Extraction of the uranyl ion from the aqueous phase into an ionic liquid by diglycolamide

Ionic Liquids in Separation of Metal Ions from Aqueous Solutions

“…1). The same observations have been made by Shen et al (2011) for UO 2 2+ extraction with other diglycolamides (TBDA -N,N,N',N'-tetrabutyl-3-oxapentanediamide and MBDA -N,N,N',N'-dimethyldibutyl-3-oxapentanediamide). It can be concluded that the change in extraction mechanism depends on the acid (in this case HNO 3 ) concentration.…”

Liquid-liquid extraction of lithium using lipophilic dibenzo-14-crown-4 ether carboxylic acid in hydrophobic room temperature ionic liquid

“…6b) from the results in Fig. 5 would also yield the same constants if the pH remain unchanged (Lertlapwasin et al, 2010;Mohapatra et al, 2007;Shen et al, 2011;Turanov et al, 2010). Slope from the log D Li + vs equilibrium pH (Fig.…”

“…A slope n N 1 suggests that the extraction did not strictly follow 1:1 Li + coordination with DB14C4-C18-COOH; higher ordered 2:1 coordination of Li + between two DB14C4-C18-COOH might have also occurred (Pranolo et al, 2015;Shen et al, 2011). Nonetheless, log D Li + vs pH had higher linearity (r 2 N 0.998) thus 1:1 Li + complexation with the CE most likely took place.…”

“…A recent report effectively utilized a room temperature ionic liquid (RTIL) CYPHOSIL 109 as a stable organic matrix in LLE for Li + recovery (Torrejos et al, 2014b). The RTILs like CYPHOSIL 109 are dubbed as ideal green solvents due to its negligible vapor pressure, high thermal stability, and high ionic conductivity (Lertlapwasin et al, 2010;Shen et al, 2011;Torrejos et al, 2014b;Turanov et al, 2010;Visser et al, 2001Visser et al, , 2000Wellens et al, 2012).…”

Ionic Liquid and Supercritical Fluid Hyphenated Techniques for Dissolution and Separation of Lanthanides, Actinides, and Fission Products

“…24 Extraction of uranyl ion from the aqueous phase into [C n mim][PF 6 ] (n = 4, 6, and 8) using N,N,N'N'-tetrabutyldiglycolamide (TBDGA) as an extractant was also investigated and the complex was found to have a ratio of TBDGA : UO 2 2+ = 2:1. 25 The mechanism of these aqueous-IL extractions has been suggested to involve cation-exchange. 24 in sc-CO 2 were determined using a high pressure fiber-optic cell connected to a CCD array UVVis spectrometer.…”