Ammonia → Azanium nitramide

Temperature

-50 °C

This solution was then added to a suspension of 7.5 grams (49.7 mmoles) of the ammonium N-nitrourethane prepared in Example I and suspended in 200 ml of methylene chloride which had been previously cooled to -50° C. before the addition. The reaction was allowed to proceed for one hour, warming to -30° C. over that hour. Excess ammonia gas was then added to raise the pH to 10. The solution was then filtered and the insoluble material was collected and digested 20 min in 150 ml of acetonitrile. The resulting suspension was filtered, and the filtrate was passed through a 4"×1" column of 230-400 mesh silica-gel, eluting with CH3CN. The filtrate was concentrated to 30 ml and treated with 30 ml CHCl3, resulting in the precipitation of 4.0 g of pure crystalline ammonium dinitramide mp 90-93° (60% yield).

1. temperaturewarming to -30° C. over that hour
2. temperatureto raise the pH to 10
3. filtrationThe solution was then filtered
4. customthe insoluble material was collected
5. waitdigested 20 min in 150 ml of acetonitrile
6. filtrationThe resulting suspension was filtered
7. washeluting with CH3CN
8. concentrationThe filtrate was concentrated to 30 ml
9. additiontreated with 30 ml CHCl3

ORD record

ord-5cb76b01d7da4befb1aa8e04e430e409

Source dataset

uspto-grants-1995_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05415852