CONCENTRATION AND FINAL PURIFICATION OF NEPTUNIUM BY ANION EXCHANGE
It was demonstrated that neptunium(IV) can be readily absorbed onto anion exchange resins from 6 M HNOsub 3/ containing ferrous sulfamate and hydrazine or semicarbazide, separated from plutonium, uranium, and common metallic impurities by washing the resin at 25 deg C with 6 M HNO/sub 3/ containing ferrous sulfamate and hydrazine or semicarbazide, separated from fission products and thorium by washing the resin at 60 deg C with S M HNO/sub 3/- 0.01 M HF containing hydrazine or semicarbazide, and eluted at concentrations greater than 40 g Np/l with 0.35 M HNO/sub 3/ at 25 deg C. Decontamination factors of greater than 10,000 from uranium, plutonium, and common metallic contammants, greater than 25,000 for fission products normally expected in the feed (mainly Zr-Nb with some Ru-Rh), and greater than 1000 for thoriuin are obtainable under proper operating conditions. Because of the low processing rates, the necessity for carrying out the absorption cycle at 25 deg C and the absence of radiation daraage problems, Dowex 1, X-4 (50-100 mesh) or Dowex 21K (50-100 mesh) resins are considered the best choices for this application. Gassing occurs with the use of ferrous sulfamate - semicarbazide reductant but is not a serious problem and does not occur with ferrous sulfamate -hydrazine reductant in 6 M HNO/sub 3/. (auth)
- Research Organization:
- General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
- DOE Contract Number:
- AT(45-1)-1350
- NSA Number:
- NSA-14-005251
- OSTI ID:
- 4189627
- Report Number(s):
- HW-59193(Rev.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANIONS
CHEMISTRY
DECOMPOSITION
DECONTAMINATION
FISSION PRODUCTS
HYDRAZINE
HYDROFLUORIC ACID
IMPURITIES
ION EXCHANGE
IRON COMPOUNDS
NEPTUNIUM
NIOBIUM
NITRIC ACID
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PLUTONIUM
RADIATION EFFECTS
RESINS
RHODIUM
RUTHENIUM
SEMICARBAZIDES
SEPARATION PROCESSES
SULFAMIC ACID
SULFONIC ACIDS
THORIUM
URANIUM
ZIRCONIUM