Polyoxometalates and process for immobilization of technetium based thereon
OwnerMichael T. Pope, Alexei Besserguenevinventors
Life of this patent
Estimating the term…
Abstract
Novel stable forms of technetium and methods for their production are provided. These methods have particular application for the removal of technetium from industrial waste compositions.
Claims25
A tricarbonyl metal derivative of a hexametalate anion or a salt thereof, wherein the derivative is of the formula [M6O19{M′(CO)3}n](8−n)−, wherein M is Nb or Ta, M′ is Mn or Re and n is 1, 2, 3 or 4.
A tricarbonyl metal derivative or a salt thereof, wherein the tricarbonyl derivative is selected from the group consisting of:
- [Re(CO)3Nb6O19]7−;
- [Re(CO)3Ta6O19]7−;
- [Mn(CO)3Ta6O19]7−;
- [Mn(CO)3Nb6O19]7−;trans-[{Mn(CO)3}2Nb6O 19]6−;
- cis-[{Mn(CO)3}2Nb6O19]6−;
- trans-[{Mn(CO)3}2Ta6O19]6−;
- cis-[{Mn(CO)3}2Ta6O19]6−;
- cis-[{Re(CO)3}2Nb6O19]6−;
- trans-[{Re(CO)3}2Nb6O19]6−;
- trans-[{Re(CO)3}2Ta6O19]6−;
- cis-[{Re(CO)3}2Ta6O19]6−.
A method for immobilizing technetium (Tc) which comprises binding Tc cations to a nucleophilic polyoxometalate anion, wherein Tc is stabilized by pi-acceptor through ion exchange of Re or Mn, initially present in the polyoxometalate anion.
A method for removing technetium from a composition comprising reacting a technetium containing composition which has been stabilized by attachment to a pi-acceptor ligand with a polyoxometalate anion to produce an insoluble technetium polyoxometalate product, and removing said insoluble technetium polyoxometalate product therefrom.
A method for immobilizing technetium (Tc) which comprises binding Tc cations, stabilized by pi-acceptor ligands, to highly nucleophilic polyoxometalate anions.
A storage stable technetium (Tc) containing complex which comprises a pi-acceptor ligand stabilized Tc cation attached to a nucleophilic polyoxometalate anion or polymer containing.
Dependencies are inferred from the claim text.