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Preparation of Hydrazine Hydrate by Raschig Method
Time of Update: 2021-12-30
032 (density ratio of hydrazine hydrate at 21°C to water at 4°C), melting point -51.
Figure 12-1 Raschig process production process of hydrazine hydrateChloramine is formed during the reaction process, so it is also called the chloramine method .
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Preparation of Hydrazine Hydrate by Hydrogen Peroxide Method
Time of Update: 2021-12-30
In the reaction process, the hydrogen peroxide used for the reaction can be used in an aqueous solution with a mass fraction of 70%; ammonia can be used in gaseous ammonia and liquid ammonia; methyl ethyl ketone can be used in industrial products during the reaction, and it can be recycled afterwards.
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Preparation of Hydrazine Hydrate by Urea Oxidation Method
Time of Update: 2021-12-30
Figure 12-2 The process flow of producing hydrazine hydrate by urea oxidation methodWu 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.
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Preparation of hydrazine hydrate by ketazine method
Time of Update: 2021-12-30
The Bayer process involves the reaction of acetone , oxidant chlorine or sodium hypochlorite with ammonia to produce the intermediate ketazine .
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Preparation method and application of hydrazine hydrate
Time of Update: 2021-12-06
Reaction equation:NH 2 CONH 2 +NaOCl+2NaOH→H 2 N-NH 2 ·H 2 O+NaCl+Na 2 CO 3Mix sodium hypochlorite and sodium hydroxide in a certain proportion to prepare a solution, add urea and a small amount of potassium permanganate while stirring, and heat to 103～104℃ for oxidation reaction.
