Solubility Thermodynamics of CyMe-BTBP in Various Diluents Mixed with TBP
Artikel i vetenskaplig tidskrift, 2018

The two organic ligands 6,6'-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydrobenzo[1,2,4]triazin-3-yl)[2,2']bipyridine (CyMe-BTBP) and tri-butyl phosphate (TBP) have previously been investigated in different diluents for use within recycling of used nuclear fuel through solvent extraction. The thermodynamic parameters, , , and , of the CyMe-BTBP solubility in three diluents (cyclohexanone, octanol and phenyl trifluoromethyl sulfone) mixed with TBP have been studied at 288, 298 and 308 K, both as pristine solutions and pre-equilibrated with 4 molL nitric acid. In addition, the amount of acid in the organic phase and density change after pre-equilibration have been measured. The solubility of CyMe-BTBP increases with an increased temperature in all systems, especially after acid pre-equilibration. This increased CyMe-BTBP solubility after pre-equilibration could be explained by acid dissolution into the solvent. Comparing the and calculated using with the same parameters derived from a linear fit indicates temperature independence of all three thermodynamic systems. The change in enthalpy is positive in all solutions.

Used nuclear fuel

Solubility thermodynamics

CyMe4-BTBP solubility

Solvent extraction

GANEX process


Jenny Halleröd

Chalmers, Kemi och kemiteknik, Energi och material

Christian Ekberg

Chalmers, Kemi och kemiteknik, Energi och material

Ivan Kajan

Chalmers, Kemi och kemiteknik, Energi och material

Emma Aneheim

Chalmers, Kemi och kemiteknik, Energi och material

Journal of Solution Chemistry

0095-9782 (ISSN) 1572-8927 (eISSN)

Vol. 47 6 1021-1036

Safety of ACtinide Separation proceSSes (SACSESS)

Europeiska kommissionen (EU) (EC/FP7/323282), 2013-03-01 -- 2016-02-29.


Oorganisk kemi

Fysikalisk kemi

Analytisk kemi



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