The rate of ethylene oxidation (at a constant feed composition and reaction temperature) and the selectivity to ethylene oxide (at a constant ethylene conversion) varied according to the sequence F ≫ U5 ≅ U4 ≅ U3 > U2 > U1. At the same temperature, U1 and U2 were not only the ...
This process involves direct oxidation of ethylene to ethylene oxide5 according to the following reaction Sign in to download full-size image The reaction uses metal catalysts (e.g., silver oxide) and the reaction temperature is approximately 250°C. (ii) Chlorine process The chlorine process is...
Among barium, lanthanum, cerium and bismuth, we find that barium-oxide-loaded catalysts achieve an ethylene-to-EO FE of 90%. When we pair this with the oxygen reduction reaction at the cathode, we achieve an energy input of 5.3 MJ per kg of EO, comparable to that of existing (...
In addition, decomposition of the active oxidation species in the presence of carbon monoxide has to be carefully controlled. Obviously, the formation of robust catalysts is critical for this oxidative reaction. The other major challenge of this process is how to achieve selective hydrogenation of ...
Ethylene oxide is currently produced by the direct oxidation of ethylene with oxygen or air over a catalyst. Ethylene is approximately 60% converted to the oxide at temperatures in the range of 100–150℃. In the past, an indirect but more general and more specific synthesis path consisted of...
reacting ethylene oxide and glycidyl phenyl ether in an emulsion polymerization reaction initiated with allyl alcohol, to produce ethylene oxide-phenyl glycidyl ether block copolymerdoi:US20080227917 A1in which R 1 is hydrogen or a C 1 -C 4 -alkyl radical, R 2 and R 4 are an alkyl or aryl...
employed, their purpose in accelerating the reaction between ethylene and oxygen, and how they enhance the selectivity, efficiency and yield of the final product. Discover more about the catalysts driving ethylene oxide (EO) production and their role in enabling the production of this vers...
an ethylene– chlorine mixture will explode spontaneously. The reaction is explosive at room temperature over the oxides of mercury or silver (Mellor 1946, Suppl. 1956). Ethylene reacts vigorously with oxidizing substances. It reacts with ozone to form ethylene ozonide, H2C(O3)CH2, which is un...
摘要: In the production of silver-based supported catalysts for the oxidation of ethylene to ethylene oxide, the gases evolved during heating to decompose the silver salts used to impregnate the support are recycled through the catalyst together with nitrogen and then nitrogen containing oxygen.收藏...
XIVThe reaction of ethylene oxide with oxazolidone-2 under various conditions is investigated. A method of preparing 3- β -hydroxyethyloxazolidone-2 from ethylene oxide and oxazolidone-2 under pressure in an autoclave, at 72–75° in aqueous medium, is described....