Production of technetium from a molybdenum metal target

A technology of molybdenum metal and target material, which is applied in the field of preparing molybdenum metal target material, can solve the problems of inability to withstand high beam current, poor thermal conductivity of target material, limited production capacity, etc.

Inactive Publication Date: 2014-04-16
阿尔伯塔大学董事会
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  • Claims
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Problems solved by technology

Due to the use of MoO 3 Prepared targets have poor thermal conductivity and cannot withstand high beam currents, so production capacity is limited

Method used

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  • Production of technetium from a molybdenum metal target
  • Production of technetium from a molybdenum metal target
  • Production of technetium from a molybdenum metal target

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Embodiment Construction

[0021] Insubstantial modifications may be made to the embodiments described herein without departing from the scope covered by the claims. The word "comprising" in the claims is used in its inclusive sense and does not exclude the presence of other elements. The indefinite articles "a" and "an" preceding a claim feature do not exclude the presence of more than one of that feature. Each individual feature described herein can be used in one or more embodiments and is not to be construed as essential to all embodiments defined by the claims just because it is described herein. indispensable.

[0022] To prevent mass production 99m Required by Tc, expensive 100 Mo (or for 94m Tc's 94 Mo) targets are melted / volatilized under high-power radiation, and must be based on mass production 99m The high-power radiation-compatible metal thermal properties required by Tc use metallic Mo targets. Enriched 100 Mo powder must be formed or deposited as a solid structure to withstand hig...

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Abstract

Recycling of isotopically enriched molybdenum metal targets that are suitable for the large scale cyclotron production of 99mTc or 94mTc includes the charged particle irradiation of an enriched molybdenum metal target to produce a technetium isotope, separation of the technetium isotope following irradiation of the molybdenum, re-claiming the molybdenum metal and reformation of the molybdenum target for a further irradiation step. This process may then be repeated. Separation of the technetium isotope preferably is achieved by oxidative dissolution of the molybdenum thereby removing it from a target support plate, and forming molybdate and pertechnetate. The technetium isotope is isolated by various means, such as the ABEC process. To reuse the molybdenum, additional steps of isolating the molybdate and reducing it back to molybdenum metal are required. The recovered molybdenum metal may then be reformed as a target for example by pressing or pressing and sintering, followed by bonding to a target support plate.

Description

[0001] Cross References to Related Applications [0002] According to 35USC119(e), this application enjoys the rights and interests of the US provisional application whose filing date is April 10, 2011 and whose application serial number is No.61473795. Background technique [0003] 99m Tc is the most widely used isotope in nuclear medicine today. 99m Tc(t 1 / 2 =6h) are gamma-emitting radionuclides used in more than 80% of diagnostic nuclear medicine operations, the source of which has hitherto been reactor-generated 99 The decay of Mo. 99 Mo(t 1 / 2 =66h) adsorbed onto a smaller alumina column. Can be eluted daily from this "generator" 99m Tc, until 99 Mo decays to the point where further economical extraction is not possible within typically about 1-2 weeks. [0004] 94m Tc is a positron-emitting isotope that has been used in various clinical studies over the past two decades, 99m Tc and 94m Enriched molybdenum oxide is used in the cyclotron generation of Tc. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21G1/00H05H6/00
CPCG21G1/001H05H6/00G21G2001/0042G21G1/10G21G1/00
Inventor 约翰·威尔逊凯瑟琳·加格农斯蒂芬·麦奎里
Owner 阿尔伯塔大学董事会
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