METHOD FOR PRODUCING CONJUGATED DIENE

摘要

A method for producing conjugated dienes by oxidative dehydrogenation of a C4 or greater monoolefin gas and oxygen gas using a molybdenum-containing metal oxide catalyst with heat removal by a coolant, which is characterized in that the amount of molybdenum adhering to the cold transfer surface in the reactor is kept at 20 mg/m2 or less or the surface roughness Ra of the cold transfer surface in the reactor is 3 µm or less, and the temperature difference between the reaction temperature and the coolant temperature is in the range of 5 - 220°C.