The Discussion on Synthesis Process of Biurea by Hydrochloric Acid

By Series of comparative experiments, Factors of influencing the yield of biurea which is prepared from the condensation reaction between hydrazine hydrate and urea are studied, such as pH value, ratio of urea to hydrazine hydrate, temperature of reaction solution, reaction time and acid addition order. Under the optimum process conditions, the yield of biurea can reach over 97%, the biurea produced by hydrochloric acid method avoids large amounts of complex salt wastewater in condensation reaction of sulfuric acid method, and make the production process of biurea tends to be more environmentally friendly.