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Title: Method for the production of {sup 99m}Tc compositions from {sup 99}Mo-containing materials

An improved method is described for producing {sup 99m}Tc compositions from {sup 99}Mo compounds. {sup 100}Mo metal or {sup 100}MoO{sub 3} is irradiated with photons in a particle (electron) accelerator to ultimately produce {sup 99}MoO{sub 3}. This composition is then heated in a reaction chamber to form a pool of molten {sup 99}MoO{sub 3} with an optimum depth of 0.5--5 mm. A gaseous mixture thereafter evolves from the molten {sup 99}MoO{sub 3} which contains vaporized {sup 99}MoO{sub 3}, vaporized {sup 99m}TcO{sub 3}, and vaporized {sup 99m}TcO{sub 2}. This mixture is then combined with an oxidizing gas (O{sub 2(g)}) to generate a gaseous stream containing vaporized {sup 99m}Tc{sub 2}O{sub 7} and vaporized {sup 99}MoO{sub 3}. Next, the gaseous stream is cooled in a primary condensation stage in the reaction chamber to remove vaporized {sup 99}MoO{sub 3}. Cooling is undertaken at a specially-controlled rate to achieve maximum separation efficiency. The gaseous stream is then cooled in a sequential secondary condensation stage to convert vaporized {sup 99m}Tc{sub 2}O{sub 7} into a condensed {sup 99m}Tc-containing reaction product which is collected. 1 fig.
Authors:
; ; ; ; ;
Publication Date:
OSTI Identifier:
672651
Report Number(s):
US 5,802,439/A/
PAN: US patent application 8-801,982; TRN: 99:001113
DOE Contract Number:
AC07-94ID13223
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 1 Sep 1998
Research Org:
Lockheed Martin Idaho Tech Co
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; TECHNETIUM 99; MOLYBDENUM 99; ISOTOPE PRODUCTION; MOLYBDENUM 100; MOLYBDENUM OXIDES; MOLTEN SALTS; DEVOLATILIZATION; TECHNETIUM OXIDES; OXIDATION; VAPOR CONDENSATION