IRON/LITHIUM-PROMOTED CATALYSTS FOR THE PRODUCTION OF MALEIC ANHYDRIDE AND A PROCESS FOR THE PREPARATION THEREOF

摘要

43-21(6574)AIRON/LITHIUM - PROMOTED CATALYSTS FOR THEPRODUCTION OF MALEIC ANHYDRIDE AND APROCESS FOR THE PREPARATION THEREOFABSTRACT OF THE DISCLOSURECatalysts useful for the partial oxidationof nonaromatic hydrocarbons, particularly n-butane,with molecular oxygen or an oxygen-containing gas inthe vapor phase to produce maleic anhydride areprovided which comprise phosphorus, vanadium, andoxygen and a promoter component containing each ofiron and lithium. Such catalysts are prepared bycontacting a substantially tetravalent vanadium-containing compound and a phosphorus-containingcompound and a promoter component containing each ofiron and lithium in a substantially anhydrous alcoholmedium in the presence of anhydrous hydrogen chlorideto form an iron/lithium promoted phosphorus-vanadium-oxygen catalyst precursor. The catalyst precursor isrecovered, dried, roasted, formed into structures ifstructures are desired, and calcined.