High-efficiency technology for lithium isotope separation using an ionic-liquid impregnated organic membrane

Hoshino, Tsuyoshi; Terai, Takayuki

doi:10.1016/j.fusengdes.2011.03.090

Cited by 65 publications

(29 citation statements)

References 13 publications

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“…Nie et al 12 showed that ED could be used to effectively separate Li + from brine solution containing a high concentration of Mg 2+ with a Li + recovery of 95.3%; however, the recovery substantially dropped to around 20% after three hours of ED when K + and Na + were added to the feed. Recently, in a series of reports, Hoshino et al 13–15 used organic membranes impregnated with an ionic liquid for Li + separation. However, the poor durability of the ionic liquid membrane was identified as the main issue for stable long-term Li + recovery 16 .…”

Section: Introductionmentioning

confidence: 99%

Design principles of ion selective nanostructured membranes for the extraction of lithium ions

et al. 2019

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It is predicted that the continuously increasing demand for the energy-critical element of lithium will soon exceed its availability, rendering it a geopolitically significant resource. The present work critically reviews recent reports on Li+ selective membranes. Particular emphasis has been placed on the basic principles of the materials’ design for the development of membranes with nanochannels and nanopores with Li+ selectivity. Fundamental and practical challenges, as well as prospects for the targeted design of Li+ ion-selective membranes are also presented, with the goal of inspiring future critical research efforts in this scientifically and strategically important field.

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Section: Introductionmentioning

confidence: 99%

Design principles of ion selective nanostructured membranes for the extraction of lithium ions

et al. 2019

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“…Hoshino and Terai [45] synthesized organic membranes impregnated with ionic liquid (N-methyl-N-propylpiperidium bis (trifluoromethanesulfonyl) imide: PP13-TFSI) for Li isotopes separation ( 6 Li and 7 Li). This membrane was later used by Hoshino [34] for the recovery of Li + from seawater by the ED process.…”

Section: Introductionmentioning

confidence: 99%

Lithium-Sodium Separation by a Lithium Composite Membrane Used in Electrodialysis Process: Concept Validation

et al. 2022

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The recent expansion of global Lithium Ion Battery (LIBs) production has generated a significant stress on the lithium demand. One of the means to produce this element is its extraction from different aqueous sources (salars, geothermal water etc.). However, the presence of other mono- and divalent cations makes this extraction relatively complex. Herein, we propose lithium-sodium separation by an electrodialysis (ED) process using a Lithium Composite Membrane (LCM), whose effectiveness was previously demonstrated by a Diffusion Dialysis process (previous work). LCM performances in terms of lithium Recovery Ratio (RR(Li+)) and Selectivity (S(Li/Na)) were investigated using different Li+/Na+ reconstituted solutions and two ED cells: a two-compartment cell was chosen for its simplicity, and a four-compartment one was selected for its potential to isolate the redox reactions at the electrodes. We demonstrated that the four-compartment cell use was advantageous since it provided membrane protection from protons and gases generated by the electrodes but that membrane selectivity was negatively affected. The impact of the applied current density and the concentration ratio of Na+ and Li+ in the feed compartment ([Na+]F/[Li+]F) were tested using the four-compartment cell. We showed that increasing the current density led to an improvement of RR(Li+) but to a reduction in the LCM selectivity towards Li+. Increasing the [Na+]F/[Li+]F ratios to 10 had a positive effect on the membrane performance. However, for high values of this ratio, both RR(Li+) and S(Li/Na) decreased. The optimal results were obtained at [Na+]F/[Li+]F near 10, where we succeeded in extracting more than 10% of the initial Li+ concentration with a selectivity value around 112 after 4 h of ED experiment at 0.5 mA·cm−2. Thus, we can objectively estimate that the concept of this selective extraction of Li+ from a mixture even when concentrated in Na+ using an ED process was validated.

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“…Therefore, an artificial T breeding method has been demanded widely. For the T breeding, Li-6 enrichment is required since T could be generated from the 6 Li (n, α) T reaction 2) . Even though Li-7 could produce T by the 7 Li (n, n'α) T reaction as well, this makes Li-7 undesirable for T breeding because of the smaller cross-section values.…”

Section: Introductionmentioning

confidence: 99%

“…Although this method has the high value of Li isotope separation coefficient, the large amount of mercury which is hard to control comparatively is used and wasted from the site 5) . Therefore, recently, various Li isotope enrichment methods with mercury-free, membrane separation 6,7) , electrochemical separation 8) , solvent extraction using crown ether 9) , and chromatography using various cation exchange resins 2,10) have been examined all over the world. In these methods, the cation exchange technique is one of the promising methods to obtain the practically high Li isotope separation coefficient since the existing chemical engineering techniques are applied sufficiently 2,[10][11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

Lithium Isotope Fractionation in Weak Basic Solution Using Cation Exchange Chromatography

Tachibana

Putra

Hashimoto

et al. 2018

J.I.E.

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We have examined the effect of the mixing ratio of methyl benzoate (MB) and bis(2ethylhexyl)phthalate (DEHP) in the synthetic process on the Li isotope fractionation in the cation exchange reaction. MB / DEHP volume mixing ratios were adjusted to 1 / 9 and 9 / 1. For the purpose, the two kinds of porous-type cation exchange resins with the cross-linkage of 50 wt% degree were synthesized by suspension polymerization. Both the particle size distribution was found to be similar in the synthetic processes. On the other hand, it was found that the surface structure from the condition; MB : DEHP = 1 : 9 is much rougher than that from the condition; MB : DEHP = 9 : 1, judging from the SEM images. Based on this result, the Li isotope fractionation experiments using two kinds of poroustype sulfonated styrene-divinylbenzene resins were performed in the weak basic solution at 298 K. We have confirmed that the Li isotope separation phenomena by confirming a sharp boundary on the chromatographic curve at each band-end where lighter Li isotope are enriched in the resin phase and heavier Li isotope is enriched in the aqueous phase. Two kinds of Li isotope separation coefficients (ε) per unit mass (ε/ Mass) values were respectively 3.3 × 10 -3 for MB : DEHP = 1 : 9 and 1.7 × 10 -3 for MB : DEHP = 9 : 1 in spite of the same cross-linkage degree. Therefore, we have concluded that the much rougher surface structure of the resins is very important parameter to improve ε/ Mass values in the Li isotope cation exchange reactions.

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High-efficiency technology for lithium isotope separation using an ionic-liquid impregnated organic membrane

Cited by 65 publications

References 13 publications

Design principles of ion selective nanostructured membranes for the extraction of lithium ions

Design principles of ion selective nanostructured membranes for the extraction of lithium ions

Lithium-Sodium Separation by a Lithium Composite Membrane Used in Electrodialysis Process: Concept Validation

Lithium Isotope Fractionation in Weak Basic Solution Using Cation Exchange Chromatography

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