About us
Espace utilisateur
INSTN offers more than 40 diplomas from operator level to post-graduate degree level. 30% of our students are international students.
Professionnal development
Professionnal development
Find a training course
INSTN delivers off-the-self or tailor-made training courses to support the operational excellence of your talents.
Human capital solutions
At INSTN, we are committed to providing our partners with the best human capital solutions to develop and deliver safe & sustainable projects.
Home   /   Thesis   /   New cyclic extractant molecules for uranium/plutonium separation

New cyclic extractant molecules for uranium/plutonium separation

Analytic chemistry Chemistry Condensed matter physics, chemistry & nanosciences


This thesis subject is dedicated to the optimization of the uranium/plutonium separation process (PUREX) for spent nuclear fuels reprocessing. New extractant molecules will be studied for targeted elements separation by liquid-liquid extraction from nitric acid medium. They should be soluble in industrial aliphatic diluents, adaptable to extraction technologies actually used in terms of density, viscosity, solubility and extraction kinetics. In order to help in the target molecules selection, theoretical DFT calculations (Density Functional Theory) will be investigated to make a comparative estimate of their affinity towards U and Pu elements. Then the student will have to determine the feasibility of organic synthesis and to optimize synthesis pathways. Once the molecules will be purified and their structures and purity characterized, their separation performances will be assessed by liquid-liquid batch extraction tests involving radioelements. Finally, the structures of metallic complexes formed in organic phases with those new extractant molecules will be studied to better understand extraction mechanisms.


Département de recherche sur les procédés pour la mine et le recyclage du combustible
Service d’études des Procédés de Traitement et de recyclage des combustibles
Laboratoire de Conception et d’Intégration des procédés de Séparation
Top envelopegraduation-hatlicensebookuserusersmap-markercalendar-fullbubblecrossmenuarrow-down