Extracting Copper by Lactic Acid from Copper Oxide Ore and Dissolution Kinetics

Deng, Jiushuai; Wen, Shuming; Deng, Jianying; Wu, Dandan; Yang, Jing

doi:10.1252/jcej.14we032

Cited by 20 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This behavior demonstrates that leaching is also influenced by a specific range of stirring speeds. In kinetic terms, a higher stirring speed accelerates diffusion and enables homogeneous mixing of the liquid and solid phases in the reactor, which can promote the reaction [13]. Thus, a stirring speed of 500 rpm was used thereafter to assure that the leaching reaction was not under external diffusion control.…”

Section: Effect Of Stirring Speedmentioning

confidence: 99%

“…For this reason, a great deal of attention has been focused on the study of the behavior and kinetics of leaching. Researches on leaching behavior and kinetics of copper oxide ores have been extensively conducted by different lixiviants including mineral acids such as HCl, H 2 SO 4 and HNO 3 [7,[9][10][11]; organic acids such as citric acid and lactic acid [11][12][13]; chlorine [14], ammonium hydroxide or ammonium salts including ammonium chloride, ammonium sulfate, ammonium nitrate, ammonium citrate and ammonium acetate, etc. (2,(15)(16)(17)(18)(19)(20)(21)(22)(23)(24) and alkaline glycine solutions [25].…”

mentioning

confidence: 99%

See 1 more Smart Citation

A comprehensive study of the leaching behavior and dissolution kinetics of copper oxide ore in sulfuric acid lixiviant

2018

View full text Add to dashboard Cite

The leaching behavior of an Iranian copper oxide ore in sulphuric acid was investigated in detail to evaluate the influence of various factors, to optimize the dissolution conditions and to determine the kinetics of the leaching. The results indicated that the increase in the leaching time and temperature enhanced the leaching rate of copper. The leaching rate increased up to a certain value with increasing the agitation rate, acid concentration and liquid/solid ratio and with further increment reduced. Agitaion rate had the most influence on the dissolution of copper. The 3D response surface graphs confirmed the interactive effects of sulphuric acid concentration, agitation speed, and liquid/solid ratio with temperature. About 91% copper content was leached at~13% sulphuric acid concentration, stirring rate of 600 rpm, liquid/solid ratio of 10 mL/g and 50 °C after 80 min leaching. The dissolution kinetics was examined according to heterogeneous models. The shrinking core model assuming rate control by diffusion through the product layer was found appropriate to describe the dissolution of copper in sulphuric acid solution. The activation energy was obtained to be 26.699 kJ/mol and equation representing the leaching kinetics of copper based on diffusioncontrolled model was found to be 1-3(1-x) 2/3 +2(1-x) = 161.97×exp(-26.699×10 3 /8.314×T)×t.

show abstract

Section: Effect Of Stirring Speedmentioning

confidence: 99%

mentioning

confidence: 99%

A comprehensive study of the leaching behavior and dissolution kinetics of copper oxide ore in sulfuric acid lixiviant

2018

View full text Add to dashboard Cite

show abstract

“…In the case of lactic acid, as the temperature rises, the change in the Gibbs energy increases, and the reverse reaction becomes more preferable. Deng [13] used this circumstance in their work, where lactic acid was used to dissolve copper from malachite ore at temperatures up to 70 °C.…”

Section: Introductionmentioning

confidence: 99%

Kinetic aspects of malachite deposition on marble from copper lactate solutions

Gogol¹,

Rozhkovoy²,

Sadyrbekov³

et al. 2023

Comptes Rendus. Chimie

View full text Add to dashboard Cite

Experiments were conducted to study the formation of copper minerals on carbonate material (marble) from lactate solutions. Main kinetic parameters were estimated from the curves of copper ions deposition. The reaction rate constant is 4.19 × 10 −6 s −1 and the effective diffusion coefficient is 1.39 × 10 −12 m 2 /s at room temperature (25 °C). IR spectra of sediments show good agreement with natural samples of malachite and azurite (Spassk deposit, Central Kazakhstan). The results show the possibility of using organic complexing agents for intensifying the processes of secondary mineral formation of copper carbonate minerals (malachite and azurite) to prevent the dissipation of heavy metal ions in soluble forms from poor deposits and dumps during their remediation.

show abstract