Skip to main content
SpringerLink
Log in

Effect of oxidation-reduction on the extraction of uranium from wet phosphoric acid by DEHPA/TOPO

  • Published:
Journal of Radioanalytical and Nuclear Chemistry Aims and scope Submit manuscript

Abstract

Uranium is recovered from wet phosphoric acid by DEHPA/TOPO in kerosene. Uranium is present in wet phosphoric acid in the tetravalent and hexavalent states but DEHPA/TOPO extracts uranium in the hexavalent state only. The ratio of U4+/U6+ depends on several factors such as the origin of the phosphate rock, the method of preparation of phosphoric acid and the presence of other impurities. Therefore it is important to oxidize the wet acid to convert all uranium to U6+ before extraction. Uranium is stripped from the solvent by a reverse process where a concentrated phosphoric acid is used under reducing conditions. This paper studies the oxidation of wet phosphoric acid from Homs plant/Syria by H2O2 oxidant and the effect of oxidation on extraction coefficientK. It also studies the reduction by iron and its effect on back extraction of uranium from the solvent to phosphoric acid.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. SPILIARD, Ind. Miner, Avril (1984) 342.

  2. A.P. KOULEHERIS, Chem. Eng., 87 (1980) 82.

    Google Scholar 

  3. AUSTIN, Chem. Eng., (1982) 195.

  4. R. S. LONG, Proc. Intern. Conf. on Peaceful Uses of Atomic Energy, Geneva, 1955., Vol. 8, New York, 1956, p. 77.

  5. MSATEF, Aperçu Sur l'Etat d'Avancement de la Recuperation de l'Uranium à Partir de l'Acid Phosphoric, 5e Congrès Arabe sur les Resources Minérales, Khartoum, 1985.

  6. A. DELEON, Possibility for Recovery of Uranium as a Byproduct in the Production of Phosphate Fertilizers, IAEA-SM-135, p. 39.

  7. SURBER, Extraction of Uranium from Phosphate, AIChE, 74th Annual Meeting, New Orleans, Nov. 8–12, 1981.

  8. BERRY, Chem. Eng. Prog., 77 (1981) 76.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Atomic Energy Commission, P.O. Box 1169, Damascus, (Syria)

    Y. Koudsi, S. Khorfan, H. Shlweit, A. Dahdouh & M. Sweid

Authors
  1. Y. Koudsi
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. S. Khorfan
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. H. Shlweit
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. A. Dahdouh
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. M. Sweid
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Koudsi, Y., Khorfan, S., Shlweit, H. et al. Effect of oxidation-reduction on the extraction of uranium from wet phosphoric acid by DEHPA/TOPO. Journal of Radioanalytical and Nuclear Chemistry, Articles 198, 237–245 (1995). https://doi.org/10.1007/BF02038261

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02038261

Keywords

Search

Navigation