Abstract
The extraction of thorium(IV) from perchlorate solutions with di-n-butyldithiophosphoric acid (HBudtp) in various organic solvents occurs through an ion exchange mechanism. The extracted species in the organic phase is an eight-coordinate complex Th(Budtp)4. The higher values of the distribution ratio obtained in HBudtp-benzene-water system than in HBudtp-n-butanol-water system are explained by higher solubility of the complex species in nonpolar solvents. The position of the extraction curves in the pH-range lower than 0.7 reduces the complexation of thorium(IV) with Budtp− in the aqueous phase and also the hydrolysis process.
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Curtui, M., Haiduc, I. Solvent extraction of thorium(IV) with dibutyldithiophosphoric acid in various organic solvents. Journal of Radioanalytical and Nuclear Chemistry Letters 186, 273–280 (1994). https://doi.org/10.1007/BF02162758
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DOI: https://doi.org/10.1007/BF02162758