THE EXTRACTION BY N.N-DIALKYLAMIDES. II. EXTRACTION OF ACTINIDE CATIONS
作者： N. Condamines , C. Musikas
DOI: 10.1080/07366299208918093
关键词: Nitric acid 、 Stoichiometry 、 Extraction (chemistry) 、 Actinide 、 Thorium 、 Aqueous solution 、 Amide 、 Ligand 、 Chemistry 、 Inorganic chemistry
摘要: ABSTRACT N,N-dialkylamides are potential alternative extractants to tributyl-phosphate for the actinide separation in nuclear fuel reprocessing. Extraction mechanisms of U(VI), Th(IV) and Pu(IV) from nitric acid media investigated amide DOBA(((C4H9) (C2H5) CHCH2)2 NC(O) C3H7) DOiBA (((C4H9) CH(CH3)2). For low aqueous acidities, amides neutral extractants. stoichiometrics (Amide = DOBA or DOiBA), have been established. is supposed form a di- trisolvate inner-coordination sphere. concentrated solvents, bilogarithmic dependences distribution coefficients with ligand concentration point out non-integer slopes higher than those expected stoichiometry. Such features, very often noted amides, do not seem be due new chemical second-sphere species, which has never observed experimentally, but polyoriented interactions between free ligands complexes may considered as part non-ideality. Amides behave ...
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