2 research outputs found

    Synergistic Effect of Acid–Base Coupling Bifunctional Ionic Liquids in Impregnated Resin for Rare Earth Adsorption

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    The synergistic effect produced by ionic liquid extractants in the field of adsorption is first reported here. The data from this work show that the distribution coefficient and synergistic enhancement coefficient of Lu­(III) extracted by [P<sub>66614</sub>]­[EHEHP] and [N<sub>1888</sub>]­[BTMPP] in impregnated resin are pronouncedly higher than those in solvent extraction. The synergistic interplay of combined acid–base coupling bifunctional ionic liquids (ABC-BILs) is the key to the higher adsorption efficiencies of REEs. Moreover, no third phase was observed in the adsorption systems. The elimination of the third phase from ABC-BIL is a remarkable advantage of adsorption over solvent extraction in the present study. This paper reveals efficient and environmently friendly potentials in both of academic research and industrial application for REEs adsorption

    Efficient and Sustainable Regeneration of Bifunctional Ionic Liquid for Rare Earth Separation

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    An effective and sustainable strategy of regeneration is important for the industrial application of functionalized ionic liquid in hydrometallurgy. The transformations of [tri-<i>n</i>-octylmethyl­ammonium]­[bis-sec-octylphenoxyl acetate] ([N<sub>1888</sub>]­[SOPAA]) and [trihexyl (tetradecyl) phosphonium]­[sec-octylphenoxy acetate] ([P<sub>6,6,6,14</sub>]­[SOPAA]) under acidic and alkaline conditions were investigated. This paper developed a novel approach for sustainable stripping and efficient regeneration of acid–base coupling bifunctional ionic liquid (ABC-BIL) for rare earth element (REE) separation. After the stripping using deionized water, both NaOH and Na<sub>2</sub>C<sub>2</sub>O<sub>4</sub> were indicated to be effective for the regeneration of organic phase containing [N<sub>1888</sub>]­[SOPAA]. In order to recycle REE, the precipitates of REE­(OH)<sub>3</sub> and REE<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>)<sub>3</sub> were analyzed, and a sedimentation–calcination strategy was proposed. The investigation of sedimentation–calcination also offered a promising method for the preparation of REE nanomaterial
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