System and method for producing molybdenum 99

Patent metadata

Field	Value
Publication number	US-12195825-B2
Application number	US-202016916278-A
Country	US
Kind code	B2
Filing date	Jun 30, 2020
Priority date	Jun 30, 2020
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

The invention provides an automated method for isolating a targeted isotope, the method having the steps of supplying a dissolved uranium targets into a first reaction environment; precipitating non-targeted isotope within the first reaction environment transferring liquid phase targeted isotope to a second reaction environment; precipitating the liquid phase targeted isotope in the second reaction environment; dissolving the precipitated targeted isotope; transferring the dissolved targeted isotope to a third reaction environment; and precipitating non-targeted isotope (i.e., iodine), such that the targeted isotope remains in the solution. Also provided is an automated system for isolating isotopes, the system having a plurality of reaction environments adapted to pneumatically receive and disgorge reactants and products via remotely actuated valves positioned between each of the reaction environments.

First claim

The embodiment of the invention in which an exclusive property or privilege is claimed is defined as follows:

1. An automated method for isolating a targeted isotope, the method comprising:
a) placing a liquor containing isotope source material into a closed loop pneumatic system;
b) contacting the source material to positive and negative pressures to transport the source material to a first environment for precipitating out non-targeted isotopes;
c) transporting remaining liquid containing targeted isotope to a second environment containing nitric acid for precipitating the targeted isotope;
d) transporting the precipitated targeted isotope to a third environment for re-liquifying the precipitated targeted isotope;
e) transporting the liquefied targeted isotope to a series of filters and sorbents to remove iodine, organics and other impurities from the liquefied targeted isotope; and
f) transporting the filtered liquefied targeted isotope to a final product container wherein the automated method occurs within 120 minutes without physical movement of reaction vessels or bottles.

2. The method as recited in claim 1 wherein the positive and negative pressures are applied when predetermined reaction parameters are established during each of the steps.

3. The method as recited in claim 2 wherein the reaction parameters are data points selected from the group consisting of reaction time, product temperature, reaction vessel temperature, precipitate opacity, reaction vessel pressure, reaction vessel product mass, reaction time, pH changes and combinations thereof.

4. The method as recited in claim 1 wherein the step of precipitating the targeted isotope comprises complexing the targeted isotope with aldoximes and ketoximes compounds selected from the group consisting of α-benzoin oxime, anti-diphenylglyoxime, 1,2-cyclohexanedione dioxime, dimethylglyoxime, (E)-benzaldehyde oxime, other di-oximes, and combinations thereof.

5. The method as recited in claim 1 wherein the precipitated targeted isotope is separated from liquid phase containing nontargeted isotopes.

6. The method as recited in claim 1 wherein fluid access to the environments is controlled via remotely actuated valves.

7. The method as recited in claim 6 wherein the valves are actuated based on reaction times within the environments.

8. The method as recited in claim 1 wherein fluid access to the first environment is prevented when the third environment is accessed.

9. The method as recited in claim 8 wherein valves controlling access to the first environment are closed when valves controlling access to the second and third environments are open.

10. The method as recited in claim 5 wherein the targeted precipitated isotope is liquefied with alkaline solution comprising between 0.2 M and 0.4 M NaOH.

11. The method as recited in claim 1 wherein the precipitated targeted isotope is filtered with acidic solution to create retentate comprising fission fragments, unused complexing compound, Rh and Ru carrier, KMnO 4 , and acid washes.

Assignees

• Uchicago Argonne Llc

Inventors

• Rotsch David A
• Brossard Thomas W
• Kmak Ronald T
• Tkac Peter

Classifications

• C01G39/003

  Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange · CPC title

• C22B34/34

  Obtaining molybdenum {(treatment or purification of solutions by adsorption on solids C22B3/24, by liquid-liquid extraction C22B3/26, by ion-exchange extraction C22B3/42; preparation of molybdenum involving liquid-liquid extraction, adsorption or ion-exchange C01G39/003)} · CPC title

• G21G2001/0036

  Molybdenum · CPC title

• G21G1/001 Primary

  Recovery of specific isotopes from irradiated targets · CPC title

• G21G1/0005

  Isotope delivery systems (use of radioisotopes as tracers G21H5/02) · CPC title