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Publikováno v:
Hydrometallurgy. 188:201-215
Direct leaching of sphalerite has been considered as a cost effective and an environmentally benign alternative to the traditional two-step roasting-leaching approach. Yet the slow leaching rate due to the formation of surface passivating phases rema
Autor:
Chandrika Akilan, Michael J. Nicol
Publikováno v:
Hydrometallurgy. 178:7-11
The dissolution of liberated chrysocolla particles in dilute (0.033 to 0.15 mol L−1) sulfuric acid solutions has been shown to be relatively rapid and the kinetics of dissolution are consistent with rate-determining diffusion of acid through the si
Autor:
Michael J. Nicol
Publikováno v:
Hydrometallurgy. 177:214-217
The dissolution of screened samples of pure malachite in dilute (0.033 to 0.15 M) sulfuric acid solutions has been shown to be rapid and the kinetics of dissolution are consistent with rate-determining chemical reaction on the surface of the shrinkin
Publikováno v:
Hydrometallurgy. 204:105728
The demand for high purity alumina (HPA) has been steadily increasing due to its use in advanced electronics and battery applications. This paper presents an innovative synthesis pathway, which is one of a series of pathways investigated to obtain HP
Publikováno v:
Hydrometallurgy. 169:585-588
Studies on the extractive purification of zinc sulfate solutions from chloride using mixtures of trialkyl phosphine oxide (TRPO, CYANEX 923) and organophosphorus acids (HR) as extractants have been carried out. The acids used were di(2-ethylhexyl)pho
Publikováno v:
Hydrometallurgy. 169:282-289
In copper (Cu) smelters, precious metals in recycled materials are distributed into electrolytic Cu slime. During the precious metal refining process, rhodium (Rh) and ruthenium (Ru) are concentrated from the slime into residues containing selenium (
Autor:
Shilong Wei, Lili Zhu, Lei Guo, Junshen Liu, Liu Qingqing, Xiaoliang Chen, Shengxiao Zhang, Xunyong Liu
Publikováno v:
Hydrometallurgy. 166:205-213
A novel solvent-impregnated resin (SIR) with trialkylphosphate Cyanex 923 as extractants and macroporous resin HZ830 as substrate was prepared to adsorb In(III) from HCl solutions. The effects of HCl concentration on adsorption were investigated with
Publikováno v:
Hydrometallurgy. 199:105531
Chile is host to one of the most considerable Cu resources in the world. The primary source of Cu is from porphyry deposits. However, associated “exotic-Cu” deposits are also significant in the Atacama Desert of northern Chile. The critical proce
Publikováno v:
ResearcherID
An equimolar mixture of weakly basic and chelating reagent was used for extracting zinc(II) from acid chloride solutions at various concentrations of chloride and hydrogen ions. N,N-dihexylpyridine-3-carboxamide was used as a weak base and 1-phenylde
Publikováno v:
Hydrometallurgy. 160:147-151
The removal of chloride from simulated zinc sulfate electrolyte by ozone oxidation was investigated. The effects of various process factors including the O2 flow, bubbling time, reaction temperature, H2SO4 and ZnSO4 concentration, and existence of Mn