extraction, and chemical reduction operations were carried out and employed for the recovery of nickel powder from sludge.ResultsNickel oxide was first completely dissolved using 0.3 M H2SO4 solution at a pulp density of 50 g/L. The leaching solution contained Al(III), Ca(II), Cu(II), Fe(III), Mg(II), Ni(II), and Zn(II). Most of the copper, magnesium, nickel, and zinc were completely dissolved at this step. Copper(II) was removed by cementation with iron powder. After oxidizing Fe(II) to Fe(III) using H2O2, Fe(III) and Al(III) were simultaneously separated by precipitation of their hydroxides at a solution pH of 4. Five stages of cross current extraction of Zn(II) with saponified Cyanex 272 led to a raffinate containing only Ni(II), Ca(II), and Mg(II). Nickel metal powders were recovered from this raffinate by chemical reduction with hydrazine.ConclusionsThe mass balance of the continuous experiments verified that 99% of the nickel was recovered from the sludge as metal powders with extra high purity. In these separation steps, optimum conditions were obtained and a simple and efficient process was proposed to recover pure nickel metal powders from the sludge.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

“…20 However, careful control of solution pH is necessary to avoid co-precipitation of NiS. 25 Therefore, solvent extraction was employed in this study to separate Zn(II) from the filtrate.…”

Section: Separation Of Zn(ii) By Solvent Extraction With Canex 272mentioning

confidence: 99%

Recovery of pure nickel powder from petroleum refinery sludge via a process consisting of leaching, cementation, precipitation, solvent extraction, and chemical reduction

Wen

Lee

2023

J of Chemical Tech & Biotech

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“…A special case of these (iii) types of compounds It is of the utmost necessity to develop effective strategies for the detection and removal of iron(III) in water environments. These strategies included the use of different separation technologies from precipitation to adsorption, with recent publications considering liquid-liquid extraction using (acidic, solvation, and ionic liquid-based extractants) [5][6][7][8][9], ion-exchange resins (Lewatit TP-208) [2], adsorption (carbon derivatives, zeolites, and microgels) [10][11][12][13], and membrane [4,14] procedures.…”

Section: Introductionmentioning

confidence: 99%

Iron Control in Liquid Effluents: Pseudo-Emulsion Based Hollow Fiber Membrane with Strip Dispersion Technology with Pseudo-Protic Ionic Liquid (RNH3+HSO4−) as Mobile Carrier

Robla

2023

Membranes

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The transport of iron(III) from aqueous solutions through pseudo-emulsion-based hollow fiber with strip dispersion (PEHFSD) was investigated using a microporous hydrophobic hollow fiber membrane module. The pseudo-protic ionic liquid RNH3HSO4− dissolved in Solvesso 100 was used as the carrier phase. This pseudo-protic ionic liquid was generated by the reaction of the primary amine Primene JMT (RNH2) with sulphuric acid. The aqueous feed phase (3000 cm3) containing iron(III) was passed through the tube side of the fiber, and the pseudo-emulsion phase of the carrier phase (400 cm3) and sulphuric acid (400 cm3) were circulated through the shell side in counter-current operational mode, using a single hollow fiber module for non-dispersive extraction and stripping. In the operation, the stripping solution (sulphuric acid) was dispersed into the organic membrane phase in a tank with a mixing arrangement (a four-blade impeller stirrer) designed to provide strip dispersion. This dispersed phase was continuously circulated from the tank to the membrane module in order to provide a constant supply of the organic solution to the fiber pores. Different hydrodynamic and chemical parameters, such as feed (75–400 cm3/min) and pseudo-emulsion phases (50–100 cm3/min) flows, sulphuric acid concentration in the feed and stripping phases (0.01–0.5 M and 0.5–3 M, respectively), metal concentration (0.01–1 g/L) in the feed phase, and PPILL concentration (0.027–0.81 M) in the carrier phase, were investigated. From the experimental data, different diffusional parameters were estimated, concluding that the resistance due to the feed phase was not the rate-controlling step of the overall iron(III) transport process. It was possible to concentrate iron(III) in the strip phase using this smart PEHFSD technology.

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Rapid sustainable synthesis of Mn2O3, CuO, and binary CuO/Mn2O3 nanoparticles using continuous laser diode for enhanced antibacterial strategy against resistant pathogens

Anber,

Hameed,

Rheima

et al. 2024

Case Studies in Chemical and Environmental Engineering

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Options to recover high-purity MnO2 from leach liquors of manganese dust containing Mn3O4 and iron and zinc oxide as minor impurities

Cited by 4 publications

References 14 publications

Recovery of pure nickel powder from petroleum refinery sludge via a process consisting of leaching, cementation, precipitation, solvent extraction, and chemical reduction

Recovery of pure nickel powder from petroleum refinery sludge via a process consisting of leaching, cementation, precipitation, solvent extraction, and chemical reduction

Iron Control in Liquid Effluents: Pseudo-Emulsion Based Hollow Fiber Membrane with Strip Dispersion Technology with Pseudo-Protic Ionic Liquid (RNH3+HSO4−) as Mobile Carrier

Rapid sustainable synthesis of Mn2O3, CuO, and binary CuO/Mn2O3 nanoparticles using continuous laser diode for enhanced antibacterial strategy against resistant pathogens

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