Production of high specific activity silicon-32
A process for the preparation of silicon-32 is provided and includes contacting an irradiated potassium chloride target, including spallation products from a prior irradiation, with sufficient water, hydrochloric acid or potassium hydroxide to form a solution, filtering the solution, adjusting pH of the solution to from about 5.5 to about 7.5, admixing sufficient molybdate-reagent to the solution to adjust the pH of the solution to about 1.5 and to form a silicon-molybdate complex, contacting the solution including the silicon-molybdate complex with a dextran-based material, washing the dextran-based material to remove residual contaminants such as sodium-22, separating the silicon-molybdate complex from the dextran-based material as another solution, adding sufficient hydrochloric acid and hydrogen peroxide to the solution to prevent reformation of the silicon-molybdate complex and to yield an oxidization state of the molybdate adapted for subsequent separation by an anion exchange material, contacting the solution with an anion exchange material whereby the molybdate is retained by the anion exchange material and the silicon remains in solution, and optionally adding sufficient alkali metal hydroxide to adjust the pH of the solution to about 12 to 13. Additionally, a high specific activity silicon-32 product having a high purity is provided.
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- Patent Number(s):
- US 5346678; A
- Application Number:
- PPN: US 7-950552
- OSTI ID:
- 6986622
- Resource Relation:
- Patent File Date: 25 Sep 1992
- Country of Publication:
- United States
- Language:
- English
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High specific activity silicon-32
Production of high specific activity silicon-32
Related Subjects
SILICON
ION EXCHANGE
SILICON 32
ISOTOPE PRODUCTION
DISSOLUTION
FILTRATION
MOLYBDENUM COMPLEXES
PH VALUE
POTASSIUM CHLORIDES
SILICON COMPLEXES
ALKALI METAL COMPOUNDS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHLORIDES
CHLORINE COMPOUNDS
COMPLEXES
ELEMENTS
EVEN-EVEN NUCLEI
HALIDES
HALOGEN COMPOUNDS
ISOTOPES
LIGHT NUCLEI
NUCLEI
POTASSIUM COMPOUNDS
RADIOISOTOPES
SEMIMETALS
SEPARATION PROCESSES
SILICON ISOTOPES
TRANSITION ELEMENT COMPLEXES
YEARS LIVING RADIOISOTOPES
400703* - Radiochemistry & Nuclear Chemistry- Radioisotope Production