symboom
International Hazard
Posts: 1143
Registered: 11-11-2010
Location: Wrongplanet
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Mood: Doing science while it is still legal since 2010
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Hydrazine from Nitrourea
Is this possable this should not be a dart in the dark
Hydrazine is formed from urea being oxidized with hypochlorite to form hydrazine
Urea nitrate is urea that has been oxidized to urea nitrate
Nitrourea reduced to semicarbazide
Or to carbohydrazide
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Boffis
International Hazard
Posts: 1867
Registered: 1-5-2011
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@ symboom, I am not quite sure what you are asking since you seem to have two only vaguely connected ideas but yes Hofmann degradation of urea with
alkali and hypochlorite has been used to prepare hydrazine. UTFSE there is a lot of data on the forum about this and related procedures already.
Secondly urea nitrate is a simple salt of urea, nothing is oxidized in its formation. When dehydrated with a suitable reagent it give nitrourea, a
nitramine type compound, which when reduced yields semicarbazide. The reduction used to be a commercial route to this compound and was carried out
electrochemically. There are several patents out there in the digital ether and in English too concerned with this reduction. There are also several
published laboratory scale reduction ouit there too though the usual laboratory preparation of semicarbazide uses alkali cyanate and hydrazine
sulphate.
Carbohydrazide is not prepared by this route (probably because of the difficulty in preparaing dinitrourea; search this forum for info on this too)
but is easily prepared by ammonia displacement using hydazine on urea or cyanuric acid etc; there are several patents posted on this forum concerning
the preparation of this material.
So to summarise:
1) Please put a little more care into you initial question to ensure that you get a sensible answer
2) UTFSE first
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