Organic Phase Speciation of 36% Tri-Iso Amyl Phosphate/N-Dodecane Solvent during Nitric Acid Extraction

Abstract

Several solutions of 36% TiAP/n-dodecane solvent were equilibrated with different concentrations of aqueous nitric acid solutions at 298.15 K at a phase ratio of unity. The resultant equilibrated aqueous and organic solutions were analyzed for acidity. A three-solvate model with molecular HNO₃ based mechanism was assumed for nitric acid extraction by TiAP. This model was analogous to the 3-solvate model for nitric acid extraction by TBP, recently reported by authors. With nonlinear chemometric methods, the coefficients of the model equations were evaluated. With the set of optimized coefficients, derived on the basis of experiments reported in this work, the estimated organic acidity and the experimental acidity of the organic phase were in good agreement.

Keywords: Alternate PUREX solvent, TiAP, stoichiometry, nitric acid solvates, speciation

 Cite this Article

Srivastav Ravi Kant, Balasubramonian S., Shekhar Kumar et al. Organic Phase Speciation of 36% Tri-Iso Amyl Phosphate/N-Dodecane Solvent During Nitric Acid Extraction, Journal of Nuclear Engineering and Technology. 2015; 5(2): 28–34p.