Upgrading of the Crude Yellow Cake to a Highly Purified Form using Tris (2-ethylhexyl) Phosphate in Presence of EDTA or CDTA

Amr Hamdy Ali; Ahmed Atef Eliwa; Mohammed Sobbhy Hagag

doi:10.21467/jmm.4.1.37-47

Authors

Amr Hamdy Ali Nuclear Materials Authority, Maadi-Kattameya, Cairo, Egypt
Ahmed Atef Eliwa Nuclear Materials Authority, Maadi-Kattameya, Cairo, Egypt
Mohammed Sobbhy Hagag Nuclear Materials Authority, Maadi-Kattameya, Cairo, Egypt

DOI:

https://doi.org/10.21467/jmm.4.1.37-47

Abstract

Upgrading crude yellow cake was done by 0.05 M Tris 2-ethylhexyl Phosphate / kerosene from 5 M nitrate solution. More than 98 % of uranium extracted after 5 stages of contact, shaking time 5 minutes and volume phase ratio 1/1. Uranium stripping efficiency reached 99 % using distilled H₂O, 10 minutes shaking time, (O/A) ratio 4/1 and three stripping stages. The purity of the produced cakes was enhanced by the addition of EDTA or CDTA. The produced cake using TEHP followed by EDTA addition to the stripping solution before uranium precipitation step was the most preferable cake with lower gangues.

Keywords:

Uranium, Solvent extraction, TEHP, Stripping, EDTA, CDTA

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