Synthesis of glyoxylic acid--By means of oxidation glyoxal with nitric acid

The synthesis of glyoxylic acid by means of oxidation glyoxal with nitric acid is studied. The optimum conditions of the reaction are obtained. The method for separating glyoxylic acid, oxalic acid and glyoxal is researched, which helps to provide the scientific basic for further synthesis of glyoxylic acid.