Development of a new solvent extraction process based on butyl-1-[<i><b>N,N</b></i>-bis(2-ethylhexyl)carbamoyl]nonyl phosphonic acid for the selective recovery of uranium(VI) from phosphoric acid

Miguirditchian, Manuel; Bernier, Gilles; Pacary, V.; Balaguer, C.; Sorel, C.; Berlemont, R.; Fries, B.A.; Bertrand, Murielle; Camès, B.; Leydier, Antoine; Turgis, Raphaël; Arrachart, Guilhem; Pellet‐Rostaing, Stéphane; Mokhtari, Hamid

doi:10.1080/07366299.2016.1169147

Cited by 19 publications

(13 citation statements)

References 20 publications

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“…13,14 Although SF values > 10 are adequate for separation of Dy from Nd, 15 multistage extraction is required for their complete separation. This technique is generally employed in industry to treat large volumes of aqueous solutions by using mixersettler equipment, [16][17][18] but it can also be applied for mutual separation.…”

Section: Introductionmentioning

confidence: 99%

Fundamental Study on Multistage Extraction Using TDdDGA for Separation of Lanthanides Present in Nd Magnets

Sasaki

Morita

Matsumiya

et al. 2021

JOM

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The separation of Dy from Nd has been studied from the viewpoint of recycling Dy from Nd magnets. N,N,N′,N′-tetradodecyl-DGA (TDdDGA) has a relatively high separation factor between Dy and Nd (above 10) in HNO3 medium. After basic research on batchwise multistage extractions using eight extraction stages with 0.1 M TDdDGA in n-dodecane as organic phase, ten stages with an aqueous phase (0.7 M HNO3 with metals), and six stages with another aqueous phase (0.7 M HNO3 without metals), approximately 99% of Dy was recovered into the organic phase with 1% coextraction of Nd.

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Section: Introductionmentioning

confidence: 99%

Fundamental Study on Multistage Extraction Using TDdDGA for Separation of Lanthanides Present in Nd Magnets

Sasaki

Morita

Matsumiya

et al. 2021

JOM

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“…Insert Figure 29 here were calculated by selecting the main equilibria formed in aqueous solution among the different equilibria reported in the literature [114,115]. Miguirditchian et al [116] considered four equilibria to describe uranium speciation in phosphoric media while two equilibria were sufficient for iron (Table 1).…”

Section: Effect Of Flowrates On Flowsheet Performancesmentioning

confidence: 99%

“…Furthermore, DEHCNPB extracts uranium selectively from the other impurities (Mo, V, Al, …) present in genuine industrial phosphoric acid with unequaled performance. This molecule was thus selected for process development[81,82].Since, other "autosynergistic" bifunctional ligands have been recently developed for uranium extraction by substituting the amide donor group of amido phosphonates by a phosphine oxide[83]. Keeping similar alkyl chains than those optimized in the case of DEHCNPB, new phosphine oxide-phosphonate ligands were synthesized and compared with DEHCNPB and the reference D2EHPA/TOPO mixture.…”

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confidence: 99%

New Insights into the Recovery of Strategic and Critical Metals by Solvent Extraction

Love¹,

Miguirditchian²,

Chagnes³

2019

Ion Exchange and Solvent Extraction: Volume 23

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1. INTRODUCTION 2. EXTRACTANT DESIGN 2.1. THE ROLE OF COORDINATION CHEMISTRY AND SUPRAMOLECULAR CHEMISTRY ON THE DESIGN OF NEW EXTRACTANTS 2.1.1. COMPLEX FORMATION 2.1.2. ION PAIRS AND METALATES 2.1.3. REVERSE MICELLES 2.1.4. CONCLUSION 2.2. THE ROLE OF PHYSICOCHEMISTRY FOR A RATIONAL DESIGN OF NEW EXTRACTANTS 2.3. CASE STUDIES 2.3.1. DESIGN OF NEW EXTRACTANTS FOR URANIUM RECOVERY FROM WET PHOSPHORIC ACID 2.3.2. CHEMICAL DESIGN IN GOLD RECOVERY BY URBAN MINING 3. FLOWSHEET OPTIMIZATION 3.1. EFFECT OF FLOWRATES ON FLOWSHEET PERFORMANCES 3.2. INFLUENCE OF DEGRADATION ON FLOWSHEET PERFORMANCE 3.3. COMBINING CHEMISTRY AND ENGINEERING FOR FLOWHEET OPTIMIZATION 3.4. PERSPECTIVE IN THE DEVELOPMENT OF TOOLS FOR FLOWSHEET OPTIMIZATION 4. CONCLUSION 5. REFERENCES

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“…[14] N,P bifunctional extractants such as carbamoylalkylphosphonates involving an amido and a phosphorus functionality and especially the butyl-1-[N,N-bis(2-ethylhexyl)carbamoyl]nonyl phosphonic acid, called DEHCNPB, have shown unprecedented extraction properties for uranium from phosphoric media. [15][16][17][18][19] So far, DEHCNPB efficiency has never been evaluated for uranium extraction from nitric media, and the patented N, P bifunctional family has not been investigated in the literature for this media. In the present study, two amidophosphonates, are therefore studied and compared to both DEHCNPB and TBP as reference extractants.…”

Section: Introductionmentioning

confidence: 99%

Bifunctional Amidophosphonate Molecules for Uranium Extraction in Nitrate Acidic Media

Artese

Dourdain

Felines

et al. 2020

Solvent Extraction and Ion Exchange

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Bifunctional amidophosphonate derivatives, already known as efficient ligands in uranium extraction from phosphoric media, have been evaluated and compared to the conventional trin-butyl phosphate (TBP) for uranium extraction from nitric medium. The efficiency of U extraction and its selectivity towards competing elements such as Th, Zr, Mo, Fe and V was evaluated with various ligand structures. It was found that extractant molecules containing a monosaponified phosphonate moiety instead of phosphonate moieties are less effective and selective. Furthermore, it was observed that alkylation of the methylene bridge linking the two functional groups prevent the formation of precipitates during the uranium loading. Effects of acidity as well as ligand concentration were also investigated to estimate the loading capacity of the molecules. More detailed stoichiometry and transfer energy were further determined by the slope analysis method and a thermodynamic study. The possible uranium recovery from the organic phase has finally been demonstrated thanks to stripping steps at low nitric acid concentration.

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Development of a new solvent extraction process based on butyl-1-[N,N-bis(2-ethylhexyl)carbamoyl]nonyl phosphonic acid for the selective recovery of uranium(VI) from phosphoric acid

Cited by 19 publications

References 20 publications

Fundamental Study on Multistage Extraction Using TDdDGA for Separation of Lanthanides Present in Nd Magnets

Fundamental Study on Multistage Extraction Using TDdDGA for Separation of Lanthanides Present in Nd Magnets

New Insights into the Recovery of Strategic and Critical Metals by Solvent Extraction

Bifunctional Amidophosphonate Molecules for Uranium Extraction in Nitrate Acidic Media

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