which can be used in the manufacture of ammonia, ammonia nitrogen fertilizer (urea, producyion, etc.), compound fertilizer, nitrate, ammonium salt, soda ash, etc., are widely used in chemical industry, light industry, chemical fertilizer, pharmaceuticals and synthetic fibre etc.
Can ammonia, which is so versatile, burn?
Ammonia’s ignition point is 651¡æ, so pure ammonia is not easy to burn.
It can be liquefied by pressurizing it at room temperature (critical temperature 132.4 ¡ã C, critical pressure 11.2 mpa, 112.2 atmospheres).
Boiling point 33.5 ¡æ.
It is also easily solidified into a snow solid.
Melting point – 77.75 ¡æ.
Soluble in water, ethanol and ether.
At high temperature, it will decompose into nitrogen and hydrogen gas, which is reductive.
Can be oxidized to nitric oxide in the presence of a catalyst.
But ammonia and air mixed, the situation is different, its explosion limit is about 16 ~ 25%(the most easy ignition concentration is 17%), when the ammonia content in the air to reach the above concentration range, in the case of open fire will burn and explode.