FIELD: organic chemistry, chemical technology.
SUBSTANCE: invention relates to a method for vapor-phase oxidation of ethylene to ethylene oxide. Method involves interaction of ethylene and oxygen in the presence of silver-base highly selective catalyst. On the onset stage of process fresh catalyst is used and on the additional stage of process when cumulative productivity enhances 0.01 kT of ethylene oxide per m3 of catalyst by ethylene oxide the concentration of ethylene is increased in the reaction mixture. Also, invention relates to a method for using ethylene oxide for preparing 1,2-ethanediol or corresponding 1,2-ethanediol ether involving conversion of ethylene oxide to 1,2-ethanediol or 1,2-ethanediol ether wherein ethylene oxide has been prepared by this method for producing ethylene oxide.
EFFECT: enhanced selectivity, enhanced activity of catalyst.
12 cl, 4 dwg, 1 tbl
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