2 research outputs found
Synergistic Effect of Acid–Base Coupling Bifunctional Ionic Liquids in Impregnated Resin for Rare Earth Adsorption
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 LuÂ(III) extracted by [P<sub>66614</sub>]Â[EHEHP] and
[N<sub>1888</sub>]Â[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
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>-octylmethylÂammonium]Â[bis-sec-octylphenoxyl
acetate] ([N<sub>1888</sub>]Â[SOPAA]) and [trihexyl (tetradecyl)
phosphonium]Â[sec-octylphenoxy acetate] ([P<sub>6,6,6,14</sub>]Â[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>]Â[SOPAA]. In order
to recycle REE, the precipitates of REEÂ(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