Abstract
The chemical transformation of the Tokem-308 cation exchanger (analogous to KU-2x8) in an HNO3 (steam)—air atmosphere obtained by evaporating 12 mol / l HNO3 is described. Gas-phase treatment of Tokem-308 resin samples in the above atmosphere at 403—443 K for 4—24 h leads to a change in some of their physical (mass, color, etc.) and chemical (solubility in H2O, NaOH, C2H5OH, acetone) properties. It has been found that 2,4-dinitrophenylacetic acid and para-nitrobenzoic acid are among the products of Tokem-308 resin transformation in the HNO3 (steam)—air atmosphere.
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