Inderscience Publishers

Separation of uranium from weak phosphoric acid using di-nonyl phenyl phosphoric acid in combination with tri-n-butyl phosphoric acid

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A process has been described for the extraction of uranium from weak phosphoric acid using di-nonyl phenyl phosphoric acid in combination with synergistic reagent tri-n-butyl phosphate. The effect of process parameters including concentrations of extractant and phosphoric acid has been studied. A plausible extraction mechanism has been established using slope analysis technique. The enthalpy change for extraction process, ΔH, was determined for the solvent with and without synergistic reagent. Based on the optimised parameters batch counter current extraction and stripping have been studied and the uranium recovery was found to be ∼80%.

Keywords: solvent extraction, uranium extraction, phosphoric acid, di-nonylphenylphosphoric acid, tri butyl phosphate, nuclear fuel, nuclear energy, nuclear power

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