CATALYST FOR GLYOXAL SYNTHESIS AND METHOD OF GLYOXAL SYNTHESIS

摘要

FIELD: chemistry.;SUBSTANCE: catalyst for glyoxal synthesis includes silicon-containing silver carrier and silver as active component, as silicon-containing carrier silicate with open pores is used. Ion-conducting modifier, in amount 0.5÷50.0% of catalyst weight, is introduced into silicate pores, silver with particle size 1÷200 nm in amount 1.0÷10.0% of catalyst weight is placed in pore mouths on outer surface of carrier. Also described is method of glyoxal synthesis, including oxidation of ethylene glycol with oxygen, which is in mixture of air with inert gas and water vapours, on silver catalyst at temperature from 450 to 800°C, ethylene glycol oxidation being carried out with reaction mixture, in which molar ratio of oxygen to ethylene glycol is set in interval from 0.7:1.0 to 2.0:1.0, using described above catalyst.;EFFECT: increase of selectivity of ethylene glycol oxidation process, increase of catalyst service term, increase of its heat resistance and reduction of silver consumption for catalyst preparation.;2 cl, 2 tbl, 4 dwg, 10 ex