Leaching of copper oxide with different acid solutions

Habbache, N.; Alane, N.; Djerad, Souad; Tifouti, L.

doi:10.1016/j.cej.2009.05.020

Cited by 221 publications

(104 citation statements)

References 16 publications

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“…Thus, leaching copper from WPCBs by these six IL acids could not be controlled by surface chemical reaction. In fact, such process by inorganic acids usually control by surface chemical reaction (Habbache et al, 2009).…”

Section: Effect Of Reaction Timementioning

confidence: 99%

Comparative study on copper leaching from waste printed circuit boards by typical ionic liquid acids

et al. 2015

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a b s t r a c tWaste printed circuit boards (WPCBs) are attracting increasing concerns because the recovery of its content of valuable metallic resources is hampered by the presence of hazardous substances. In this study, we used ionic liquids (IL) The results showed that all six IL acids could successfully leach copper out, with near 100% recovery. WPCB particle size and leaching time had similar influences on copper leaching performance, while IL acid concentration, hydrogen peroxide addition, solid to liquid ratio, temperature, showed different influences. Moreover, IL acid with HSO 4 À was more efficient than IL acid with CF 3 SO 3 À . These six IL acids indicate a similar behavior with common inorganic acids, except temperature since copper leaching rate of some IL acids decreases with its increase. The results of leaching kinetics studies showed that diffusion plays a more important role than surface reaction, whereas copper leaching by inorganic acids is usually controlled by surface reaction. This innovation provides a new option for recovering valuable materials such as copper from WPCBs.

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Section: Effect Of Reaction Timementioning

confidence: 99%

Comparative study on copper leaching from waste printed circuit boards by typical ionic liquid acids

et al. 2015

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“…In this reaction system, most reactions follow a shrinking core model (SCM), which can approximately express the dissolution performance of particles. According to this model, the rate of the controlling step of the dissolution process is divided into three independent models [2]. The following expressions can be used to describe the dissolution kinetics of the process:…”

Section: Kinetic Studymentioning

confidence: 99%

“…As an important nonferrous metal, copper is widely applied in the electrical and electronics industries, the rolling industry, communication, aviation industries, and the chemical industry because of its excellent physical and chemical properties [1,2]. In previous years, copper was primarily smelted from copper sulfide minerals after being separated from gangue minerals by beneficiation methods [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Given the increasingly strict environmental protection regulations with regard to sustainable development and certain disadvantages of inorganic acids present in the leaching process, organic acids such as citric, acetic and oxalic acids can be advantageous leaching agents. However, weak acidity is characteristic of organic acids, and their low boiling temperatures and instability restrict their industrial applications [2,[16][17][18]. Numerous studies on the extraction of copper from oxidized copper minerals using alkaline media, such as ammonia, ammonia/ammonium carbonate, ammonium chloride, ammonium sulfate, -159 -and ammonium nitrate, have been conducted [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Leaching of Copper from Malachite with Methane-sulfonic Acid

Feng

Wen

Zhao

et al. 2015

SERDJ

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The process of leaching copper from malachite using methane-sulfonic acid (MSA) as an organic leaching reagent was investigated in this study. The effects of acid concentration, reaction temperature, particle size, and stirring speed on the copper leaching fraction were determined. Results indicated that leaching reagent concentration and reaction temperature exerted significant effects on copper extraction, whereas particle size and stirring speed exerted a relatively minor effect on the leaching rate. The kinetics of the dissolution process followed the shrinking core model, and a new kinetic model was found suitable to represent the rate-controlling step. The apparent activation energy of this process was determined to be 24.48 kJ/mol, and a semi-empirical rate equation was obtained to describe the process.

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“…Glucose acid was used by Hurşit [6] as leaching reagent for zinc oxide ores, and citric acid was applied by Shabani [14] for oxide ores. The results from previous studies indicated that organic acids, such as citric acid, acetic acid and glucose acid, could be employed as beneficial leaching reagents [15]. Their aqueous solutions are all mildly acidic [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Dissolution Kinetics of Zinc Oxide Ore with an Organic Acid

Deng¹,

Sun²,

Lin³

et al. 2015

Int J Metall Mater Eng

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In this study, the dissolution kinetics of smithsonite as an alternative zinc source in trichloroacetic acid (TCA) solution was investigated. TCA can be derived from industrial waste acid in the pharmaceutical, biotechnology and chemical fields. Results showed that the dissolution kinetics conformed to the shrinking core model controlled by surface chemical reaction. The apparent activation energy of the reaction was calculated as 47.61 kJ/mol, indicating the obvious effect of temperature on the reaction rate. The reaction kinetic equation associated with the main influencing factors was eventually established as 1-(1-x) -1/3 = [0.0002 (C) 0.384 (P) 0.969 exp(-5726T)] t. The high reaction speed of smithsonite in TCA solution shows that TCA has a dissolution effect on zinc oxide ores; thus, it can be employed as an advantageous organic leaching reagent environmentally friendly. In addition, the experimental parameters obtained provide basic data and reference for the leaching of other carbonate minerals of copper, zinc, lead and cobalt, among others, in an organic acid system.

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Leaching of copper oxide with different acid solutions

Cited by 221 publications

References 16 publications

Comparative study on copper leaching from waste printed circuit boards by typical ionic liquid acids

Comparative study on copper leaching from waste printed circuit boards by typical ionic liquid acids

Leaching of Copper from Malachite with Methane-sulfonic Acid

Dissolution Kinetics of Zinc Oxide Ore with an Organic Acid

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