PROCESS FOR THE PRODUCTION OF ALKYLENE GLYCOL

摘要

The invention provides a process for the production of an alkylene glycol comprising converting an alkene to the corresponding alkylene oxide; absorbing the alkylene oxide in an aqueous absorbent and then stripping; supplying the aqueous alkyene oxide stream to a carboxylation reactor; converting the alkylene oxide to a corresponding alkylene carbonate; converting the alkylene carbonate to the alkylene glycol; removing water to form a dehydrated alkylene glycol stream; and purifying the dehydrated alkylene glycol stream, wherein the start-up procedure comprises supplying water, carboxylation-hydrolysis catalyst and carbon dioxide streams to the carboxylation reactor and providing a start-up stream comprising the alkylene glycol at an injection point at or downstream of the inlet used in supplying the stream to the carboxylation reactor and recovering an alkylene glycol stream from the glycol distillation column.