Method for the purification of radium from different sources

摘要

The present application is directed to a method for the purification of Radium, in particular 226 Ra, for target preparation for an essentially pure 225 Ac production from available radioactive sources, using an extraction chromatography in order to separate chemically similar elements such as Ba, Sr, and Pb from the desired Ra; wherein said extraction chromatography has an extractant system on the basis of a crown ether. The invention is further related to a method for recycling of 226 Ra, for target preparation for 225 Ac production from radium sources irradiated with accelerated protons (p,2n), after separation of the produced 225 Ac. In this method a combination of the above extraction chromatography and a cation exchange chromatography is used. The obtained 226 Ra is essentially free of the following chemical contaminants consisting of Ag, Al, As, Be, Bi, Ca, Cd, Co, Cr, Cu, Fe, Ga, K, Li, Mg, Mn, Na, Ni, Pb, Sr, V, Zn, and Ba.