Carbamoylmethylphosphoryl derivatives as actinide extractants: their significance in the processing and recovery of plutonium and other actinides

Journal Article · Sat Jan 01 00:00:00 EST 1983 · ACS Symp. Ser.; (United States)

DOI:https://doi.org/10.1021/bk-1983-0216.ch027· OSTI ID:5967278

Horwitz, E P; Diamond, H; Kalina, D G

Three classes of carbamoylmethylphosphoryl extractants were studied for their ability to extract selected tri-, tetra-, and hexavalent actinides from nitric acid. The three extractants are dihexyl-N,N-diethylcarbamoylmethylphosphonate (DHDECMP), hexyl hexyl-N,N-diethylcarbamoylmethylphosphinate (HHDECMP), and octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide OphiD(IB)CMPO. The above three extractants were compared on the basis of nitric acid and extractant dependencies for Am(III), solubility of complexes on loading with Nd(III) and U(VI), and selectivity of actinide(III) over fission products. The influence of temperature on D/sub Am/ from LiNO/sub 3/ (10/sup -2/ M HNO/sub 3/) and from 3 M HNO/sub 3/ using dilute solutions of DHDECMP, HHDECMP OphiD(IB)CMPO in o-xylene showed that the increase in D/sub Am/ in the series phosphone-phophinate-phosphine oxide was due primarily to an increase in the enthalpy of extraction. This information was used to develop conceptual flowsheets for the extraction of all of the actinides (U, Np, Pu, Am, and Cm) from high-level waste from PUREX processing using 0.4 M OphiD(IB)CMPO in DEB and for the extraction of all of the actinides from dissolved spent LWR fuel using 0.8 M DHDECMP in DEB. In both flowsheets, no oxidation state of Pu is necessary since the III, IV, and VI state extract into the organic phase. 15 references, 6 figures, 7 tables.

• Research Organization: Argonne National Lab., IL
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 5967278
• Journal Information: ACS Symp. Ser.; (United States), Vol. 216
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AMERICIUM
SOLVENT EXTRACTION
CURIUM
NEPTUNIUM
PLUTONIUM
URANIUM
EXPERIMENTAL DATA
FUEL REPROCESSING PLANTS
HIGH-LEVEL RADIOACTIVE WASTES
ORGANIC NITROGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
SPENT FUELS
WATER COOLED REACTORS
ACTINIDES
DATA
ELEMENTS
ENERGY SOURCES
EXTRACTION
FUELS
INFORMATION
MATERIALS
METALS
NUCLEAR FACILITIES
NUCLEAR FUELS
NUMERICAL DATA
ORGANIC COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
REACTOR MATERIALS
REACTORS
SEPARATION PROCESSES
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM ELEMENTS
WASTES
050800* - Nuclear Fuels- Spent Fuels Reprocessing
400201 - Chemical & Physicochemical Properties