deams - 30-11-2003 at 09:54
Does anyone have a suggestions as to which method is the most efficient (yield) to produce Azodicarbonamide?
Thanks
[Edited on 30-11-2003 by deams]
unionised - 1-12-2003 at 14:59
The commercial prep. is the reaction of hydrazine with urea then oxidation with (IIRC) chlorine.
addendum
Hermes_Trismegistus - 2-12-2003 at 00:45
Urea is commonly available, chlorine easily liberated from chlorides, chlorites and chlorates.
Hydrazine synth is discussed (ad nauseum) in another thread.
KABOOOM(pyrojustforfun) - 3-12-2003 at 06:48
from industrial inorganic chemistry:
2H<sub>2</sub>NCONH<sub>2</sub> + N<sub>2</sub>H<sub>4</sub> +
H<sub>2</sub>SO<sub>4</sub> <s> ></s>
H<sub>2</sub>NCONHNHCONH<sub>2</sub> + (NH<sub>4</sub><sub>2</sub>SO<sub>4</sub>
H<sub>2</sub>NCONHNHCONH<sub>2</sub> + Cl<sub>2</sub> <s> ></s>
H<sub>2</sub>NCON=NCONH<sub>2</sub> + 2HCl
it doesn't give any further information. I think in the first reaction semicarbazide forms as intermediate which then reacts with another urea
molecule to form HDC. if I remember correctly for the oxidation step H<sub>2</sub>O<sub>2</sub> can be used.