Task-Specific Ionic Liquids as Extractants for the
Solvent Extraction of Molybdenum(VI) from Aqueous Solution Using Different
Commercial Ionic Liquids as
Diluents
Esteban Quijada-Maldonado
Felipe Sánchez
Bárbara Pérez
Ricardo Tapia
Julio Romero
10.1021/acs.iecr.7b04147.s001
https://acs.figshare.com/articles/journal_contribution/Task-Specific_Ionic_Liquids_as_Extractants_for_the_Solvent_Extraction_of_Molybdenum_VI_from_Aqueous_Solution_Using_Different_Commercial_Ionic_Liquids_as_Diluents/5820702
In
this work, the recovery of molybdenum(VI) (Mo) from aqueous
solutions was carried out by solvent extraction (SX) using ammonium
and phosphonium-based task-specific ionic liquids (TSILs) as extractants
diluted in kerosene and two other hydrophobic room-temperature ionic
liquids (RTILs). Four different TSILs were used as extractants: trioctylmethylammonium
bis(2-ethylhexyl) phosphate [TOMA][D2EHP]; trioctylmethylammonium
benzoate [TOMA][BA]; trihexyltetradecylphosphonium bis(2-ethylhexyl)
phosphate [P<sub>6,6,6,14</sub>][D2EHP]; and trihexyltetradecylphosphonium
benzoate [P<sub>6,6,6,14</sub>][BA]. These TSILs were synthesized
to assess the effect of the cation and anion on the SX of Mo(VI).
Experimental results indicated that high extraction percentages of
Mo(VI) were obtained with all the synthesized TSILs. Besides that,
the best cation was [TOMA]<sup>+</sup> for all the diluents and [BA]<sup>−</sup> was the best anion when kerosene and 1-octyl-3-methylimidazolium
bis(trifluoromethylsulfonyl)imide, [omim][Tf<sub>2</sub>N], were the
diluents. Furthermore, the SX process using these ionic liquids followed
an anion-exchange mechanism for kerosene and [omim][Tf<sub>2</sub>N] as diluents. Finally, the stripping was successfully performed
with a solution of ammonium carbonate, and the extent of stripping
depended on the selected diluent.
2018-01-11 00:00:00
BA
phosphonium-based task-specific
diluents
2EHP
solution
ammonium carbonate
trioctylmethylammonium
TSIL
Mo
bi
Aqueous Solution
omim
Solvent Extraction
Different Commercial
trihexyltetradecylphosphonium benzoate
kerosene
phosphate
extraction percentages
RTIL
cation
extractant
anion-exchange mechanism
SX process
TOMA