Catalysis Letters

, Volume 46, Issue 3, pp 195–199

Catalytic oxidation with air of tartronic acid to mesoxalic acid on bismuth-promoted platinum

Authors

  • P. Fordham
  • M. Besson
  • P. Gallezot
Article

DOI: 10.1023/A:1019082905366

Cite this article as:
Fordham, P., Besson, M. & Gallezot, P. Catalysis Letters (1997) 46: 195. doi:10.1023/A:1019082905366

Abstract

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.

Copyright information

© Kluwer Academic Publishers 1997