Optimization of synergistic extraction of neodymium ions from monazite leach solution treatment via HFSLM using response surface methodology

Wannachod, Thanaporn; Phuphaibul, Phupairum; Mohdee, Vanee; Pancharoen, Ura; Phatanasri, Suphot

doi:10.1016/j.mineng.2015.01.016

Cited by 15 publications

(4 citation statements)

References 36 publications

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“…24 The stability of HFRLM and the parameters affecting the selectivity and transport rates through the membrane have been explored 25−29 in different applications, e.g., thorium recovery from aqueous waste, 24,30 extraction of copper(II) and cobalt(II) from waste water, 31 and separation of Nd(III) from mixed REE. 32,33 In the EPT configuration, the aqueous strip solution is dispersed in the organic solution. The aqueous strip droplets are prevented from penetrating into the fiber pores due to hydrophobicity of the membrane support.…”

Section: Introductionmentioning

confidence: 99%

“…This improves the long-term membrane stability, accelerates the mass transfer, and leads to improved operation . The stability of HFRLM and the parameters affecting the selectivity and transport rates through the membrane have been explored − in different applications, e.g., thorium recovery from aqueous waste, , extraction of copper(II) and cobalt(II) from waste water, and separation of Nd(III) from mixed REE. , …”

Section: Introductionmentioning

confidence: 99%

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Separation of Rare-Earth Elements Using Supported Liquid Membrane Extraction in Pilot Scale

Alemrajabi

Ricknell

Samak

et al. 2022

Ind. Eng. Chem. Res.

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The use of supported liquid membrane extraction for recovery and separation of rare-earth elements (REEs) has been investigated. Experiments have been carried out using the different configurations: (1) standard hollow fiber supported liquid membrane operation (HFSLM), (2) renewal liquid membrane operation (HFRLM), and (3) emulsion pertraction technology (EPT). The experiments were performed in pilot scale using a hollow fiber module with a mass transfer surface area of 8 m2. Synthetic feed solution was used with compositions based on a process for recovery of REE from an apatite concentrate. The total concentration of REE in the feed was varied from 1 to 22 mM REE and the pH was varied in the range 1.5–3.2. Di(2-ethylhexyl) phosphoric acid (D2HEPA) diluted in kerosene, 10% (v/v), was used as the organic membrane solution, and 3 M HCl was used as stripping solution. In supported liquid membrane extraction, the extraction performance is governed by both the kinetics of REE transport through the membrane and by thermodynamics. The effect of feed composition on the selectivity and transport of REE through the liquid membrane have been investigated. The results show that the liquid membrane is more selective toward the heavy REE at lower pH values and higher REE concentration. HFRLM shows a higher transport rate than HFSLM, while the HFSLM configuration gives a higher selectivity toward individual REE. The membrane performance in HFSLM configuration rapidly decays with time, while in the HFRLM and EPT configurations, the performance is much more stable. Possible mechanisms for decaying membrane performance are discussed, and gel formation is identified as being of significant importance. Gel formation is observed at an organic loading above ∼46% for Nd, 38% for Y, 46% for Dy, and 65% for Er. The work performed in this study serves as an initial step to demonstrate that HFRLM and EPT can provide stable operation and be feasible options for processing of REE liquors. A process flow diagram for the recovery of the REE, present in the apatite concentrate, in three fractions is proposed based on the results from this study.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Separation of Rare-Earth Elements Using Supported Liquid Membrane Extraction in Pilot Scale

Alemrajabi

Ricknell

Samak

et al. 2022

Ind. Eng. Chem. Res.

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“…However, the solvent extraction process has several drawbacks, including high chemical consumption, formation of a third phase, and the need for many extraction steps to obtain high purity products (Tasaki et al, 2007;Uezu et al, 1995). In addition, conventional solvent extraction methods are considered less effective at low metal ion concentrations (Suren et al, 2012;Wannachod et al, 2015). Therefore, the solvent extraction method was developed into a liquid membrane-based technology using emulsion liquid membrane (ELM) (Kakoi et al, 1998;Kumbasar & Tutkun, 2006).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Surfactants on Separation of Light Rare Earth Metals using Emulsion Liquid Membrane Method: Review

et al. 2022

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Rare earth metals (REM) are scarce elements and are only found in the form of complex compounds of phosphate and carbonate. REM consists of 17 elements classified into light REM, medium REM, and heavy REM. This article is focused on lightweight REM, which is widely applied in various industrial fields. Many REM applications are increasing the demand for high-purity and bulk REMs. However, REM has almost the same physical and chemical properties, making it difficult to separate. Therefore, the separation of REM is interesting to study with various methods, one of which is Emulsion Liquid Membrane (ELM). ELM is developing a solvent extraction method involving three phases: the external phase, the internal phase, and the membrane phase. The key to the success of ELM lies in the stability of the emulsion, which is very dependent on the type and concentration of surfactants, so in the ELM process, it is necessary to choose the right concentration and type of surfactant. Therefore, this article was made to know the effect of surfactants such as span-80, span-85, and T154 in separating light REM using the ELM method.

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“…Unlike one-factor-at-time (OFAT) experiments, statistical optimisation approaches can take into account the interactions of many variables in the generation of process responses (Goupy 1996). Design of experiments' (DOE) methods and response surface methodology (RSM) have been used in various fields, such as chemistry and chemical engineering (Tumay Ozer and Gucer 2011;Zolgharnein et al 2014) and minerals processing (Mohapatra et al 2009;Mpinga et al 2010;Yi et al 2010;Torralvo and Fernandez-Pereira 2011;Tripathy and Murthy 2012;Makokha et al 2012;Yaghobi Moghaddam et al 2012;McGrath et al 2013;Boylu 2013;Kokkılıc et al 2015;Wannachod et al 2015;Mbuya et al 2017) to optimise the process responses. In this work, the Plackett-Burman screening (Plackett and Burman 1946) and the Box-Behnken surface response plans (Box and Behnken 1960) will be sequentially considered for optimisation of limestone calcination.…”

Section: Introductionmentioning

confidence: 99%

Application of the response surface methodology to determine optimal conditions of castine calcination in a full-scale rotary kiln

Mbuya¹,

Kime

Kawama³

et al. 2019

Mineral Processing and Extractive Metallurgy

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The optimisation of the calcination process in industrial lime kilns is of particular importance because it affects the final quality of the lime, coal consumption, and pollutant emissions. This work investigated the effects of different operating variables of a full-scale rotary kiln on the minimisation of unburned castine and reactivity of produced lime. The L 8 (2 7 ) Plackett-Burman's experimental plan was used for screening the significant variables on the calcination yield and the quality of the lime. Sequentially, Box-Behnken design approach, L 15 (3 3 ), under Response Surface Methodology (RSM) was used to determine the best combination of the variables optimising the calcination of castine. Quadratic models were developed to characterise the influence of selected significant variables, temperature of the smoke chamber (x 1 = 400, 500, and 550°C), kiln rotational speed (x 2 = 120, 90, and 70 s/revolution) and coal flow rate (x 4 = 0.5, 0.7, and 1.0 t/h), on the responses obtained. Under optimised conditions, the lime produced yielded 0.93% of unburned castine and a reactivity of 93.96°C, corresponding to the configuration: x 1 = 120, x 2 = 0.5, and x 3 = 550°C. Analysis of variance was conducted to assess the strength of evidence of the developed models. Good correlation coefficients were obtained for unburned castine (R 2 = 0.92, p < 0.031) and reactivity (R 2 = 0.96, p < 0.006), indicating that the models developed could be used to estimate castine calcination response.

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Optimization of synergistic extraction of neodymium ions from monazite leach solution treatment via HFSLM using response surface methodology

Cited by 15 publications

References 36 publications

Separation of Rare-Earth Elements Using Supported Liquid Membrane Extraction in Pilot Scale

Separation of Rare-Earth Elements Using Supported Liquid Membrane Extraction in Pilot Scale

The Effect of Surfactants on Separation of Light Rare Earth Metals using Emulsion Liquid Membrane Method: Review

Application of the response surface methodology to determine optimal conditions of castine calcination in a full-scale rotary kiln

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