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Title: Ion-pair extraction of uranium(VI) using N-cinnamoyl-o-tolyl hydroxylamine in presence of tri-n-octyl phosphine oxide in chloroform and hexafluorophosphoric acid
Authors: Sarkar, Jaya
Bag, Saswati P
Issue Date: Mar-1997
Publisher: NISCAIR-CSIR, India
Abstract: N-cinnamoyl-o-tolylbhydroxylamine (CT0HA.HL) forms extractable binary complex with uranium. The extracted complex, UO2L2(0) when shaken with tri-n-octylphosphine oxide (TOPO R) in chloroform, is gradually back-extracted into aqueous phase due to formation of the cationic complex, UO2LR +. The gradual substitution has been followed spectrophotometrically by the decrease in absorbance of UO2L2(0) Uranium(VI) can be extracted into the chloroform phase by formation of ion-pair [UO2LR + .PF)0 of UO2LR + with the anion hexafluorophosphate. Extraction of the ion-pair complex is followed by enhanced absorbance values. The substitution constant. Ka and ion-pair constant, KI, have been evaluated to be 0.075 and 2.05 x 103 respectively.
Page(s): 244-246
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.36A(03) [March 1997]

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