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Actinium radioisotope products of enhanced purity

United States Patent

7,736,610
June 15, 2010
View the Complete Patent at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
A product includes actinium-225 (.sup.225Ac) and less than about 1 microgram (.mu.g) of iron (Fe) per millicurie (mCi) of actinium-225. The product may have a radioisotopic purity of greater than about 99.99 atomic percent (at %) actinium-225 and daughter isotopes of actinium-225, and may be formed by a method that includes providing a radioisotope mixture solution comprising at least one of uranium-233 (.sup.233U) and thorium-229 (.sup.229Th), extracting the at least one of uranium-233 and thorium-229 into an organic phase, substantially continuously contacting the organic phase with an aqueous phase, substantially continuously extracting actinium-225 into the aqueous phase, and purifying the actinium-225 from the aqueous phase. In some embodiments, the product may include less than about 1 nanogram (ng) of iron per millicurie (mCi) of actinium-225, and may include less than about 1 microgram (.mu.g) each of magnesium (Mg), Chromium (Cr), and manganese (Mn) per millicurie (mCi) of actinium-225.
Meikrantz; David Herbert (Idaho Falls, ID), Todd; Terry Allen (Aberdeen, ID), Tranter; Troy Joseph (Idaho Falls, ID), Horwitz; E. Philip (Naperville, IL)
Battelle Energy Alliance, LLC (Idaho Falls, ID)
11/ 278,522
20060213329
April 3, 2006
GOVERNMENT RIGHTS This invention was made with government support under Contract No. DE-AC07-99ID13727 and Contract No. DE-AC07-05ID14517 awarded by the U.S. Department of Energy. The government has certain rights in the invention.