FIELD: chemical technology. SUBSTANCE: decomposition is carried out with 6-8 mole/l HCl at stoichiometric ratio followed by gel holding for 10-20 min. Gel is dried at 130-170 C for 60-90 min, and after leaching with water rare-earth elements were solubilized, and zirconium remained in sludge is leached with mineral acid. Leaching is carried out at the phase ratio solid: liquid (1:3)-(1:4) at the room temperature for 15-20 min. EFFECT: improved method of eudialyte concentrate processing. 2 cl
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