2 documents found, page 1 of 1
A HNO3-responsive aqueous biphasic system for metal separation: application tow...
Schaeffer, Nicolas; Vargas, Silvia J. R.; Passos, Helena; Brandão, Paula; Nogueira, Helena I. S.; Svecova, Lenka; Papaiconomou, NicolasAn acidic aqueous biphasic system (AcABS) presenting a desired and reversible phase transition with HNO3 concentration and temperature was developed herein as an integrated platform for metal separation. The simple, economical, and fully incinerable (C,H,O,N) AcABS composed of tetrabutylammonium nitrate ([N4444][NO3])+HNO3 +H2O was characterized and presented an excellent selectivity towards CeIV against other ...
Integrated leaching and separation of metals using mixtures of organic acids an...
Vargas, Silvia J. R.; Passos, Helena; Schaeffer, Nicolas; Coutinho, João A. P.In this work, the aqueous phase diagram for the mixture of the hydrophilic tributyltetradecyl phosphonium ([P44414]Cl) ionic liquid with acetic acid (CH3COOH) is determined, and the temperature dependency of the biphasic region established. Molecular dynamic simulations of the [P44414]Cl + CH3COOH + H2O system indicate that the occurrence of a closed "type 0" biphasic regime is due to a "washing-out" phenomenon...