Recovery of lanthanides from digested phosphogypsum solutions using a new organophosphorus extractant, 5-(diphenylphosphoryl)hexan-3-one

Сафиулина, А. М.; Матвеева, А. Г.; Евтушенко, А. В.; Лизунов, А. В.; Goryunov, E. I.; Goryunova, I. B.; Бодрин, Г. В.; Semenov, A. A.; Brel, V. K.

doi:10.1134/s1070363215090170

Cited by 17 publications

(3 citation statements)

References 18 publications

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“…[11][12][13][14] A third approach is to design new ligands for the extraction of metals. [15][16][17] Undiluted ionic liquids are starting to attract more and more attention for the separation and puri-cation of REEs. 11,[18][19][20][21][22][23] All these research efforts are focusing on modications of the existing aqueous and organic phase in conventional solvent extraction systems.…”

Section: Introductionmentioning

confidence: 99%

Separation of rare-earth ions from ethylene glycol (+LiCl) solutions by non-aqueous solvent extraction with Cyanex 923

et al. 2017

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The separation of a mixture of rare earths by non-aqueous solvent extraction with two immiscible organic phases has been studied. The more polar organic phase was ethylene glycol with dissolved lithium chloride and the less polar organic phase was the extractant diluted in n-dodecane. Cyanex 923 was found to be the most performant extractant amongst the investigated acidic, basic and solvating extractants: Cyanex 272, Cyphos IL 101, Aliquat 336, bis(2-ethylhexyl)amine, trioctylphosphine oxide (TOPO) and Cyanex 923. The replacement of the aqueous chloride feed solutions by non-aqueous ethylene glycol feed solutions had a profound effect on the distribution ratios and separation factors. The separation factors for extraction of pairs of rare earths from aqueous chloride solutions by Cyanex 923 are too low to be of practical use.On the contrary, a mixture of rare earths can be separated conveniently in four different groups by extraction with Cyanex 923 from ethylene glycol (+LiCl) solutions. The influence of several parameters such as the chloride concentration, the type of chloride salt, the addition of other polar solvents to the ethylene glycol phase, the addition of second extractant to the less polar organic phase, and the addition of complexing agents to the ethylene glycol phase has been studied. The extraction mechanism for extraction of ytterbium(III) was studied by slope analysis experiments. The ytterbium(III) species in the ethylene glycol phase and the extracted species in the n-dodecane phase were determined by EXAFS.Furthermore, a conceptual flow sheet for the fractionation of rare earths from an ethylene glycol (+LiCl) feed solution into different groups by extraction with Cyanex 923 has been proposed. The new extraction system is useful for extraction of scandium and for separation of scandium from the other REEs.

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Section: Introductionmentioning

confidence: 99%

Separation of rare-earth ions from ethylene glycol (+LiCl) solutions by non-aqueous solvent extraction with Cyanex 923

et al. 2017

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“…Pure CaCO 3 can be used in a wide range of commercial and industrial applications such as for the manufacturing of concrete (Portland cement) and production of lime (soil stabilization and acid neutralization), water treatment and flue gas desulfurization [64]. CaCO 3 produced from PG processing has been found to be richly concentrated in REEs originally present in the PG waste [65]. This processing is therefore considered as an interesting method of up-concentrating REE prior to their recovery through dissolution of CaCO 3 using mineral acids followed by extraction [62].…”

Section: Carbonationmentioning

confidence: 99%

Rare Earths’ Recovery from Phosphogypsum: An Overview on Direct and Indirect Leaching Techniques

et al. 2021

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The need for rare earths elements (REEs) in high tech electrical and electronic based materials are vital. In the global economy, deposits of natural REEs are limited except for countries such as China, which has prompted current attempts to seek alternative resources of REEs. This increased the dependence on major secondary rare earth-bearing sources such as scrap alloy, battery waste, spent catalysts, fly ash, spent magnets, waste light-emitting diodes (LEDs), and phosphogypsum (PG) for a substantial recovery of REEs for use. Recycling of REEs from these alternative waste sources through hydrometallurgical processes is becoming a sustainable and viable approach due to the low energy consumption, low waste generation, few emissions, environmentally friendliness, and economically feasibility. Industrial wastes such as the PG generated from the production of phosphoric acid is a potential secondary resource of REEs that contains a total REE concentration of over 2000 mg/kg depending upon the phosphate ore from which it is generated. Due to trace concentration of REEs in the PG (normally < 0.1% wt.) and their tiny and complex occurrence as mineral phases the recovery process of REE from PG would be highly challenging in both technology and economy. Various physicochemical pre-treatments approaches have been used up to date to up-concentrate REEs from PG prior to their extraction. Methods such as carbonation, roasting, microwave heating, grinding or recrystallization have been widely used for this purpose. This present paper reviews recent literature on various techniques that are currently employed to up-concentrate REs from PG to provide preliminary insight into further critical raw materials recovery. In addition, the advantages and disadvantages of the different strategies are discussed as avenues for realization of REE recovery from PG at a larger scale. In all the different approaches, recrystallization of PG appears to show promising advantages due to both high REE recovery as well as the pure PG phase that can be obtained.

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“…В работе[6] показано, что II является наиболее эффективным и селективным экстрагентом для извлечения и разделения тяжелых (Ho, Yb) и легких (La, Nd) лантанидов из азотнокислых растворов в хлороформ. Были проведены исследования процесса экстракции редкоземельных элементов (РЗЭ) с помощью соединения II из раствора вскрытия фосфогипса[7] и эвдиалитового концентрата[6,8]. Первоначально положительный эффект указанной выше трансформации фосфорилкетонов был выявлен в модельных экспериментах по экстракции ряда f-элементов из азотнокислых растворов в хлороформ.…”

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Extraction and Complexing Properties of Phosphoryl Ketones With Respect to Actinides and Lanthanides

Сафиулина¹,

Лизунов²,

Goryunov³

et al. 2023

TKSC RAS

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The paper summarizes the results of studies of the complexing properties of phosphoryl ketones with respect to actinides and lanthanides, which makes it possible to identify the most effective and selective ligand of the phosphoryl ketones class, namely 5-(diphenylphosphoryl)hexan-3-one. Using this ligand, the possibility of efficient extraction of rare earth metals, as well as uranium(VI) and thorium(IV) from phosphogypsumleaching solutions within a single stage technological extraction process was demonstrated and the efficiency of using 5-(diphenylphosphoryl)hexan-3-one as extractant with commercially available TBP and TOPO was performed.

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Recovery of lanthanides from digested phosphogypsum solutions using a new organophosphorus extractant, 5-(diphenylphosphoryl)hexan-3-one

Cited by 17 publications

References 18 publications

Separation of rare-earth ions from ethylene glycol (+LiCl) solutions by non-aqueous solvent extraction with Cyanex 923

Separation of rare-earth ions from ethylene glycol (+LiCl) solutions by non-aqueous solvent extraction with Cyanex 923

Rare Earths’ Recovery from Phosphogypsum: An Overview on Direct and Indirect Leaching Techniques

Extraction and Complexing Properties of Phosphoryl Ketones With Respect to Actinides and Lanthanides

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