Flynn, Thiel, Boutell & Tanis
Preparation process of ethylene oxide
 Ethylene is oxidized into ethylene oxide by bringing a feed gas mixture, which contains the ethylene, oxygen and at least 1 vol. % of carbon dioxide as well as at least 0.5 vol. ppm of a chlorine-containing burning reaction decelerator and at least 1 vol. ppm as calculated in terms of nitrogen monoxide of a nitrogen oxide and/or a precursor thereof, into contact with a catalyst which carries silver and as a practically sole alkali metal, rubidium at an Rb/Ag atomic ratio of 2/1000-7/1000 on a fire-resistant carrier having a specific surface area of 1 m.sup.2 /g or smaller. 
Mitsui Toatsu Chemicals, Incorporated
Y B C
Y02P B01J C07D
additional inventional inventional
Kenji Mutsuo Hiroshi Tadashi Hisaharu
Yoshida Nakajima Kimura Komiyama Kuboyama