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

United States Patent

5,802,439
September 1, 1998
View the Complete Patent at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
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.
Bennett; Ralph G. (Idaho Falls, ID), Christian; Jerry D. (Idaho Falls, ID), Grover; S. Blaine (Idaho Falls, ID), Petti; David A. (Idaho Falls, ID), Terry; William K. (Idaho Falls, ID), Yoon; Woo Y. (Idaho Falls, ID)
Lockheed Martin Idaho Technologies Company (Idaho Falls, ID)
08/ 801,982
February 19, 1997
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to contract number DE-AC07-94ID13223 between the U.S. Department of Energy and Lockheed Martin Idaho Technologies Company.