Abstract: The solvent extraction of copper and zinc from the bioleaehing solutions of low-grade sulfide ores with LIX984 and D2EHPA was investigated. The influences of …

 — In case of the ammonium chloride solutions the extractant of 1-(3-pyridyl)nonan-1-one was used for extraction of copper(II) at pH below 6 whereas in case of acidic chloride solution the 1-(2 ...

 — The concept of selectively extracting copper from a low-grade dump leach solution followed by stripping the copper into an acid solution from which electrowon copper cathodes could be produced ...

 — Solvent extraction (SX) of zinc (Zn) can be used to recover high-purity Zn from sulphide mineral leaching solutions, low-grade ores, and secondary resources. The …

 — Solvent extraction studies of copper and zinc have been carried out using Versatic 10 acid and Cyanex 272 separately from a model brass pickle liquor. Various parameters for the extraction and separation of copper and zinc such as effect of pH, extractant concentration, phase ratio etc. have been optimized. It was observed that …

 — The effects of pH and ammonium carbonate concentration on copper extraction have been studied using an aqueous solution containing 6.35 kg/m3 of copper and an organic solution containing 10 volume ...

ABSTRACT. An initial test work was carried out to demonstrate that solution produced by autoclave acid leaching of Electric Arc Furnace Dust (EAFD) from the steel production …

 — The present investigation is focused on zinc leaching from a zinc ore followed by iron precipitation and Zn solvent extraction and stripping. The optimum …

The Skorpion process comprises three processing steps, atmospheric leaching in sulphuric acid, zinc solvent extraction and electrowinning to produce special high grade zinc. The …

 — Solubility plots developed on theoretical considerations for copper-oxalic acid and zinc-oxalic acid system predicted the yield of precipitates in close agreement with experimental values. 97.3% ...

 — Zn recovery attempts from a copper-free extreme Acid Mine Drainage with ~ 53 g/L Fe and ~ 2 g/L Zn revealed Fe co-extraction in solvent extraction with 0.9 M D2EHPA or a mixture of 0.72 M D2EHPA ...

 — The organic reagent LIX 84 procured from the M/s Cognis Corporation, Ireland (Earlier M/s Henkel Inc., Tucson), mixed with appropriate quantities of kerosene oil as diluent has been used for the solvent extraction (SX) and separation of copper from the mixed solution containing copper, zinc, cadmium and nickel. LIX 84 is water insoluble

DOI: 10.1016/J.HYDROMET.2015.05.003 Corpus ID: 92682904; Direct solvent extraction of indium from a zinc residue reductive leach solution by D2EHPA @article{Xingbin2015DirectSE, title={Direct solvent extraction of indium from a zinc residue reductive leach solution by D2EHPA}, author={Li Xingbin and Deng Zhigan and Cun …

 — In the absence of additive (Fig. 2), the onset of Zn 2+ reduction (vs.Ag/AgCl) in Ethaline is at E = −1.18 V and the oxidation of Zn occurs via a two-stage process, with two oxidation peaks at E = −0.95 V and at −0.85 V. From careful examination of the voltammograms (Fig. s. 1 and 2) it is evident that the reduction process also occurs in …

 — The sample was obtained by the oxidative leaching of copper smelter slag with sulphuric acid. Batch and continuous solvent extraction tests were carried out in glass vessel and in a mixer-settler unit from MEAB Company, Sweden (MSU-0.5) respectively. ... From a common pregnant sulphate solution, copper, cobalt and zinc have been …

 — An integrated hydrometallurgical process was used for the zinc leaching and purification from a zinc ore containing 9.75 wt% zinc. The zinc minerals in the ore were hemimorphite, willemite, and ...

 — Many researchers have studied the use of D2EHPA for extraction of zinc from various aqueous solutions such as the ammonium oxalate, oxalic acid [28], sulfate [25,27, 29], and phosphoric acid ...

 — The high affinity for zinc by the phosphoric acid D2EHPA is the basis for its application in a recently ... Mixing a solution of a neutral extractant with an acidic aqueous solution can lead to protonation of the ... A. Soto, M. Soderstrom and E. Kamenetzky, 19th International Solvent Extraction Conference, Santiago, Chile, 2011. H ...

 — Iron (III) is the main impurity in the leaching solution, and it can be extracted with copper within the equilibrium pH range of 1.72–1.96. The separation factor of Cu/Fe (β = D Cu /D Fe) is an important factor to evaluate the extractant [12].The β Cu/Fe of LK-C2 was below 45.00 within the equilibrium pH range of 0.20–0.97. It increased with the …

of copper, nickel and zinc from synthetic solution using LIX 984 N as the extractant dissolved in kerosene, with an aim to separate these metals efficiently by single stage extraction.

 — The present communication investigates the reaction mechanism of extraction of Zn(II) and Ni(II) and thermodynamic modeling using di-(2-ethylhexyl) phosphoric acid (D2EHPA) as an organic extractant that is diluted in kerosene at T = 25 °C and the organic: aqueous phase ratio of 1:1 and pH range 2–6. The effect of two …

 — From a common pregnant sulphate solution, copper, cobalt and zinc have been effectively recovered in the individual metal solutions by means of solvent …

This tutorial review describes the coordination chemistry of commercial solvent extraction processes that are used to achieve the separation and concentration of the metals of value in extractive hydrometallurgy. Hydrometallurgy, which is underpinned by coordination chemistry, is often favoured …

 — Spent zinc electrolyte was used as the leachate and zinc concentrate was used as the reductant. The feed solution was generated by reductive leaching of the zinc residue in 190 g/L H 2 SO 4 at 90 °C, using a liquid–solid ratio of 7 mL/g, a mass ratio of zinc residue to zinc concentrate of 1:0.35, and a reaction time of 3 h. The chemical ...

 — Abstract This research investigates the extraction behavior of copper and zinc from the sulfate leachate of a porcelain stone tailings sample with Chemorex CP-150 and D2EHPA in detail. The findings demonstrated that Chemorex had greater ability and selectivity in the extraction of copper, while D2EHPA was better in the extraction of zinc. …

 — The choice of acid to use in the leaching depends on the leaching yield, but also on the compatibility of the leaching acid and the extractant used in the subsequent solvent extraction step (Karlfeldt Fedje et al., 2012) Efficient removal of Cu and Zn from MSWI fly ash by hydrochloric acid leaching at pH 2 has been obtained in our work ...

 — Over the last decade, AMD waters have gained more attention as a potential source of metals due to the emerging need to recover or recycle metals from secondary resources. Metals recovery supports sustainability and the development of a circular economy with benefits for resource conservation and the environment. In this study, five …

to separate and recover copper and zinc. Solvent extraction of copper and zinc using Versatic 10 acid Effect of pH During extraction of metals using acidic extractants, H+ ions are released causing the decrease in pH which subsequently lowers extraction of metals in several instances. So the extraction process is greatly affected by pH.

 — According to Rodriguez de San Miguel et al. (1997), the selectivity of LIX 984 for copper extraction lies in the pH range 0.5–2.5.Copper extraction from the pregnant liquor was carried out in three stages with 12% v/v LIX 984 diluted with kerosene at the conditions of 25 °C, pH 2.5 and varying aqueous/organic (A/O) phase ratios.

 — Mahdi et al. [25] in their work on separation of nickel and zinc ions in a synthetic acidic solution by solvent extraction using D2EHPA and Cyanex 272 stated that extraction of zinc was found to ...