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Method for generating a crystalline .sup.99 MoO.sub.3 product and the isolation .sup.99m Tc compositions therefrom

Patent ·
OSTI ID:871813
 [1];  [1];  [2];  [1]
  1. Idaho Falls, ID
  2. Blackfoot, ID
+ Show Author Affiliations
An improved method for producing .sup.99m Tc compositions. .sup.100 Mo metal is irradiated with photons in a particle (electron) accelerator to produce .sup.99 Mo metal which is dissolved in a solvent. A solvated .sup.99 Mo product is then dried to generate a supply of .sup.99 MoO.sub.3 crystals. The crystals are thereafter heated at a temperature which will sublimate the crystals and form a gaseous mixture containing vaporized .sup.99m TcO.sub.3 and vaporized .sup.99m TcO.sub.2 but will not cause the production of vaporized .sup.99 MoO.sub.3. The mixture is then combined with an oxidizing gas to generate a gaseous stream containing vaporized .sup.99m Tc.sub.2 O.sub.7. Next, the gaseous stream is cooled to a temperature sufficient to convert the vaporized .sup.99m Tc.sub.2 O.sub.7 into a condensed .sup.99m Tc-containing product. The product has high purity levels resulting from the use of reduced temperature conditions and ultrafine crystalline .sup.99 MoO.sub.3 starting materials with segregated .sup.99m Tc compositions therein which avoid the production of vaporized .sup.99 MoO.sub.3 contaminants.
Research Organization:
Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID
DOE Contract Number:
AC07-94ID13223
Assignee:
Lockheed Martin Idaho Technologies Company (Idaho Falls, ID)
Patent Number(s):
US 5802438
OSTI ID:
871813
Country of Publication:
United States
Language:
English

References (8)

Thermochromatographic Separation of 94mTc from Enriched Molybdenum Targets and its Large Scale Production for Nuclear Medical Application journal January 1994
Radionuclide Generators book January 1992
99mTc Sublimation Generators journal January 1987
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
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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100
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accelerator
avoid
combined
compositions
condensed
conditions
containing
containing vapor
contaminants
convert
cooled
crystalline
crystals
dissolved
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electron
fine crystalline
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improved
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irradiated
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method
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moo
oxidizing
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particle
photons
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reduced
reduced temperature
resulting
segregated
solvated
solvent
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starting material
starting materials
stream
stream containing
sublimate
sufficient
supply
tc
tc compositions
tc-containing
tco
temperature
temperature conditions
temperature sufficient
thereafter
thereafter heated
therefrom
therein
ultrafine
vaporized