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(2) Urea oxidation method
The urea oxidation method, also known as the Shestakov method, is currently the main method used in China
The process flow is shown in Figure 12-2
Figure 12-2 The process flow of producing hydrazine hydrate by urea oxidation method
Wu Dekun and others introduced chlorine gas in the dilute alkali, and then continuously added 42% sodium hydroxide and chlorine gas, which reacted to form sodium hypochlorite and sodium chloride, and separated and removed the mother liquor after sodium chloride centrifugation, which was 25%-27% sodium hypochlorite.
Li Benlin et al.
In recent years, China's production enterprises have continuously reformed this law with the aim of suppressing the occurrence of by-products and increasing the yield of hydrazine hydrate
Related links: Raschig method for preparing hydrazine hydrate