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Title: 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 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 5802438
OSTI ID:
871813
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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method
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crystalline
99
moo
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isolation
99m
tc
compositions
therefrom
improved
producing
100
metal
irradiated
photons
particle
electron
accelerator
produce
dissolved
solvent
solvated
dried
generate
supply
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thereafter
heated
temperature
sublimate
form
gaseous
mixture
containing
vaporized
tco
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combined
oxidizing
gas
stream
cooled
sufficient
convert
condensed
tc-containing
purity
levels
resulting
reduced
conditions
ultrafine
starting
materials
segregated
therein
avoid
contaminants
tc compositions
temperature conditions
oxidizing gas
starting material
gaseous stream
mixture containing
improved method
gaseous mixture
temperature sufficient
stream containing
starting materials
reduced temperature
thereafter heated
fine crystalline
purity levels
containing vapor
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