1-Phenyl-3-methyl-4-benzoyl-pyrazolone-5. A promising extractant for plutonium

Journal Article · Sun May 01 04:00:00 EDT 1994 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399408005618· OSTI ID:7110767

Manchanda, V K; Mohapatra, P K ^[1]

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1. Bhabha Atomic Research Centre, Bombay (India)

Pyrazolones and isoxazolones have been found to be promising extractants for metal ions, particularly from strong acidic media and in the presence of complexing anions. Extraction constants (log k[sub ex]) in toluene medium at 25[degree]C for PuX[sub 4] species, where X = 1-phenyl-3-methyl-4-acetyl-pyrazolone-5 (HPMAP), 1-phenyl-3-methyl-4-benzoyl-pyrazolone-5 (HPMBP), or 1-phenyl-3-methyl-4-(3:5-dinitro-benzoyl)pyrazolone-5 (HPMDP), are determined as 11.35 [+-] 0.04, 12.89 [+-] 0.03, and 12.73 [+-] 0.02, respectively. These values are comparable to the corresponding value for 3-phenyl-4-benzoyl-5-isoxazolone (HPBI) and several order of magnitude larger than that for 2-thenoyltrifluoroacetone (HTTA). A systematic study is carried out to investigate the extraction behavior of these [beta]-diketones toward plutonium present in the analytical waste solution obtained during the determination of uranium in a (U, Pu) fuel sample by the Davies Gray method. Whereas 0.3 M HPMBP extracts > 85% of the plutonium present in a single step, maximum extraction observed with other reagents is [much lt] 0.1% HTTA, 0.3% HPMAP, and 2.5% HPBI. The extraction of plutonium increases with different diluents in the order n-dodecane < n-hexane < CHCl[sub 3] < CCl[sub 4] < toluene. Extracted plutonium is quantitatively stripped with either 10 M HNO[sub 3] or 1:1 HCl + 0.1 M hydroquinone. 19 refs., 5 figs., 8 tabs.

• OSTI ID: 7110767
• Journal Information: Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 29:8; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

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ACTINIDE COMPLEXES
ALKANES
ALKYLATED AROMATICS
AROMATICS
CARBON TETRACHLORIDE
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHLORINATED ALIPHATIC HYDROCARBONS
CHLORINE COMPOUNDS
CHLOROFORM
COMPILED DATA
COMPLEXES
DATA
DODECANE
ENERGY SOURCES
EXTRACTION
FUELS
HALOGEN COMPOUNDS
HALOGENATED ALIPHATIC HYDROCARBONS
HEXANE
HYDROCARBONS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
IONS
KETONES
LIGANDS
MATERIALS
MATHEMATICAL MODELS
NITRIC ACID
NUCLEAR FUELS
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PLUTONIUM COMPLEXES
PLUTONIUM IONS
REACTOR MATERIALS
SEPARATION PROCESSES
TOLUENE
TRANSURANIUM COMPLEXES