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Vapor-phase dehydration of several 1,2-alkanediols, such as 1,2-ethanediol, 1,2-propanediol, 1,2-butanediol and 1,2-pentanediol, to produce corresponding aldehydes was investigated over silica-supported WO3 catalyst, which was prepared by impregnation method and then calcined at 320°C. Higher than 90% yield of aldehydes could be achieved over WO3/SiO2 catalyst at 250°C with a feed of 20% aqueous 1,2-alkanediol...
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