Abstract
The oxidation of glyoxal and ethylene glycol in mediums like N NClO 4, N H 2SO 4 or M KNO 3 on a platinum anode led mainly to the formation of glyoxylic acid and to the breaking of the CC bond, giving then formic acid or fromaldehyde. The addition of metal salts (Ag, Sn, Pb, Tl) favours this latter reaction. The adsorption of glyoxal, which is an important step for its transformation into glyoxylic acid, is promoted by the lack of platinum oxides or hydroxides on the anode surface and is possible even at the oxidation potential of glyoxal.
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