Abstract
The catalytic performance of SnO 2-WO 3 oxides for the dimerization of formaldehyde to methyl formate (Tischenko reaction) was investigated. The Sn/W (atomic ratio) = 67/33 catalyst showed the highest activity amongst a series of catalysts different in Sn/W ratio. The acidity and basicity data proved that the possession of both acidic and basic properties are required to promote the reaction. The Sn/W = 67/33 catalyst showed a high activity just as the Sn/Mo = 70/30 catalyst and, a much better selectivity to methyl formate. The activity of the Sn/W = 67/33 was found to be very stable, even in the absence of oxygen whose participation in the reaction is not desirable.
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