Abstract
Oxidation of ethyl lactate to pyruvate was carried out in the liquid-phase at 130°C in the presence of the oxides of various group IV to VI elements as candidate catalysts. Optimized reaction conditions with TiO 2 as a probe catalyst followed by comparative reaction studies for catalyst screening showed TiO 2, ZrO 2, and SnO 2 (+SnO) to be highly selective catalysts for giving pyruvate. Effects of temperature, oxygen pressure, solvents, and catalyst requirements are described. XPS and XRD patterns are given for a binary oxide, SnO 2-MoO 3, which showed excellent activity in favor of pyruvate.
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