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

Patent ·
OSTI ID:871814
 [1];  [1];  [1];  [1];  [1];  [1]
  1. Idaho Falls, ID
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An improved method 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.

Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
DOE Contract Number:
AC07-94ID13223
Assignee:
Lockheed Martin Idaho Technologies Company (Idaho Falls, ID)
Patent Number(s):
US 5802439
OSTI ID:
871814
Country of Publication:
United States
Language:
English

References (8)

Technetium-99m generators—The available options journal October 1982
Thermochromatographic Separation of 94mTc from Enriched Molybdenum Targets and its Large Scale Production for Nuclear Medical Application journal January 1994
Study of the purity of 99mTc sublimed from fission 99Mo and the radiation dose from the impurities journal January 1974
A review of 99mTc generator technology journal October 1982
99mTc Sublimation Generators journal January 1987
Radionuclide Generators book January 1992
Large-Scale Production and Distribution of Tc-99m Generators for Medical Use journal January 1987
Diffusion of Tc-99m in Neutron Irradiated Molybdenum Trioxide and Its Application to Separation journal June 1971

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