| 摘要 |
1436185 Preparation of ethylene oxide D BRYCE-SMITH and E T BLUES 16 Jan 1974 [25 Jan 1973 19 Sept 1973] 3902/73 and 43995/73 Heading C2C [Also in Division Bl] Ethylene oxide is made by the oxidation of ethylene with an oxygen-containing gas in the presence of a supported silver catalyst made by depositing silver acetate on a carrier in the absence of an organic anhydride, decomposing the silver acetate at least partly to silver ketamide by heating in the presence of a non- reducing tertiary amine or amide and decomposing the silver ketenide to silver by continuing the heating. An example describes the oxidation using air as oxidant at atmospheric pressure, 205-232‹ C., a space velocity of 600 hr<SP>-1</SP> and a C 2 H 4 ; air ratio of 1 : 20 by volume. Ethylenedichloride may be added to increase the selectivity. |
