Method of separating short half-life radionuclides from a mixtur

Details Method of separating short half-life radionuclides from a mixtur Method of separating short half-life radionuclides from a mixtur

1998-01-13

1999-03-23

Mai, Ngoclan

Liquid purification or separation

Processes

Ion exchange or selective sorption

423 6, 423251, 423253, 376189, C02F 142

Patent

active

058854657

ABSTRACT:
The present invention is a method of removing an impurity of plutonium, lead or a combination thereof from a mixture of radionuclides that contains the impurity and at least one parent radionuclide. The method has the steps of (a) insuring that the mixture is a hydrochloric acid mixture; (b) oxidizing the acidic mixture and specifically oxidizing the impurity to its highest oxidation state; and (c) passing the oxidized mixture through a chloride form anion exchange column whereupon the oxidized impurity absorbs to the chloride form anion exchange column and the 22.sup.9 Th or 2.sup.27 Ac "cow" radionuclide passes through the chloride form anion exchange column. The plutonium is removed for the purpose of obtaining other alpha emitting radionuclides in a highly purified form suitable for medical therapy. In addition to plutonium; lead, iron, cobalt, copper, uranium, and other metallic cations that form chloride anionic complexes that may be present in the mixture; are removed from the mixture on the chloride form anion exchange column.

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W.F. Davidson, et al, The Gamma-Ray Spectrum of 227Th, Nuclear Physics, pp. 342-362, 1968.

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