Catalytic oxidation with air of tartronic acid to mesoxalic acid on bismuth-promoted platinum
- 471 Downloads
Mesoxalic acid (ketomalonic acid) was prepared by oxidative dehydrogenation with air of tartronic acid in aqueous solution on carbon-supported platinum-bismuth catalysts. By increasing the pH, using a higher catalyst/substrate ratio or increasing the temperature, higher yields could be obtained (maximum yield obtained of 65% at 80% conversion). The results obtained for this reaction and for the analogous catalytic oxidations of glyceric acid to hydroxypyruvic acid, and lactic acid to pyruvic acid, enabled a general reaction mechanism to be proposed for the selective oxidation of α-hydroxy acids to α-keto acids on platinum-bismuth catalysts.
KeywordsOxalic Acid Catalytic Oxidation Pyruvic Acid Hydroxy Acid Oxidative Dehydrogenation
Unable to display preview. Download preview PDF.
- T. Imanaka, H. Terasaki, A. Fujio and Y. Yokota, Japanese Patent 05 331 100 (1993).Google Scholar
- H. Kimura, T. Imanaka and Y. Yokota, Japanese Patent 06 279 352 (1993).Google Scholar
- P. Fordham, R. Garcia, M. Besson and P. Gallezot, in: Studies in Surface Science and Catalysis, Vol. 101 (Elsevier, Amsterdam, 1996) p. 161.Google Scholar
- P. Fordham, M. Besson and P. Gallezot, in: Proc. 4th Int. Symp. on Heterogeneous Catalysis and Fine Chemicals, Studies in Surface Science and Catalysis (Elsevier, Amsterdam), accepted.Google Scholar
- S. Coffey, Rodd's Chemistry of Carbon Compounds, 2nd Ed., Vol. 1, Part E (Elsevier, Amsterdam, 1976).Google Scholar
- T. Mallat and A. Baiker, Catal. Today 19 (1994) 247.Google Scholar
- P. Gallezot, S. Chaumet, A. Perrard and P. Isnard, J. Catal., in press.Google Scholar