Method for synthesizing glyoxylic acid by means of ozonizing maleic anhydride and mixed solvents

The invention relates to a method for synthesizing glyoxylic acid by means of ozonizing maleic anhydride and mixed solvents, and belongs to the field of technologies for preparing glyoxylic acid. The method for synthesizing the glyoxylic acid by means of ozonizing the maleic anhydride and the mixed solvents is low in cost. The method includes steps of carrying out hydrolysis, ozone oxidation, reduction, reduced-pressure distillation, crystallization and the like on the inexpensive maleic anhydride in the mixed solvents to ultimately obtain glyoxylic acid solid. The method has the advantages that the glyoxylic acid solid with high purity can be directly obtained by the aid of the method, and products are high in quality and wide in application; the method is easy to implement and high in glyoxylic acid yield, the maleic anhydride can be converted into the glyoxylic acid at a low price, the method can be used for industrial large-scale production, and certain contribution can be made for solving the problem of situation of excessive maleic anhydride; optimization of the traditional processes for producing the glyoxylic acid and elimination of backward processes can be stimulated, environment-friendly oxidizing agents are adopted, and accordingly huge contribution can be made for environmental protection.