Lithium isotope separation using displacement chromatography by cation exchange resin with high degree of cross-linkage

Putra, Andri Rahma; Tachibana, Yu; Tanaka, Masahiro; Suzuki, Tatsuya

doi:10.1016/j.fusengdes.2018.02.045

Cited by 23 publications

(27 citation statements)

References 14 publications

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“…The commodity value of lithium, which is one of the 31 rare metal elements among the 118 elements is on an upward trend to the industrial importance of Li ion batteries, 1) Li-7 salt used * Corresponding author E-mail: yu_tachibana@vos.nagaokaut.ac.jp year by year. The industrial arena pays a great deal of attention as pH controller in pressurized water reactors 2) and Li-6 as a raw material of tritium production for fusion future reactors 2) . Therefore, a large amount of Li must be certainly required for…”

Section: Introductionmentioning

confidence: 99%

Selective Lithium Recovery from Seawater Using Crown Ether Resins

Tachibana

Suzuki

Nogami

et al. 2018

J.I.E.

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Seven kinds of crown ether resins embedded in high-porous silica beads, benzo-12-crown-4 (BC12), dibenzo-14-crown-4 (DBC14), benzo-15-crown-5 (BC15), benzo-18-crown-6 (BC18), dibenzo-18-crown-6 (DBC18), dibenzo-21-crown-7 (DBC21), and dibenzo-22-crown-6 (DBC22) resins, were synthesized successfully and the adsorption behavior of Li ion on these crown ether resins have been studied in seawater at room temperature. As a result, it was found that the ascending order of the distribution coefficients (K d) values of Li ion using the seven crown ether resins are DBC14 < BC12 DBC21 DBC18 < DBC22 < BC18 ≤ BC15 and the BC15 resin has comparatively higher adsorption ability for Li ion. Hence, the adsorption behavior of Li ion using the BC15 resin has been examined in detail. It can be seen that the K d values of Li ion with the BC15 resin increase sharply with increasing the pH 1.5 to 2.7 in seawater due to the dependence of H + for the adsorption reaction. The K d values of Li ion increased sharply with increasing the concentration factor (CF) of seawater in order of 0.10, 0.20, 0.33, 0.50, 1.0 while the K d value of CF = 1.5 of seawater decreased certainly. The decrease is attributable to the adsorption reactions between the BC15 resin and the main cationic ions. The tendency indicates that the BC15 resin has wonderful selective adsorption ability for Li ion in the wide concentration range of seawater. In addition, we have examined the thermodynamics (Temp. = 278-333 K) of Li ion on the BC15 resin in seawater by using Van't Hoff equation. The results also imply that the equilibrium adsorption process between the BC15 resin and Li ion is found to be endothermic and the spontaneous reaction mechanism in nature. From these results, we have proposed that the BC15 resin is available for selective recovery of Li ion from various seawater in the wide temperature range.

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Section: Introductionmentioning

confidence: 99%

Selective Lithium Recovery from Seawater Using Crown Ether Resins

Tachibana

Suzuki

Nogami

et al. 2018

J.I.E.

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“…Lithium (Li), which is one of the 31 rare metal elements among the 118 elements, is subject to increasing demand precipitously and the trend is enhancing the marketability of Li year by year. Industrial consequences of Li ion batteries 1) , Li-7 salt used as pH controller in pressurized water reactors 2) and Li-6 as a law material of tritium production for nuclear fusion * Corresponding author E-mail: yu_tachibana@vos.nagaokaut.ac.jp reactors 2) are above suspicion. Therefore, a large amount of Li must be certainly required for such applications.…”

Section: Introductionmentioning

confidence: 99%

“…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%

“…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. 2) Hence, the use of Li-6 is preferable.…”

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%

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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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A Comprehensive Review of Selected Major Categories of Lithium Isotope Separation Techniques

Murali

Zhang

Free

et al. 2021

Physica Status Solidi (a)

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The ability to generate materials with an enriched isotopic abundance, that is one that differs from natural abundance, is critical in terms of technology. Isotopes are used in a wide range of applications, including radioactive tracers, nondestructive tests, radiotherapy in human medicine, nuclear fuels, and isotope-substituted compounds for chemistry and biology research, as well as environmental geochemical signature tracers. A commonly discussed research topic is the isotopic separation of various elements-uranium, hydrogen, lithium, and iodine, among many others. Among these isotopes, lithium isotopes are especially important in various applications including strategic areas. These isotopes are light and hence their separation techniques are not very obvious. Herein, all the main categories of Li isotope separation are reviewed in depth with a focus on electrochemical technologies for stable lithium isotope separation.

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Lithium isotope separation using displacement chromatography by cation exchange resin with high degree of cross-linkage

Cited by 23 publications

References 14 publications

Selective Lithium Recovery from Seawater Using Crown Ether Resins

Selective Lithium Recovery from Seawater Using Crown Ether Resins

Lithium Isotope Fractionation in Weak Basic Solution Using Cation Exchange Chromatography

A Comprehensive Review of Selected Major Categories of Lithium Isotope Separation Techniques

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