EPOXIDATION REACTIONS AND OPERATING CONDITIONS THEREOF

摘要

EPDXIDATION REACTIONS AND OPERATING CONDITIONS THEREOFAbstract5A method of producing an alkylene oxide includes passing a reaction mixture comprising alkylene, oxygen and a gaseous chlorine-containing promoter species over a supported catalyst containing silver and a promoting amount of rheniumto undergo an epoxidation reaction at a first operating condition. The method10 further includes subsequently performing the epoxidation reaction at a preferredoperating condition. The preferred operating condition is characterized by an efficiency of the epoxidation reaction toward the alkylene oxide where the efficiency is lower than that of a maximum efficiency achievable at an operating temperature corresponding to the preferred operating condition.15(Fig. I)