Elaheh Bohloulbandi - ACECR - Applied Chemistry Research Group, Faculty of Chemistry, Tehran University, P.O. Box ۱۸۶-۱۳۱۴۵ Tehran, Iran
Parviz Ahmadi Aval - ACECR - Applied Chemistry Research Group, Faculty of Chemistry, Tehran University, P.O. Box ۱۸۶-۱۳۱۴۵ Tehran, Iran

This study relates to an improved method for the preparation of azodicarbonamide, which is useful as a chemical blowing agent. Azodicarbonamide is prepared from the oxidation reaction of hydrazodicarbonamide (biurea) with hydrogen peroxide as a green oxidant in the presence of a potassium bromine as a catalyst. Biurea also is prepared by reaction of urea and hydrazine. The prepared products have been characterized by FTIR and TGA/DSC. By Series of comparative experiments, Factors of influencing the yield of azodicarbonamide are studied, such as the amount of oxidant and temperature of reaction solution. Under the optimum process conditions, the yield of azodicarbonamide can reach over ۹۵%, with hydrogen peroxide oxidation process.

azodicarbonamide, Hydrazodicarbonamide, Green Oxidation, Hydrogen peroxide oxidation