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

Abstract

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.

Inventors:
 [1];  [1];  [1];  [1];  [1];  [1]
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  1. Idaho Falls, ID
Issue Date:
Research Org.:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
OSTI Identifier:
871814
Patent Number(s):
5802439
Assignee:
Lockheed Martin Idaho Technologies Company (Idaho Falls, ID)
Patent Classifications (CPCs):
G - PHYSICS G21 - NUCLEAR PHYSICS G21G - CONVERSION OF CHEMICAL ELEMENTS
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DOE Contract Number:  
AC07-94ID13223
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; production; 99m; tc; compositions; 99; mo-containing; materials; improved; producing; compounds; 100; metal; moo; irradiated; photons; particle; electron; accelerator; ultimately; produce; composition; heated; reaction; chamber; form; pool; molten; optimum; depth; 5-5; gaseous; mixture; thereafter; evolves; contains; vaporized; tco; combined; oxidizing; gas; generate; stream; containing; cooled; primary; condensation; stage; remove; cooling; undertaken; specially-controlled; rate; achieve; maximum; separation; efficiency; sequential; secondary; convert; condensed; tc-containing; product; collected; separation efficiency; tc compositions; controlled rate; oxidizing gas; gaseous stream; improved method; gaseous mixture; reaction chamber; reaction product; stream containing; containing material; ultimately produce; containing vapor; containing materials; /423/376/976/

Citation Formats

Bennett, Ralph G, Christian, Jerry D, Grover, S Blaine, Petti, David A, Terry, William K, and Yoon, Woo Y. Method for the production of .sup.99m Tc compositions from .sup.99 Mo-containing materials. United States: N. p., 1998. Web.
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Bennett, Ralph G, Christian, Jerry D, Grover, S Blaine, Petti, David A, Terry, William K, & Yoon, Woo Y. Method for the production of .sup.99m Tc compositions from .sup.99 Mo-containing materials. United States.
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Bennett, Ralph G, Christian, Jerry D, Grover, S Blaine, Petti, David A, Terry, William K, and Yoon, Woo Y. Thu . "Method for the production of .sup.99m Tc compositions from .sup.99 Mo-containing materials". United States. https://www.osti.gov/servlets/purl/871814.
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@article{osti_871814,
title = {Method for the production of .sup.99m Tc compositions from .sup.99 Mo-containing materials},
author = {Bennett, Ralph G and Christian, Jerry D and Grover, S Blaine and Petti, David A and Terry, William K and Yoon, Woo Y},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}
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Works referenced in this record:

Technetium-99m generators—The available options
journal, October 1982

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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