Reaction of low temperature oxidations of ethylene glycol (EG) by molecular oxygen in the presence of salts of bivalent copper and alkali both in water and in waterless solutions was investigated. It was found that at low (close to room) temperatures and the process carrying out in waterless solutions the basic product of EG oxidation is formic acid. Rise the temperature from 20 – 40 о С to 80 – 90 о С or carrying out the reaction in the water-containing solutions leads to sharp change of a direction of reaction. EG in these conditions is oxidized with primary formation of glycolic acids salts. Change of a direction of reaction is connected, apparently, with decrease stability of chelate complexes of Cu 2 + -ions with dianionic form of EG.
окисление кислородом, этиленгликоль, катализ Cu 2 +-ионами, образования муравьиной и гликолевой кислот, oxidation by oxygen, ethylene glycol, Cu 2 + -ions catalysis, formic and glycolic acids formations
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