Tantalum and Niobium Selective Extraction by Alkyl-Acetophenone

Toure, Moussa; Arrachart, Guilhem; Duhamet, Jean; Pellet‐Rostaing, Stéphane

doi:10.3390/met8090654

Cited by 17 publications

(10 citation statements)

References 18 publications

(23 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further purification, by selective extraction of tantalum from an acid leaching solution, has been proposed using ILs instead of an organic solvent in a liquid-liquid extraction process. To emulate the role of the organic solvents used for Ta extraction, such as methyl iso-butyl ketone (MIBK) or tri-butyl phosphate (TBP), ILs were rendered task-specific by functionalizing them with ketone or phosphonate groups, successfully making them selective to tantalum for its extraction from a sulfuric acid leachate [149][150][151].…”

Section: Recycling At the Electronic Components Level: Processes And Opportunitiesmentioning

confidence: 99%

Dismantling of Printed Circuit Boards Enabling Electronic Components Sorting and Their Subsequent Treatment Open Improved Elemental Sustainability Opportunities

et al. 2021

View full text Add to dashboard Cite

This critical review focuses on advanced recycling strategies to enable or increase recovery of chemical elements present in waste printed circuit boards (WPCBs). Conventional recycling involves manual removal of high value electronic components (ECs), followed by raw crushing of WPCBs, to recover main elements (by weight or value). All other elements remain unrecovered and end up highly diluted in post-processing wastes or ashes. To retrieve these elements, it is necessary to enrich the waste streams, which requires a change of paradigm in WPCB treatment: the disassembly of WPCBs combined with the sorting of ECs. This allows ECs to be separated by composition and to drastically increase chemical element concentration, thus making their recovery economically viable. In this report, we critically review state-of-the-art processes that dismantle and sort ECs, including some unpublished foresight from our laboratory work, which could be implemented in a recycling plant. We then identify research, business opportunities and associated advanced retrieval methods for those elements that can therefore be recovered, such as refractory metals (Ta, Nb, W, Mo), gallium, or lanthanides, or those, such as the platinum group elements, that can be recovered in a more environmentally friendly way than pyrometallurgy. The recovery methods can be directly tuned and adapted to the corresponding stream.

show abstract

Section: Recycling At the Electronic Components Level: Processes And Opportunitiesmentioning

confidence: 99%

Dismantling of Printed Circuit Boards Enabling Electronic Components Sorting and Their Subsequent Treatment Open Improved Elemental Sustainability Opportunities

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The formed white wet cake was washed with deionized water, transferred to a glass beaker, and dried in vacuum oven for 48 h at 135°C (WOCT-135) to ensure that all the organic solvents were removed. The dried cakes were placed in a porcelain crucible for calcination at 1050°C for 3 h in a muffle furnace (WOCT-1050) 61,62 . The annealed grey metal oxide was milled and further used after washing in ethanol and distiller water (WOCT) in this study (photo all the extraction process shown on the Supplementary Fig.…”

Section: Mineral Extractionmentioning

confidence: 99%

Extraction of non-noble metal columbite-tantalite as a highly efficient electrocatalyst for water splitting

Bacirhonde¹,

Dzade²,

Chalony³

et al. 2021

Preprint

View full text Add to dashboard Cite

The development of robust and inexpensive electrocatalysts that are capable of catalyzing the overall water splitting reaction is highly essential for large scale production of hydrogen. Herein, we report the successful liquid-liquid extraction and hydrothermal synthesis of a highly stable columbite-tantalite electrocatalysts (Fe0.79Mn0.21Nb0.16Ta0.84O6) with remarkable HER and OER performance in alkaline media. The extracted Fe0.79Mn0.21Nb0.16Ta0.84O6 electrocatalyst shows a low overpotential of 190.2 and 284.8 mV at 10/mA cm-2 in current density in situ for HER and OER, respectively. The electrocatalyst also exhibited low Tafel slopes of 56.36 mV/dec for HER and 112.85 mV/dec for OER, verifying their rapid catalytic kinetics. The electrolyzer maintained the cell voltage of 1.63 V and potential-time stability close to that of Pt/C & RuO2/C. The intrinsic mechanism for the exceptional HER and OER performance was further unravelled through first-principles density functional theory (DFT) calculations, predicting very low Gibbs free energy of hydrogen adsorption (ΔGH* ≈ 0.09 eV) and low overpotential (η = 0.47 eV at the Mn sites) for OER on the Fe0.75Mn0.25Ta1.875Nb0.125O6 catalyst. Our results demonstrate that columbite-tantalite electrocatalysts offer great promise for efficient overall water splitting. Graphical abstract

show abstract

“…The selectivity of the ligands for Ag + relative to Cu 2+ and Pb 2+ was determined as follows 32 : The Ag + complexes of ligand 1 were synthesized following the procedure reported by Daubinet 33 . Briefly, the ligand 1 (1 eq.)…”

Section: Ag + Uptake Studiesmentioning

confidence: 99%

Synthesis and Binding Studies of a Novel Highly Selective Ag(I) Ligand

Aderibigbe¹,

Clark²

2020

Preprint

View full text Add to dashboard Cite

Ligands bearing S-and N-donors are an important class of extractants with demonstrated efficiency and selectivity for Ag + extraction over metals with similar chemistries. However, the synthesis of some of these ligands can be complicated and low yielding. Here, we report the synthesis of a novel ligand -N-(2-((4vinylbenzyl)thio)ethyl)acetamide, over two simple steps and in a good yield. The extractant was observed to demonstrate excellent selectivity for Ag + , extracting only Ag + from an aqueous solution also containing Cu 2+ and Pb 2+ .Moderate extraction efficiencies of 36 % for Ag + and 0% each for Cu 2+ and Pb 2+ were observed. From mass spectrometry and proton NMR titration data, the extractant was found to form both the 1:1 and 1:2 (Ag + :ligand) complexes with Ag + indicating that ligand forms bent linear and tetrahedral coordination complexes with Ag + . Overall, the results indicate that the novel amide-based ligand is highly selective for Ag + removal from aqueous solutions containing Cu 2+ and Pb 2+ . These results indicate the ligand could be easily synthesized and applied for selective silver recovery from low grade ores.

show abstract

Tantalum and Niobium Selective Extraction by Alkyl-Acetophenone

Cited by 17 publications

References 18 publications

Dismantling of Printed Circuit Boards Enabling Electronic Components Sorting and Their Subsequent Treatment Open Improved Elemental Sustainability Opportunities

Dismantling of Printed Circuit Boards Enabling Electronic Components Sorting and Their Subsequent Treatment Open Improved Elemental Sustainability Opportunities

Extraction of non-noble metal columbite-tantalite as a highly efficient electrocatalyst for water splitting

Synthesis and Binding Studies of a Novel Highly Selective Ag(I) Ligand

Contact Info

Product

Resources

About