The demonstration that a hydrotrope can effectively replace conventional aliphatic diluents represents a major breakthrough in hydrometallurgical process engineering. This substitution not only eliminates third-phase formation but also significantly reduces viscosity while increasing loading capacity and selectivity. These synergistic effects pave the way for more compact, stable, and economically viable processes. The post-doctoral project (24 months) aims to develop an innovative process for the selective extraction of uranium using the monoamides DEHiBA and MOEHA diluted in hydrotropes (PnP, DPnP, and TPnP). It seeks to compare the extraction and aggregation mechanisms in these media with those observed in conventional diluents. A thermodynamic approach will be used to identify the molecular interactions responsible for extraction efficiency and selectivity. A multiparametric study will assess the influence of organic-phase formulation and operating conditions on process performance. Distribution coefficients, extraction yields, separation factors, and loading capacities will be determined. Water and acid co-extraction, viscosity, and aggregate structure will also be investigated using appropriate characterization techniques. Potential losses of extractant and hydrotrope will be quantified to assess the reusability of the aqueous phases over successive extraction cycles. The project will then investigate the direct precipitation of uranium extracted into the organic phase through the stoichiometric addition of oxalic acid. This approach aims to eliminate the conventional aqueous back-extraction step, thereby reducing water consumption and hydrotrope losses. Finally, the nature, purity, and recovery yield of the resulting solids will be characterized to assess the feasibility of the process and its potential for sustainable implementation.