Solvent extraction of europium(iii) to a fluorine-free ionic liquid phase with a diglycolamic acid extractant

Abstract

Bis(2-ethylhexyl)diglycolamic acid (DEHDGA) dissolved in the fluorine-free ionic liquid tetraoctylammonium dodecyl sulphate, [N8888][DS] is an efficient extractant for europium(iii).

Application of Ionic Liquids in Hydrometallurgy

“…Moreover, ionic liquids can be directly used as electrolyte for the electrowinning of dissolved metal ions because they have high ionic conductivity and wide potential windows enabling the electrolytic reduction of various metals. Meanwhile, Tian et al [ 24 ] and Binnemans et al [ 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ] focused on the usage of ionic liquids in the extraction of nonferrous metals, which broadened the application of ionic liquids from precious metals to light and rare earth metals. In particular, in the separation between rare earth metals and transition metals, Binnemans et al have investigated many combinations of metals and ionic liquids in the liquid-liquid extraction so far.…”

Phosphonium salts and P-ylides

“…This was a new iono-metallurgical approach for the processing of metals in ionic liquids. 201 Other applications include the development of a fluorine-free solvent for the extraction of europium(III) and other trivalent rare earth ions using trihexyl(tetradecyl)phosphonium N,N,N 0 ,N 0 -tetra ( 203 Also of note is the use of mutually immiscible ILs such as 1-ethyl-3-methylimidazolium chloride and [P 66614 ] bis(2,4,4-trimethylpentyl) phosphinate to extract rare earths, 204 the development of a process using [P 66614 ][NO 3 ] to extract rare earths and separate them from nickel or cobalt, 205 and the use of [P 66614 ]Cl for selective extraction and recycling of metals from nickel metal hydride batteries 206 and rare-earths from NdFeB magnets. 207 Extraction of rare earth ions was also studied by Matsumiya et al 208 using tri-n-butylphosphate in combination with [P 2225 ][TFSA].…”

Understanding the Dynamics of Eu3+ Ions in Room‐Temperature Ionic Liquids – Electrochemical and Time‐Resolved Fluorescence Spectroscopy Studies

“…There are several reports on the electrochemistry and spectroscopic behavior of Eu 3+ ions in various types of RTIL in which the authors have either discussed the two aspects together or separately. [14][15][16][17][18][19][20][21][22] Time-resolved fluorescence spectroscopy (TRFS) is one technique that is used extensively to understand the coordination environment of metal ions such as Eu 3+ and Cm 3+ . [23,24] Though the chemistry of trivalent lanthanides and actinides appears similar in aqueous systems, they can behave quite differently in ionic liquids.…”