| 摘要 |
PURPOSE:To prepare a silver catalyst having high activity and also high in selectivity of ethylene to ethylene oxide, by immersing a carrier in a solution containing a silver salt, monoamine and ether substituted with an amino group and subsequently heating the impregnated carrier to support silver. CONSTITUTION:In preparing a silver catalyst used in gaseous phase catalytic oxidation of ethylene to ethylene oxide by molecular oxygen, a carrier (e.g., alpha-alumina) is immersed in a solution containing a silver salt (e.g., silver nitrate), monoamine (e.g., isopropylamine) and ether substituted by an amino group (e.g., morpholine) and, subsequently, the impregnated carrier is heated to support silver. The amount to be used of silver is 1-20wt% as a silver supporting amount and that of amine is 0.1-10mol to 1g atom of silver and that of ether substituted by an amino group is 0.3-3mol to 1g atom of silver. Thus obtained silver catalyst has high activity and is also high in selectivity of ethylene to ethylene oxide. |
