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draculic acid69
International Hazard
Posts: 1371
Registered: 2-8-2018
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Quote: Originally posted by Brightthermite  | | Ive continued oven drying while I make the time to go pick up some DampRid and my AN has picked up some strange dark spots. I check the top of the
oven and nothing is dripping down on it. Any ideas? |
Ovens will contaminate any product U dry out in them.once I put a dish in there came back and there was heaps of dark grease all thru the
product.unless U have a dedicated never had food in it oven don't use it
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Fery
National Hazard
Posts: 990
Registered: 27-8-2019
Location: Czechoslovakia
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I have cca 10 kg of ammonium nitrate with dolomite fertilizer (75-80% AN + 20-25% dolomite).
I dissolved some fertilizer in water (lasts longer as it is very endothermic), let to settle dolomite in a flask, carefully slowly dropwise siphoned
the clear liquid using a narrow hose. Added 1 ml of 24% ammonia and let in open beaker to allow CO2 to enter and precipitate CaCO3 and MgCO3 from
contaminants Ca(NO3)2 and Mg(NO3)2 coming from dolomite reacting with acidic AN. Then filtered and evaporated some of the water on my stove while
burning wood during cold outside weather, but did not concentrate too much (small crystals from too much concentrated solutions). Then let overnight
outside at 0 C. These beautiful big crystals grew in 1 L beaker.
I decanted the mother liquor and I'm going to concentrate it to obtain second crop of the crystals and very likely third, fourth... crop then. I won't
concentrate it too much, I plane to evaporate approximately 100 ml from current 600 ml every step and then cool down to 0 C.
    
[Edited on 8-4-2021 by Fery]
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Fery
National Hazard
Posts: 990
Registered: 27-8-2019
Location: Czechoslovakia
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here they tried ethanol as a solvent to separate NH4NO3 from (NH4)2SO4:
https://www.youtube.com/watch?v=RiiR5Y0yO0A
methanol should be even better (less solvent necessary due to higher solubility)
maybe the separation could be done in Soxhlet apparatus to further reduce the amount of the solvent
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