Research efforts in the extraction of actinides using new tetradentate ligands

Technical Report · Wed Jan 01 00:00:00 EST 1992

OSTI ID:6735852

Ensor, D D ^[1]

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1. Tennessee Technological Univ., Cookeville, TN (United States). Dept. of Chemistry

The synergistic extraction of two light actinides, thorium and uranium, with mixtures of 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one, HBNPP, 4-hexanoyl-3-methyl-1-phenyl-2-pyrazolin-5-one, P, and 4,4[prime]-nonanedioyl-bis(3-methyl-1-phenyl-2-pyrazolin-5-one), H[sub 2]NDBP with the tri-n-octyl phosphine oxide (TOPO) has been studied. The distribution of these ions between HN0[sub 3]/NaNO[sub 3] at an ionic strength of 1.0 M and the organic phase has been detected. Studies show, with the ligands alone, H[sub 2]NDBP is much more effective than either HBNPP or BHNPP. The slope-analysis treatments indicate formations ofTh(NDBP)[sub 2], Th(BNPP)[sub 4], and Th(EWP)[sub 4] for Th[sup +4], and U0[sub 2](NDBP), U0[sub 2](BMPP)[sub 2], and U0[sub 2](HMPP)[sub 2] for U0[sub 2][sup +2] in the organic phase. With the addition of TOPOas a neutral donor, Th[sup +4] shows a high extraction ability with the mixtures of chelate ligands and TOPO, and the order of the extraction power is H[sub 2]NDBP > HHNPP [approx] HBNPP within the range studied. Whereas, U0[sub 2][sup +2] shows significant increase in the extraction distribution and the extraction power follows the same order. Results show that in the TOPO systems, separation factors were much less than in the pyrazolone systems without TOPO.

• Research Organization: Los Alamos National Lab., NM (United States); Tennessee Technological Univ., Cookeville, TN (United States). Dept. of Chemistry
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6735852
• Report Number(s): LA-SUB-93-142; ON: DE93009787
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
THORIUM
SOLVENT EXTRACTION
URANIUM
LIGANDS
NITRIC ACID
ORGANIC NITROGEN COMPOUNDS
PROGRESS REPORT
SYNERGISM
TOPO
URANYL COMPOUNDS
ACTINIDE COMPOUNDS
ACTINIDES
DOCUMENT TYPES
ELEMENTS
EXTRACTION
HYDROGEN COMPOUNDS
INORGANIC ACIDS
METALS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHINE OXIDES
PHOSPHINES
PHOSPHORUS COMPOUNDS
SEPARATION PROCESSES
URANIUM COMPOUNDS
400105* - Separation Procedures
050800 - Nuclear Fuels- Spent Fuels Reprocessing