scholarly journals Role of Glycerol Oxidation Pathways in the Reductive Acid Leaching Kinetics of Manganese Nodules Using Glycerol

ACS Omega ◽  
2021 ◽  
Author(s):  
Aishvarya Venkataseetharaman ◽  
Geetanjali Mishra ◽  
Malay Kumar Ghosh ◽  
Goutam Kumar Das
Keyword(s):  
Acid Leaching ◽  
Glycerol Oxidation ◽  
Leaching Kinetics ◽  
Manganese Nodules ◽  
Kinetics Of

Leaching kinetics of copper and valuable metal extraction from copper-cadmium residues of zinc hydrometallurgy by oxidation acid leaching

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jihao Guo ◽  
Hongao Xu ◽  
Bo Li ◽  
Yonggang Wei ◽  
Hua Wang
Keyword(s):  
Hydrogen Peroxide ◽  
Acid Concentration ◽  
Acid Leaching ◽  
Metal Extraction ◽  
Agitation Rate ◽  
Leaching Kinetics ◽  
Solid Ratio ◽  
Zinc Hydrometallurgy ◽  
Kinetics Of ◽  
Leaching Efficiency

Abstract Multiple purification of zinc sulfate solution is an important process for zinc hydrometallurgy, and large quantities of copper-cadmium residues are generated as byproducts in this process. Copper-cadmium residues contain a large number of valuable metals that must be recovered. A comprehensive extraction process has been proposed using sulfuric acid as the leaching reagent and hydrogen peroxide as the oxidizing reagent. The effects of acid concentration, leaching temperature, leaching time, liquid-to-solid ratio, hydrogen peroxide dosage and stirring speed on the leaching efficiency were investigated. The optimum conditions were determined as an acid concentration of 150 g/L, liquid-to-solid ratio of 4:1, hydrogen peroxide amount of 20 mL, time of 60 min, temperature of 30 °C, particle size of −d75 μm, and agitation rate of 300 r/min. It was concluded that the leaching efficiency of copper and cadmium reached 97%, but because of the existence of zinc sulfide in the residues, a lower leaching efficiency of zinc was obtained. Furthermore, the leaching kinetics of copper was also studied based on the shrinking core model. The activation energy for copper leaching was 5.06 kJ/mol, and the leaching process was controlled by the diffusion through the product layer.

Sulfuric acid leaching kinetics of South African chromite

2015 ◽  
Vol 22 (3) ◽  
pp. 233-240 ◽  
Author(s):  
Qing Zhao ◽  
Cheng-jun Liu ◽  
Pei-yang Shi ◽  
Bo Zhang ◽  
Mao-fa Jiang ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
South African ◽  
Acid Leaching ◽  
Leaching Kinetics ◽  
Sulfuric Acid Leaching ◽  
Kinetics Of

Acid leaching kinetics of zinc plant purification residue

2013 ◽  
Vol 23 (9) ◽  
pp. 2786-2791 ◽  
Author(s):  
Qian LI ◽  
Bao ZHANG ◽  
Xiao-bo MIN ◽  
Wen-qian SHEN
Keyword(s):  
Acid Leaching ◽  
Leaching Kinetics ◽  
Zinc Plant ◽  
Kinetics Of

Comparison of atmospheric citric acid leaching kinetics of nickel from different Indonesian saprolitic ores

2016 ◽  
Vol 161 ◽  
pp. 138-151 ◽  
Author(s):  
Widi Astuti ◽  
Tsuyoshi Hirajima ◽  
Keiko Sasaki ◽  
Naoko Okibe
Keyword(s):  
Citric Acid ◽  
Acid Leaching ◽  
Leaching Kinetics ◽  
Kinetics Of
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