Extraction of carbonate complexes of trivalent transplutonium elements with alkyl pyrocatechols

Journal Article · Wed Dec 31 23:00:00 EST 1986 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:7002446

Karalova, Z K; Bukina, T I; Myasoedov, B F; Fedorov, L A; Sokolovskii, S A

Extraction of trivalent americium curium, californium, and europium with a technical mixture of mono-and didecyl pyrocatechols (TAP) in different diluents from carbonate solutions is studied. The influence of various factors (pH, K/sub 2/CO/sub 3/, TAP and metal concentration, phase contact time) on the degree of extraction and separation of the elements is clarified. It is shown that the elements concerned are extracted quantitatively by TAP solution in toluene and cyclohexane in the K/sub 2/CO/sub 3/ concentration range 0.25-1.5 M. A difference is noted in the coefficients of americium and curium distribution when they are extracted with TAP from 0.25 M K/sub 2/CO/sub 3/ solution. The separation coefficients of this pair rise with the pH of the carbonate solution. The separation coefficients of this pair rise with the pH of the carbonate solution. The separation can be improved at the stage of reextraction of the elements with a mixture of K/sub 2/CO/sub 3/ and DTPA or EDTA from alkyl pyrocatechol because the americium and curium reextraction rate constants differ widely. The composition of the compounds in the organic phase based on 4-(..cap alpha..,..cap alpha..-dioctylethyl)pyrocatechol (DOP) is studied by /sup 13/C NMR spectroscopy.

• OSTI ID: 7002446
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 29:3; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400202 -- Isotope Effects
Isotope Exchange
& Isotope Separation
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACETIC ACID
ACTINIDE COMPLEXES
ACTINIDE COMPOUNDS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALKALI METAL COMPOUNDS
ALPHA DECAY RADIOISOTOPES
AMERICIUM 241
AMERICIUM COMPLEXES
AMERICIUM COMPOUNDS
AMERICIUM ISOTOPES
AROMATICS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CALIFORNIUM 249
CALIFORNIUM COMPLEXES
CALIFORNIUM COMPOUNDS
CALIFORNIUM ISOTOPES
CARBON 13
CARBON COMPOUNDS
CARBON ISOTOPES
CARBONATES
CARBOXYLIC ACIDS
CHEMICAL SHIFT
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CURIUM 243
CURIUM COMPLEXES
CURIUM COMPOUNDS
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DEUTERIUM COMPOUNDS
DEVELOPERS
ELECTRON CAPTURE RADIOISOTOPES
EUROPIUM 152
EUROPIUM 154
EUROPIUM COMPLEXES
EUROPIUM COMPOUNDS
EUROPIUM ISOTOPES
EUROPIUM NITRATES
EVEN-ODD NUCLEI
EXTRACTION
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOTOPE RATIO
ISOTOPE SEPARATION
ISOTOPES
LIGHT NUCLEI
MONOCARBOXYLIC ACIDS
NITRATES
NITROGEN COMPOUNDS
NMR SPECTRA
NUCLEI
ODD-EVEN NUCLEI
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ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PH VALUE
PHENOLS
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POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
PYROCATECHOL
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RADIOISOTOPES
RARE EARTH COMPLEXES
RARE EARTH COMPOUNDS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SPECTRA
STABLE ISOTOPES
TRANSPLUTONIUM COMPOUNDS
TRANSURANIUM COMPLEXES
TRANSURANIUM COMPOUNDS
YEARS LIVING RADIOISOTOPES