New ion exchangers and solvent extractants for pre-analysis separation of actinides. Annual report, June 1982-May 1983
Prior to radiochemical determination of actinide elements such as uranium, neptunium and plutonium, an ion exchange or solvent extraction method is often employed to separate these from themselves and other interfering elements. In order to improve the separation efficiency and reduce time, cost, and liquid waste of analytical separation methods, new and better ion exchangers and solvent extractants are under evaluation. New microreticular and macroreticular anion exchange resins and bifunctional organophosphorus solvent extractants have been evaluated for uranium, neptunium and plutonium separations. Previous work comparing numerous anion exchange resins has shown the macroreticular Amberlite IRA-938 resin as having the highest actinide capacity and best elution kinetics. Recent studies have confirmed the resin has advantages over others for Pu-U separations. Work at Rocky Flats on bifunctional organophosphorus solvent extractants for the recovery and purification of actinides has led to the identification of several new separation systems applicable for radiochemical analysis. Dihexyl-N,N-diethylcarbamoylmethylphosphonate (DHDECMP), its dibutyl analog DBDECMP, and DHDECMP-tributylphosphate (TBP) using liquid-liquid or extraction chromatography techniques are applicable for plutonium-americium and plutonium separations. Both DHDECMP and DBDECMP extract actinides strongly, extract lanthanides, iron, gallium, molybdenum, titanium, vanadium, zirconium partially, and do not extract most other elements from 5 to 7M nitric acid. With the DHDECMP-TBP and DBDECMP-TBP systems, synergistic effects have been observed for both plutonium and americium. The chemistry and application for pre-analysis separations of these solvent extraction systems are described. 11 references, 9 figures, 7 tables.
- Research Organization:
- Rockwell International Corp., Golden, CO (USA). Rocky Flats Plant
- DOE Contract Number:
- AC04-76DP03533
- OSTI ID:
- 6155790
- Report Number(s):
- RFP-3561; ON: DE85003982
- Resource Relation:
- Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AMERICIUM
SOLVENT EXTRACTION
NEPTUNIUM
ION EXCHANGE
PLUTONIUM
THORIUM
URANIUM
AMERICIUM COMPLEXES
DHDECMP
EXPERIMENTAL DATA
NEPTUNIUM COMPLEXES
PHOSPHONIC ACID ESTERS
PLUTONIUM COMPLEXES
TBP
URANIUM COMPLEXES
ACTINIDE COMPLEXES
ACTINIDES
BUTYL PHOSPHATES
COMPLEXES
DATA
ELEMENTS
ESTERS
EXTRACTION
INFORMATION
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
SEPARATION PROCESSES
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM COMPLEXES
TRANSURANIUM ELEMENTS
400105* - Separation Procedures
400103 - Radiometric & Radiochemical Procedures- (-1987)