Octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide as an extractant for actinides from nitric acid waste

Conference · Sat Jan 01 00:00:00 EST 1983

OSTI ID:6165413

Horwitz, E P; Diamond, H; Kalina, D G; Kaplan, L; Mason, G W

The ability of neutral bifunctional organophosphorus compounds to extract trivalent actinides, specifically Am(III), from nitric acid solution has stimulated investigations into the processing of PUREX high level liquid waste. The authors' work in this area has focused primarily on derivatives of carbamoylmethylphosphine oxide (CMPO). The authors of this paper have found that the best extractant of this type is octyl(phenyl)-N,N-diisobutylmethylphosphine oxide (abbrev. O phi D (IB)CMPO). This extractant has a unique combination of substituent groups which impart to the resulting molecule substantially improved ability to extract actinides from acidic nitrate media and to withstand hydrolytic and radiolytic degradation. At the same time good selectivity of Am(III) actinides over fission products and favorable solubility properties on actinide loading are maintained. This paper describes the application of O phi D (IB) CMPO to the extraction of transuranium elements (Np, Pu, and Am) and fission product rare earths (F.P.R.E.) from evaporated highly acidic (5 M HNO/sub 3/) PUREX waste. Additional information on the influence of phenyl substitution in CMPO's and mixed CMPO-TBP extractant solutions on D/sub Am/ is also presented. 3 figures, 2 tables.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 6165413
• Report Number(s): CONF-830808-5; ON: DE83010774
• Resource Relation: Conference: International solvent extraction conference, Denver, CO, USA, 26 Aug 1983
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
AMERICIUM
SOLVENT EXTRACTION
HIGH-LEVEL RADIOACTIVE WASTES
NEPTUNIUM
ORGANIC PHOSPHORUS COMPOUNDS
SOLVENT PROPERTIES
PLUTONIUM
RARE EARTHS
EXPERIMENTAL DATA
FISSION PRODUCTS
FLOWSHEETS
MEDIUM TEMPERATURE
NITRIC ACID
PUREX PROCESS
ACTINIDES
DATA
DIAGRAMS
ELEMENTS
EXTRACTION
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
ISOTOPES
MATERIALS
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
REPROCESSING
SEPARATION PROCESSES
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM ELEMENTS
WASTES
400105* - Separation Procedures
052001 - Nuclear Fuels- Waste Processing