استخراج اورانیم و تولید کیک زرد از اسید فسفریک با استفاده از حلال‌های D2EHPA و TRPO

In this research, uranium extraction from a phosphoric acid solution produced from a new phosphate ore from a Syrian mine was carried out for the first time using D2EHPA-TRPO solvents in kerosene. The goal of the research was to produce yellowcake from the phosphoric acid solution. The process involved primary solvent extraction, primary stripping, secondary solvent extraction, scrubbing, and finally secondary stripping with precipitation. Based on the results obtained, the optimal values for primary solvent extraction factors were: O/A ratio of 1/3, temperature of 40°C, mixing time of 7 minutes, and TRPO concentration of 6% (v/v). The optimal values for primary stripping factors were: O/A ratio of 34/1 (two steps with O/A ratio of 17/1), temperature of 40°C, and mixing time of 40 minutes. The efficiency of these two processes was 86.40% and 95.60%, respectively. The optimal conditions for the secondary solvent extraction process included an O/A ratio of 1/4, temperature of 40°C, and mixing time of 7 minutes. For scrubbing the charged solvent with sulfuric acid (w/v), 2.5% of the optimal values of O/A ratio of 10/1, temperature of 40°C, and mixing time of 7 minutes were used. Finally, for secondary stripping and precipitation of yellowcake, a 2M solution of ammonium carbonate was used at a temperature of 40°C, and the stirring time was 15 minutes.