Solvent extraction of heptavalent technetium by tributyl phosphate

Conference · Wed Dec 31 23:00:00 EST 1980

DOI:https://doi.org/10.1080/01496398108057605· OSTI ID:6554590

Pruett, D J

The solvent extraction of heptavalent technetium from aqueous nitric or hydrochloric acid by tributyl phosphate in n-dodecane (TBP-NDD) has been studied over a wide range of TBP and acid concentrations at 25, 50, and 60/sup 0/C. The extraction was found to proceed according to the reaction 3 TBP + H/sup +/ + TcO/sub 4//sup -/ ..-->.. (HTCl/sub 4/ . 3TBP). A discussion of possible reaction mechanisms is presented, along with values for ..delta..G, ..delta..H, ..delta..S and the equilibrium constant for the extraction reaction. Finally, evidence for the coextraction of technetium by uranyl ions is presented.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6554590
• Report Number(s): CONF-810520-4
• Country of Publication: United States
• Language: English

Related Subjects

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11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
ACTINIDE COMPOUNDS
ACTINIDES
ALKANES
BUTYL PHOSPHATES
CHEMICAL REACTION KINETICS
DATA
DISTRIBUTION FUNCTIONS
DODECANE
ELEMENTS
ESTERS
EXPERIMENTAL DATA
EXTRACTION
FUNCTIONS
HYDROCARBONS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
KINETICS
MEDIUM TEMPERATURE
METALS
NITRATES
NITRIC ACID
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHORIC ACID ESTERS
REACTION KINETICS
REFRACTORY METALS
SEPARATION PROCESSES
SOLVENT EXTRACTION
TBP
TECHNETIUM
TRANSITION ELEMENTS
URANIUM
URANIUM COMPOUNDS
URANYL COMPOUNDS
URANYL NITRATES