FIELD: nuclear power engineering. SUBSTANCE: sorbent has following structural formula: 
where R is styrene, acrylic acid ester, or vinyl acetate; X is 
. Sorbent is prepared by common condensation of maleic anhydride copolymer, bifunctional organic compound (hydroquinone, diethylene glycol, hexamethylenediamine, glycerol, etc.), and benzoin oxime in molar ratios 1:(0.25-5):(0.75- 0.5) at heating in polar solvent. EFFECT: improved selectivity and heat and radiation resistance. 4 cl, 1 dwg, 4 tbl
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