Wastewater treatment in hydrazine hydrate production

Abstract

As an important fine chemical raw material, hydrazine hydrate has a wide range of uses, not only for the synthesis of rocket fuel, foaming agent, herbicide, but also for the synthesis of medical drugs. Usually ketone, sodium hypochlorite, and ammonia are used as raw materials to synthesize hydrazine hydrate, but the wastewater during the production process contains a variety of organic matter, has peculiar smell, and contains 15-20% sodium chloride. Therefore, sewage treatment is relatively difficult. While processing sewage, if the sodium chloride in the sewage can be recycled, it not only effectively reduces the treatment cost of hydrazine hydrate production sewage, but also solves the environmental pollution caused by high salt content.

In this thesis, several methods to produce hydrazine hydrate are introduced, such as the Raschig method, the urea method, the ketazine method, and the hydrogen peroxide method. The basic process of these methods and some improvement measures about these methods will be introduced. In addition, some wastewater treatment methods in the production of hydrazine hydrate are also introduced, including evaporation and distillation, oxidation, and nanofiltration membrane methods.