, Volume 296, Issue 3, pp 1259-1262
Date: 01 Nov 2012

Extraction of cesium into nitrobenzene by using ammonium and thallium dicarbollylcobaltates in the presence of polypropylene glycol PPG 425

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Extraction of microamounts of cesium by nitrobenzene solutions of ammonium dicarbollylcobaltate (NH4 +B) and thallium dicarbollylcobaltate (Tl+B) in the presence of polypropylene glycol PPG 425 (L) has been investigated. The equilibrium data have been explained assuming that the complexes ML+ (M+ = NH 4 + , TI+, Cs+; L = PPG 425) are present in the organic phase. Furthermore, the stability constants of the cationic complex species NH4L+ and TlL+ in nitrobenzene saturated with water have been determined as log β (NH4L org + ) = 4.58 and log β (TlL org + ) = 5.27.