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

Författare

[Person 60e9cc97-0584-4797-874a-6ce1c9498028 not found]

Chalmers, Kemi och kemiteknik, Energi och material, Kärnkemi

[Person 9a25c463-1105-4fc0-bd55-fb3a33d55fee not found]

Chalmers, Kemi och kemiteknik, Energi och material, Kärnkemi

[Person 6dab6ebe-8d08-4687-a2d0-0fe430a37a02 not found]

Chalmers, Kemi och kemiteknik, Energi och material, Kärnkemi

[Person 6009617f-8e4d-4593-9bcb-3f39d32ab86f not found]

Chalmers, Kemi och kemiteknik, Energi och material, Kärnkemi

Journal of Solution Chemistry

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

Vol. 47 6 1021-1036

Safety of ACtinide Separation proceSSes (SACSESS)

Europeiska kommissionen (EU), 2013-03-01 -- 2016-02-29.

Ämneskategorier

Oorganisk kemi

Fysikalisk kemi

Analytisk kemi

DOI

10.1007/s10953-018-0774-4

Mer information

Senast uppdaterat

2018-09-19