FIELD: chemical technology.
SUBSTANCE: invention relates to removing impurities, such as aldehydes, from ethylene glycol aqueous solutions by treatment with bisulfite-treated strong-base anion-exchange resin. Invention describes a method for reducing the content of aldehydes in ethylene glycol aqueous solution containing about from 0.2 wt.-% to 20 wt.-% of ethylene glycol containing about from 80 wt.-% to 99.7 wt.-% of water and about from 100 mln-1 (mas.) to 0.1 wt.-% of aldehydes. Method involves contacting indicated solution with bisulfite-treated solid strong-base anion-exchange resin that before treatment with bisulfite comprises quaternary ammonium functional groups in hydroxide form. Invention provides the improvement in removing impurities, such as aldehydes, from flows of ethylene glycol aqueous solutions.
EFFECT: improved method for treatment.
2 cl, 1 ex
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