METHOD OF PREPARING NON-SUPPORTED RADIONUCLIDE ACTINIUM-225 Russian patent published in 2003 - IPC

FIELD: radioactive materials in medicine. SUBSTANCE: radionuclides thorium-229, thorium-228, and their daughter products are kept in nitric acid solution and solution with daughter products of thorium-229 is passed through cationite column, which is then washed with solution removing non-supported radionuclide actinium-225. Solution with radionuclides thorium-229, thorium-228, and their daughter products after being kept in acid solution and before passing through cationite column are passed through anionite column. Solution with daughter products of thorium-229 and thorium-228 are collected at the anionite column outlet. Chemical properties of the latter solution are controlled and solution is passed through cationite column, at the outlet of which solution with radionuclides actinium-225, radium-225, and radium-224 is collected. Column is washed with nitric acid solution and to give non-supported actinium-225 at the outlet. EFFECT: reduced process expenses. 5 cl, 1 dwg