Thermodynamic studies of synergistic solvent extraction of Pa(V) by bis(2-ethyl hexyl) phosphoric acid mixed with some electron doner compounds

Journal Article · Sun Jan 01 04:00:00 EST 1984 · Solvent Extr. Ion Exch.; (United States)

DOI:https://doi.org/10.1080/07366298408918456· OSTI ID:6212798

El-Naggar, H A; Maghrawy, H B; Ramadan, A

Pa(V) was extracted from perchloric-perchlorate of 1M ionic strength solution at different temperatures. Thermodynamic parameters of PaO(OH (H(DEHP)/sub 2/)/sub 2/ formed in the organic phase were calculated and discussed. Some organophosphorus compounds: trioctyl phosphine oxide (TOPO); triphenylphosphine oxide (TPPO) and tributyl phosphate (TBP) were used as adducts mixed with HDEHP for Pa(V) extraction. The distribution ratio studies suggest the following species in the organic phase: PaO(OH) (H(DEHP)/sub 2/)/sub 2/. TOPO; PaO(OH (H(DEHP)/sub 2/)/sub 2/.TPPO and PaO(OH) (H(DEHP)/sub 2/)/sub 2/.2TTPPO; PaO(OH) (H(DEHP)/sub 2/)/sub 2/. 2TBP. The data obtained for ..delta.. H, ..delta.. G and ..delta.. S of the synergistic species were discussed and the reaction mechanisms were proposed. Antagonism was observed in the extraction by HDEHP-TBP at low concentrations of the TBP. 9 references, 4 figures, 4 tables.

• Research Organization: Atomic Energy Establishment, Cairo, Egypt
• OSTI ID: 6212798
• Journal Information: Solvent Extr. Ion Exch.; (United States), Journal Name: Solvent Extr. Ion Exch.; (United States) Vol. 2:3; ISSN SEIED
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ADDUCTS
BUTYL PHOSPHATES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
COMPLEXES
DATA
DATA ANALYSIS
DISTRIBUTION FUNCTIONS
ELEMENTS
ENERGY
ENTHALPY
ENTROPY
ESTERS
EXPERIMENTAL DATA
EXTRACTION
FREE ENERGY
FUNCTIONS
HDEHP
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
KINETICS
MEDIUM TEMPERATURE
METALS
NUMERICAL DATA
NUMERICAL SOLUTION
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PALLADIUM COMPLEXES
PALLADIUM COMPOUNDS
PALLADIUM HYDROXIDES
PALLADIUM OXIDES
PHOSPHORIC ACID ESTERS
PHYSICAL PROPERTIES
PLATINUM METALS
QUANTITY RATIO
REACTION KINETICS
SEPARATION PROCESSES
SOLVENT EXTRACTION
TBP
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TOPO
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS