COATED CATALYST COMPRISING A MULTIMETAL OXIDE COMPRISING MOLYBDENUM

摘要

The invention relates to a shell catalyst comprising: (a) a support body, (b) a first layer containing a molybdenum oxide or a precursor compound forming molybdenum oxide, (c) a second layer containing a multi-metal oxide containing a molybdenum and at least one other metal. Preferably, the molybdenum oxide of the first layer is MoO3 and the multi-metal oxide of the second layer is a multi-metal oxide represented by general formula (Il): Mo12BiaCrbX1 cFedX2 eX3 fOy.