Fe-Mo catalyst for methanol oxidation to formaldehyde is prepared through a coprecipitation method.XRD,TEM,ICP and other characterization methods are utilized to explore the impacts of dropping method,molar ratio of each metal component,and pH during precipitation process,calcination temperature and catalyst molding method on the activity of the catalyst.Results show that the yield of formaldehyde can exceed 96％when pH is controlled at 2.5 in co-flow dropping,the optimal ratio of iron to molybdenum is 1︰3.4,catalyst calcination temperature is at 450℃ and Raschig ring is used for catalyst shaping.The preferred catalyst shows stable activity and no significant attenuation in the life evaluation experiment lasting for 800 hours,which has potential industrial production value.
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