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This topic was originally posted in this forum: Explosives
Author Topic:   confused
darcey
Frequent Poster 		posted November 01, 1999 05:10 PM     Click Here to See the Profile for darcey     
i'm a bit confused. In the recent post about washing ammounium nitrate i asked how you would take off the protective layer of what ever it is, off fertilizer grade AN. some people wrote in and i got two different answers about drying the AN. One person siad that it was to be dryed at a low temp ( because it decomposes) and another said that he leaves it in an oven for 3 hours at a high temp. Which it right??


Ho ju
Moderator 		posted November 01, 1999 05:12 PM     Click Here to See the Profile for Ho ju   Click Here to Email Ho ju     
i believe a long time at low temp. mega said in another post ammonium nitrate decomposes at 400 celcius so your oven will not over do it.

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Knowledge is power, power leads to corruption, corruption is a crime, crime doesn't pay. So if you know to much you will go broke!!




nbk2000
Moderator 		posted November 01, 1999 06:22 PM     Click Here to See the Profile for nbk2000   Click Here to Email nbk2000     
I've dried mine in the oven at 300F and the AN was just fine. I've also decomposed it on purpose to make nitrous oxide at about 450F so you have plenty of leeway to dry it without it breaking down.

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"The knowledge that they fear is a weapon to be used against them." www.50megs.com/nbk2000



megalomania
Administrator 		posted November 02, 1999 01:38 PM     Click Here to See the Profile for megalomania   Click Here to Email megalomania     
Actually I should not have just pulled that number from memory, I was also confusing by my reference to Celsius (that I use in the lab) and to Farenheit (which I use on my American oven). Ammonium nitrate decomposes at 210 °C which is more than twice the boiling point of water at 212 °F. All you need to do is heat it over the boiling point of water. Even then, all you need to do is drive off water, any temp above room temp will do (up to 210 of course), it just depends on how long you want this to take.

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