FIELD: biochemistry.
SUBSTANCE: invention relates to a method for reducing the amount of impurities in an ethylene glycol solution obtained by oxidizing ethylene during preparation of ethylene oxide. Method includes passing an aqueous stream through a guard bed and one or more ion exchange treatment beds, wherein said guard bed and said aqueous stream contain from about 0.2 to 20 wt % ethylene glycol, and wherein said guard bed contains a cross-linked polystyrene resin, partially functionalised with quaternary ammonium functional groups, and said resin has a surface area greater than 400 m2/g. Invention also relates to a process for oxidation of ethylene.
EFFECT: proposed method makes it possible to protect ion exchange resins from damage by elution-resistant impurities.
18 cl, 2 ex, 1 tbl
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