Selective dissolution of copper from copper-chromium spent catalyst by baking–leaching process

Parhi, Pankaj Kumar; Sethy, Tikina Rani; Rout, P.C.; Sarangi, K.

doi:10.1016/j.jiec.2014.03.026

Cited by 12 publications

(2 citation statements)

References 24 publications

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“…In recent years, studies have been conducted on valuable metals such as arsenopyrite, enargite (Cu 3 AsS 4 ), tennantite (Cu 12 As 4 S 13 ), molybdenite (MoS 2 ), low grade nickel ores, spent catalyst, and nickel-containing laterite using acid baking-water leaching. The acid baking-water leaching process refers to a method of leaching valuable metals such as Cu [13], Fe [14], Zn [15], As [13], Co, Ni, Mn, Al [12], Mg, and Cr by mixing sulfide minerals with a concentrated sulfuric acid solution followed by heating, i.e., baking them in an electric furnace at a relatively low temperature, the range of which is 300 • C to 500 • C, for about four hours or longer, and then dissolving the baking products with 70 • C water [14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Sulfuric Acid Baking—Water Leaching for Gold Enrichment and Arsenic Removal from Gold Concentrate

et al. 2021

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During the roasting of gold concentrate to improve gold recovery, arsenic is released into the air and valuable elements such as Fe, Cu, Zn, and Pb are converted into oxide minerals. In this research, we evaluated the release of As and the loss of valuable metals during the acid baking and hot water leaching processes used for gold concentrate. The acid bake tests were conducted for gold concentrate using an electric furnace by applying various concentrations of H2SO4 solution under different baking times. The water leaching process was enacted using 70 °C water for the baked samples. Chemical and mineral compositions of the raw and treated samples were analyzed using AAS and XRD, respectively. The results show that soluble metal sulfates, such as rhomboclase and mikasite, were formed in the baked samples, and that the leaching of valuable metals (Fe, Cu, Zn, and Pb) was accelerated during the hot water leaching procedure. During acid baking, arsenic was partially removed by volatilization, and the rest of the arsenic-containing minerals were converted to soluble minerals. The soluble arsenic-containing mineral resulted in a dissolution that was 60 times higher than in the roasted sample. The maximum gold grade of solid residues increased up to 33% through the acid baking–water leaching process. It was confirmed that acid baking with H2SO4 prevented As release into the air, as well as the recovery of valuable metals through hot water leaching, such as Fe, Cu, Zn, and Pb, which were formerly discarded in the tailings.

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Section: Introductionmentioning

confidence: 99%

Sulfuric Acid Baking—Water Leaching for Gold Enrichment and Arsenic Removal from Gold Concentrate

et al. 2021

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“…In another investigation, selective dissolution of Cu was observed using baking-leaching process (Parhi et al 2015). After leaching of Cu and Cr, solvent extraction can be used for extraction/separation.…”

Section: Introductionmentioning

confidence: 99%

A hydrometallurgical process for the recovery of metal values from spent Cu–Cr catalyst

Panigrahi¹,

Rout

Garnaik

et al. 2017

Mineral Processing and Extractive Metallurgy

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The Cu-Cr catalyst has been used in many chemical processes and dumped in the landfill after losing the catalytic property. Owing to the toxicity of chromium, the dumping of catalyst is not environmentally acceptable. So metal values should be removed before disposal. One typical Cu-Cr catalyst was leached with H 2 SO 4 and from the leach liquor Cu and Cr were extracted using LIX 860N and NaD2EHPA, respectively. The McCabe-Thiele diagram at pH 3.5 with 20% LIX 860N indicated two stages at A:O = 1:1 for quantitative extraction of copper. The stripping of Cu was achieved by 10% H 2 SO 4 . After the extraction of Cu, the extraction of Cr was carried out with NaD2EHPA. The McCabe-Thiele diagram for Cr extraction with 0.5 M NaD2EHPA at pH 3.0 showed two stages at A:O ratio of 1:1. The loaded organic of chromium was stripped with the mixture of Na 2 CO 3 , NaOH and H 2 O 2 .

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Selective Recovery of Lithium from Cathode Materials of Spent Lithium Ion Battery

Higuchi¹,

Ankei²,

Nishihama³

et al. 2016

JOM

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Selective dissolution of copper from copper-chromium spent catalyst by baking–leaching process

Cited by 12 publications

References 24 publications

Sulfuric Acid Baking—Water Leaching for Gold Enrichment and Arsenic Removal from Gold Concentrate

Sulfuric Acid Baking—Water Leaching for Gold Enrichment and Arsenic Removal from Gold Concentrate

A hydrometallurgical process for the recovery of metal values from spent Cu–Cr catalyst

Selective Recovery of Lithium from Cathode Materials of Spent Lithium Ion Battery

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