PREPARATION OF SILVER CATALYST

摘要

PURPOSE:To obtain a silver catalyst generating no flocculation and oxidizing ethylene with high capacity, by impregnating a porous refractory carrier with an amine-containing aqueous solution and heating the impregnated carrier at 150-250o for 1-30min to precipitate silver. CONSTITUTION:A porous refractory carrier is impregnated with an aqueous solution containing at least a silver salt and amine being a complex forming agent and the impregnated one is heated at 150-250o for 1-30min in the pres ence of air or inert gas to precipitate silver to obtain a silver catalyst for preparing ethylene oxide from ethylene. The aforementioned catalyst can contains not only sodium and cesium as cation components but also halogen except iodine as an anion component other than silver. A compound of an alkali metal and a compound of an alkaline earth metal can be supported by the carrier other than silver.