METHOD OF PRODUCING Ac SOLUTION Russian patent published in 2025 - IPC B01D15/08 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing ²²⁵Ac solution. Method includes the following stages (I)-(III): step (I) of passing solution (1) containing ²²⁶Ra and ²²⁵Ac, through a solid-phase extractant (a) containing a compound of formula (A) to make the solid-phase extractant (a) retain ²²⁵Ac; step (II) of passing a liquid containing eluate (2) obtained by elution of remaining 225Ac from the solid-phase extractant (a), through a solid-phase extractant (b), which contains a compound of formula (B), to make the solid-phase extractant (b) retain ²²⁵Ac; and step (III) of elution of retained ²²⁵Ac from solid-phase extractant (b) to obtain 225Ac solution.

Each of m and n independently represents 0 or 1, and each of R¹ – R⁴ independently represents a linear or branched C8-C12 alkyl group.

Each of R⁵ and R⁶ independently represents a C8 alkyl group or a C8 alkoxy group.

EFFECT: high purity of obtained 225Ac solution while reducing the amount of solvent used for separating ²²⁶Ra and ²²⁵Ac.

14 cl