Selective separation of uranium using modified Dowex 1X8 /TOA from carbonate leaching of Dolostone ore, Allouga area, Sinai

Leaching of uranium from a technological sample (680 mg/Kg U) in SW Sinai of Um Bogma Formation is carried out using a mix of sodium carbonte/sodium bicarbonate in presence of an oxidant (MnO2 or H2O2). The relevant factors e.g. (grain size=−200 mesh, alkali concentration= 100 g/l (3 : 1) mixed Na2CO3/NaHCO3, time=2 h, solid/liquid ratio=1/3, T=50 °C and H2O2=60 ml) of alkaline leaching of uranium have been optimized. This is followed by uranium recovery using an anion exchange resin, modified Dowex 1X8/TOA. Therefore, highly 92 % pure product of uranium has been obtained as sodium di‐urinate Na2U2O7.