Experimental and Theoretical Investigation of Distribution Equilibria and Kinetics of Copper(II) Extraction with LIX 84 I and TFA

Younas, Mohammad; Druon‐Bocquet, Stéphanie; Romero, Julio; Sánchez, J.

doi:10.1080/01496395.2014.978943

Cited by 13 publications

(6 citation statements)

References 39 publications

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“…The oxime functional groups exhibited a notable affinity for metal ions, particularly Cu, contributing to the high extraction efficiency of 97% as described and compared in the literature. 19 , 20 The resulting aqueous phase, termed the raffinate, revealed a Cu concentration of 800 ppm as determined by inductively coupled plasma–optical emission spectroscopy (ICP–OES). A comparative analysis with Acorga M5640 and Mextral 5640H underscored LIX 63–70s efficacy demonstrating notably faster equilibrium conditions.…”

Section: Resultsmentioning

confidence: 99%

Removal of Nickel from Nickel Sulfite-Fire Assay Dissolution Filtrate Through Precipitation

Mabowa,

Mkhohlakali,

Mokoena

et al. 2024

ACS Omega

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This study responds to stringent environmental regulations and increasing focus on resource conservation by exploring economically viable refining technologies through recycling. With the rising costs of filtrate disposal, there is a significant emphasis on removing and recycling valuable constituents, particularly nickel and copper (Ni and Cu). Herein, we employ analytical techniques with the aim of investigating an alternative method for recovering Ni and other valuable metals from a nickel sulfide-fire assay filtrate using Scurve precipitation under optimal conditions. The waste from the fire assay procedure contains substantial amounts of Ni and other critical metals, with concentrations of 62.7 g/L of Ni and 3.87 g/L of Cu. Prior to precipitation, traditional solvent extraction was used for Cu extraction, selectively removed before separating primary impurities such as iron (Fe). A pivotal aspect of this research involves applying S-curve precipitation with precise parameters at different pH levels. Analytical techniques reveal a minor depletion occurs as Ni is separated from Fe at a pH of 2.5, resulting in the formation of a refined Ni stream that is then refined into a mixed hydroxide Ni(OH) 2 product. The efficiency of 5,8-diethyl-7-hydroxydodecan-6-oxime (LIX 63−70) in extracting valueadded metals from fire assay waste is exceptionally high, integrating recycling and repurposing of value-added base metals to promote a circular economy.

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Section: Resultsmentioning

confidence: 99%

Removal of Nickel from Nickel Sulfite-Fire Assay Dissolution Filtrate Through Precipitation

Mabowa,

Mkhohlakali,

Mokoena

et al. 2024

ACS Omega

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“…The concentration of TFA was taken as 160 mol.m -3 . This achieves the partition coefficient value of 1 [16,17]. As the membrane material was hydrophobic, the organic phase penetrated through the pores of the membrane and immobilized up to the pores mouth at the aqueous phase-membrane interface.…”

Section: Membrane Process Configuration and Its Propertiesmentioning

confidence: 93%

“…Copper (II) is considered as complexed with TFA at the interface, and this process was considered fast enough to achieve equilibrium at the interface on aqueous phase boundary layer [16,17]. TFA-Cu 2+ complex formation at interface could be taken as a hypothetical simple extraction.…”

Section: Model Approach and Its Considerationsmentioning

confidence: 99%

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Numerical modelling and simulation of membrane-based extraction of copper (II) using hollow fiber contactors

Muhammad¹,

Younas²,

Druon‐Bocquet³

et al. 2017

Desalination and Water Treatment

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This work describes the mathematical modelling and numerical simulation of a hollow fiber membrane contactor for copper (II) extraction from aqueous solutions with 1,1,1-trifluoro-2,4-pentanedione commonly known as TFA diluted in n-decanol. Model was developed for convection-diffusion mass and momentum transfer using continuity and Navier-Stokes equations. Model equations were solved using a computational fluid dynamics code, and results were validated with experimental data. After validation of model, simulation was performed to check the effects of hydrodynamics conditions on contactor performance. 49% of copper (II) was extracted from aqueous solution for feed flow rate of 8.3 × 10 -7 m 3 .s -1 , and for partition coefficient equals to 1. However, simulation results indicated that extraction could be greatly improved by decreasing feed flow and increasing partition coefficient. Simulation was also run to study the distribution profiles of copper (II) concentration, flux and velocity in 2-D.

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“…To provide the overall mass transfer performance of pulsed columns for two liquidliquid systems, sulphuric acid (aq) -3 v/v % Alamine 336, 1 v/v % isodecanol in ShellSol 2046 (org) and copper sulphate (aq) -6.4 v/v % LIX 84 in ShellSol 2046 (org) systems are used. The sulfuric -Alamine system is representative for a fast kinetics system (first order kinetic reaction rate around 1.4 s -1 [5]) and the copper sulfate -LIX 84 system is representative for a slow kinetics system with (first order kinetic reaction rate around 2.1 x 10 -2 s -1 [6]).…”

Section: Introductionmentioning

confidence: 99%

Comparison of mass transfer performance of pulsed columns with Tenova kinetics internals and standard disc and doughnut internals

Wang

et al. 2019

Hydrometallurgy

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One of the limitations to the application of columns to solvent extraction in the minerals industry is their relative inefficiency in slow kinetic systems such as those used for the separation of copper.In order to overcome this, this work examines the performance of a new kinetic internal and compares it to standard column internals for both a fast and slow kinetic system.The mass transfer performance of a pilot scale pulsed solvent extraction column with Tenova Kinetics Internals (TKI) and standard disc and doughnut internals (DDI) are compared, including the effect of pulsation intensity, continuous and dispersed phase velocities using the H2SO4 -Alamine® 336 system, a fast kinetic system, and CuSO4 -LIX® 84 system, a slow kinetic system.The height of mass transfer unit (Hoc) for the CuSO4 -LIX 84 system increased with continuous and dispersed phase velocity and decreased with the increase of pulsation intensity. The Hoc for TKI was lower than the DDI for the same operating conditions and the TKI reduced the impact of both phase velocities on mass transfer. TKI can maintain the mass transfer performance for fast kinetics H2SO4-Alamine 336 system compared to standard disc and doughnut internals and improve mass transfer performance for slow kinetics CuSO4-LIX® 84 system. An empirical correlation to predict the height of mass transfer unit in both internals was developed with absolute relative errors of 28.0% and 19.2% for the H2SO4 -Alamine 336 system and CuSO4 -LIX 84 system, respectively.

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Experimental and Theoretical Investigation of Distribution Equilibria and Kinetics of Copper(II) Extraction with LIX 84 I and TFA

Cited by 13 publications

References 39 publications

Removal of Nickel from Nickel Sulfite-Fire Assay Dissolution Filtrate Through Precipitation

Removal of Nickel from Nickel Sulfite-Fire Assay Dissolution Filtrate Through Precipitation

Numerical modelling and simulation of membrane-based extraction of copper (II) using hollow fiber contactors

Comparison of mass transfer performance of pulsed columns with Tenova kinetics internals and standard disc and doughnut internals

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