Abstract <p>The possibility of the ¹³⁷Cs recovery by sorption onto ferrocyanide sorbents using a crossflow membrane filtration installation was examined. The steps of the sorption, washing, desorption, and sorbent regeneration were developed. This approach allows using the unsupported sorption material (nongranulated sorbent). Under comparable conditions, the sorption onto the nongranulated sorbent using a crossflow filtration installation occurs more efficiently than in the classical process of the column sorption onto the granulated sorbent. Namely, the process kinetics is better, the capacity is higher, and the effective filtration cycle is potentially higher. The contamination of the target cesium concentrate with products of the sorption material degradation is excluded.</p>