18-Crown-6 and dibenzo-18-crown-6 assisted extraction of cesium from water into room temperature ionic liquids and its correlation with stability constants for cesium complexes.
The pH-profiles of the extraction of Cs(+) into four conventional (1-butyl-3-methylimidazolium hexafluorophosphate and bis[trifluoromethyl)sulphonyl]imides of 1-butyl-3-methylimidazolium, 1-hexyl-3-methylimidazolium, and 1-(2-ethylhexyl)-3- methylimidazolium) and two novel (trioctylmethylammonium salicylate and tetrahexylammonium dihexylsulfosuccinate) room temperature ionic liquids have been determined both in the absence and in the presence of crown ether (18-crown-6 or dibenzo-18-crown-6). The pH-profiles of distribution ratio of crown ethers have been established in the same conditions. The relationship of cesium extraction efficiency both with the stability of its complexes with crown ethers and crown ethers' distribution ratio has been clarified.
Vendilo
Andrey G
AG
State Research Institute of Reagents and High Purity Substances (IREA), Bogorodskii val 3, 107258, Moscow, Russia. vendilo@ekos-1.ru
Djigailo
Dmitry I
DI
Smirnova
Svetlana V
SV
Torocheshnikova
Irina I
II
Popov
Konstantin I
KI
Krasovsky
Vladimir G
VG
Pletnev
Igor V
IV
D002586:Cesium / Q000302:isolation & purification*; D043844:Crown Ethers / Q000737:chemistry*; D007477:Ions; D009682:Magnetic Resonance Spectroscopy; D013696:Temperature; D014867:Water / Q000737:chemistry*
D043844:Crown Ethers; D007477:Ions; D014867:Water; D002586:Cesium