Investigation of a novel ionic liquid, Cyphos IL 104 for the solvent extraction of mineral acids

Kumari, Aarti; Sinha, Manish Kumar; Sahu, Sushanta Kumar

doi:10.1016/j.hydromet.2015.09.016

Cited by 28 publications

(11 citation statements)

References 23 publications

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“…The priority of Cyphos IL 104 to combine with hydrogen ions over the rare earth metals ions might be the reason. The reaction mechanisms have been proposed [ 33 , 40 ] and shown in Equations (5) and (6), where RE represents the rare earth elements. Therefore, the reaction between Cyphos IL 104 and RE metals ions was weaker in a lower pH value environment.…”

Section: Resultsmentioning

confidence: 99%

Recovery and Separation of Dysprosium from Waste Neodymium Magnets through Cyphos IL 104 Extraction

2022

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In the present study, the extraction of rare earth elements (REEs) from waste neodymium magnets using phosphorus ionic liquid Cyphos IL 104 was investigated. The objective was to recover and separate the heavy REE (Dy) from light REEs (Nd and Pr). Therefore, the experimental parameters of ionic liquid extraction, including contacting time, the initial pH value, extractant concentration, and O/A ratio, have been optimized. The highest separation factor αDy/Nd of 45.18 and αDy/Pr of 47.93 has been achieved. Following the ionic liquid extraction, the comparison of different stripping agents and the stripping parameters (the concentration of stripping agent and A/O ratio) were also explored. In short terms, this research demonstrates the optimal parameters of Cyphos IL 104 for selectively extracting high REE (Dy) and reveals its potential for recovering and separating REEs in real waste.

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Section: Resultsmentioning

confidence: 99%

Recovery and Separation of Dysprosium from Waste Neodymium Magnets through Cyphos IL 104 Extraction

2022

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“…As industry developed, acidic wastewater pollution emerging from the industrial production in the metallurgical, steel pickling and surface cleaning processes has become a serious problem [1][2][3][4][5]. The conventional methods represented by neutralization, crystallization, thermal decomposition and solvent extraction are facing various problems including high energy consumption and further pollution by disposal of salts.…”

Section: Introductionmentioning

confidence: 99%

Porous Anion Exchange Membrane for Effective Acid Recovery by Diffusion Dialysis

et al. 2021

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Diffusion dialysis (DD) employing anion exchange membranes (AEMs) presents an attractive opportunity for acid recovery from acidic wastewater. However, challenges exist to make highly acid permeable AEMs due to their low acid dialysis coefficient (Uacid). Here, a series of porous and highly acid permeable AEMs fabricated based on chloromethyl polyethersulfone (CMPES) porous membrane substrate with crosslinking and quaternization treatments is reported. Such porous AEMs show high Uacid because of the large free volume as well as the significantly reduced ion transport resistance relative to the dense AEMs. Compared with the commercial dense DF-120 AEM, our optimal porous AEM show simultaneous 466.7% higher Uacid and 75.7% higher acid/salt separation factor (Sacid/salt) when applied to acid recovery at the same condition. Further, considering the simple and efficient fabrication process as well as the low cost, our membranes show great prospects for practical acid recovery from industrial acidic wastewater.

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“…Diffusion dialysis (DD) employing anion exchange membrane (AEM) as core component is recognized as the most economically promising technology for acid recovery from the industrial waste water, such as metal etching, titanium white production, stripping processes and so on [1] [2] [3] [4] [5]. It is well known that AEM has a positively charged matrix, such chemical structure may allow anions in the acidic waste solution (e.g.…”

Section: Introductionmentioning

confidence: 99%

One-Step Fabrication of Methylthiazole-Functionalized Anion Exchange Membranes for Diffusion Dialysis

Hu¹,

Song²

2018

OJPC

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Anion exchange membranes using brominated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO) as starting material were prepared from one-step functionalization by 4-methylthiazole (MTz). The obtain membranes with high thermal stability and mechanical strength showed satisfied diffusion dialysis performance for acid recovery. Specifically, when the optimal membrane was evaluated to recover acid from the simulated iron polishing waste solution (1.0 mol•L −1 FeCl 2 + 0.2 mol•L −1 HCl), its acid diffusion coefficient (U H+) was 0.019 m h −1 and separation factor was 40.1 at 25˚C, both of these two parameters are much higher than the corresponding values of the commercial DF-120 membrane, suggesting the great potential in the practical application for acid recovery.

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Investigation of a novel ionic liquid, Cyphos IL 104 for the solvent extraction of mineral acids

Cited by 28 publications

References 23 publications

Recovery and Separation of Dysprosium from Waste Neodymium Magnets through Cyphos IL 104 Extraction

Recovery and Separation of Dysprosium from Waste Neodymium Magnets through Cyphos IL 104 Extraction

Porous Anion Exchange Membrane for Effective Acid Recovery by Diffusion Dialysis

One-Step Fabrication of Methylthiazole-Functionalized Anion Exchange Membranes for Diffusion Dialysis

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