Solvent extraction of zinc from synthetic Zn-Cd-Mn chloride solution using D2EHPA: Optimization and thermodynamic studies

Jafari, Hossein; Abdollahi, Hadi; Gharabaghi, Mahdi; Balesini, A. A.

doi:10.1016/j.seppur.2018.01.020

Cited by 55 publications

(17 citation statements)

References 28 publications

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“…Solvent extraction process is a common way for selective separation or concentration of different metal ions. Purification and concentration of zinc using SX, by different organic solutions and extractants has been reported [26][27][28][29] . Extraction mechanisms of zinc using D2EHPA in an aliphatic diluent can be written as follow 30 :…”

Section: Openmentioning

confidence: 99%

Leaching and solvent extraction purification of zinc from Mehdiabad complex oxide ore

Soltani

Darabi

Aram

et al. 2021

Sci Rep

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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 calcophanite. Main gangue minerals were quartz, goethite, hematite, and calcite. Central composite design (CCD) method was used to design leaching experiments and the optimum conditions were found as follows: 30% of solid fraction, 22.05% sulphuric acid concentration, and the leaching temperature of 45 °C. The PLS containing 35.07 g/L zinc, 3.16 g/L iron, and 4.58 g/L manganese impurities was produced. A special purification process including Fe precipitation and Zn solvent extraction was implemented. The results showed that after precipitation of iron, Zn extraction of 88.5% was obtained with the 2 stages extraction system composed of 30 vol% D2EHPA as extractant. The overall Zn recovery from the ore was 71.44%. Therefore, an appropriate solution containing 16.6 g/L Zn, 0.05 g/L Fe, and 0.11 g/L Mn was prepared for the electro-winning unit without using the roasting and calcination steps (conventional method), which result in environmental pollution.

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Section: Openmentioning

confidence: 99%

Leaching and solvent extraction purification of zinc from Mehdiabad complex oxide ore

Soltani

Darabi

Aram

et al. 2021

Sci Rep

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“…The majority of these works used either the equilibrium slope or numerical analysis, or both, to determine the stoichiometry of metal-extractant complexes (Chang et al, 2011;Elizalde et al, 2019;Thakare and Malkhede, 2014;Wahab et al, 2016;Yin et al, 2015). Other methods like the Job plot (Wahab et al, 2016) and quantitative analysis with FTIR (Chang et al, 2011) (Aidi and Barkat, 2018) and Cu(II)-N-(2 hydroxybenzylidene) aniline (Aidi and Barkat, 2010) complexes, respectively, in cyclohexane; ∆H o of 25.65 kJ•mol -1 , ∆S o of 0.079 kJ•mol -1 •K -1 , and ∆G o of 0.86 kJ•mol -1 for Zn(II)-D2EHPA complexes in kerosene (Jafari et al, 2018); and ∆H o of 17.32 kJ•mol -1 , ∆S o of 0.041 kJ•mol -1 •K -1 , and ∆G o of 5.09 kJ•mol -1 for vanadium(V)-D2EHPA complexes in kerosene (Razavi et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Extraction of Cu(II) From Acidic Sulfate Media by Palm Kernel Fatty Acid Distillate: Stoichiometry and Thermodynamic Studies

Halim¹,

Morad²,

Chang³

2021

Preprint

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In efforts to develop a novel low-cost and eco-friendly organic solvent, namely, palm kernel fatty acid distillate (PKFAD), with free fatty acids (FFAs) as the active components, for Cu(II) extraction from acidic sulfate media, this work aimed to gain insight into the stoichiometry of Cu(II)-FFA complexes (extracted species) in PKFAD and their extraction thermodynamics. The former was explored by both the equilibrium slope and numerical analyses, while the latter was determined from the extraction of Cu(II) by PKFAD at different temperatures. Both the equilibrium slope and numerical analyses revealed that the stoichiometry of Cu(II)-FFA complexes in PKFAD was 1:6, whereas the thermodynamic study indicated that Cu(II) extraction by PKFAD was exothermic, nonspontaneous, and enthalpy-driven over the temperature range studied. A plausible structure of Cu(II)-FFA complexes in PKFAD was also postulated based on the thermodynamic data obtained.

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“…In recent decades, different acidic extractants such as D2EHPA 7 , PC-88A 8 , Cyanex272 9 , Cyanex302 10 , and Cyanex921 11 have been commonly suggested for Zn (II) extraction from sulfate medium. The selective extraction of zinc from manganese and cadmium in the hydrochloric acid media using D2EHPA has been investigated by Jafari and coworkers 12 . By considering the impact of contact time, equilibrium pH, extractant concentration, O/A ratio, and temperature on the solvent extraction process, they investigated the required theoretical stages for zinc extraction as well as the thermodynamic behavior of chemical reaction.…”

Section: Introductionmentioning

confidence: 99%

Reactive Zinc Extraction in MRDC Column; Case Study by Mathematical Modelling and Applying the Droplet Size Distribution with Forward Mixing Approach

Shakib

Torkaman

Torab‐Mostaedi

et al. 2021

Preprint

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In this survey, the reactive mass transfer data are determined for zinc extraction from chloride solution using D2EHPA in the MRDC extraction column. The numerical analysis for evaluating the column performance is applied to describe mass balance equations. Four mathematical models (backflow, forward mixing, plug flow, and axial dispersion) are investigated to compute the mass transfer coefficients of the dispersed phase. The solvent extraction experiments showed that the optimum zinc transport efficiency in rotor speed of 410 rpm in this column is equal to 98.85% and 99.85 for extraction and stripping stages, respectively. The model's achievement is compared with the solvent extraction data and a significant validity is obtained by coupling the forward mixing approach. The mathematical modeling expresses that the coefficients of axial dispersion and backflow based on the continuous phase increase by an increase in the rotor speed and inlet continuous phase rate. While these coefficients reduce at a higher inlet dispersed phase rate. The FMM method is preferred to predict the reactive mass transfer rate in the MRDC column due to the lowest relative deviation. The experimental study and mathematical modeling in this report provide beneficial information about the metallurgical industry to design solvent extraction equipment.

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Solvent extraction of zinc from synthetic Zn-Cd-Mn chloride solution using D2EHPA: Optimization and thermodynamic studies

Cited by 55 publications

References 28 publications

Leaching and solvent extraction purification of zinc from Mehdiabad complex oxide ore

Leaching and solvent extraction purification of zinc from Mehdiabad complex oxide ore

Extraction of Cu(II) From Acidic Sulfate Media by Palm Kernel Fatty Acid Distillate: Stoichiometry and Thermodynamic Studies

Reactive Zinc Extraction in MRDC Column; Case Study by Mathematical Modelling and Applying the Droplet Size Distribution with Forward Mixing Approach

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