Purification of Crude Phosphoric Acid and Leached Apatite by Solvent Extraction with CYANEX 923 in Kerosene

  • Ismail M. Ahmed Hot Laboratories Centre, Atomic Energy Authority, Cairo, Egypt
  • Romany N. Ammanoeil Faculty of Science, Ain Shams University, Cairo, Egypt
  • Ebtissam A. Saad Faculty of Science, Ain Shams University, Cairo, Egypt
  • Jacqueline A. Daoud Hot Laboratories Centre, Atomic Energy Authority, Cairo, Egypt

Abstract

CYANEX 923 (a mixture of four trialkylphosphine oxides) in kerosene has been used for the extraction of phosphoric acid. Different parameters affecting the extraction of phosphoric acid such as shaking time, temperature, phase ratio O/A, extractant and phosphoric acid concentration were separately investigated. The stoichiometry of the extracted species was found to be H3PO4.L, where L refers to CYANEX 923. The stripping of the extracted species was found to be efficient with water. The obtained results were used for the recovery of phosphoric acid from both the crude acid and the leached solution from digestion of apatite phosphate rock with hydrochloric acid. Expanded Perlite was found to be efficient for the adsorption of uranium from both crude acid and the leached apatite.

Keywords: Phosphoric acid, Purification, Solvent extraction, CYANEX 923, Apatite ore, Perlite
Published online
2018-03-20
How to Cite
Ahmed, I., Ammanoeil, R., Saad, E. and Daoud, J. (2019) “Purification of Crude Phosphoric Acid and Leached Apatite by Solvent Extraction with CYANEX 923 in Kerosene”, Periodica Polytechnica Chemical Engineering, 63(1), pp. 122-129. doi: https://doi.org/10.3311/PPch.11626.
Section
Articles