Combination of best promoter and micellar catalyst for more than kilo-fold rate acceleration in favor of chromic acid oxidation of d-galactose to d-galactonic acid in aqueous media at room temperature

Abstract

Picolinic acid, 2,2′-bipyridine and 1,10-phenanthroline promoted Cr(VI) oxidation of d-galactose to d-galactonic acid in three representative aqueous micellar media has been studied. The anionic surfactant (SDS) accelerated the rate of reaction while the cationic surfactant (CPC) and neutral surfactant (TX-100) retarded the reaction rate. Combination of bipy and SDS is the best choice for chromic acid oxidation of d-galactose to d-galactonic acid in aqueous media although 1,10-phenanthroline is best promoter in absence of micellar catalyst.