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draculic acid69
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[*] posted on 11-3-2021 at 02:09


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
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[*] posted on 7-4-2021 at 23:54


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.

IMG_20210408_075909_0_sm.jpg - 31kB IMG_20210408_075931_1_sm.jpg - 32kB IMG_20210408_075942_5_sm.jpg - 30kB IMG_20210408_080256_0_sm.jpg - 39kB IMG_20210408_080320_3_sm.jpg - 40kB

[Edited on 8-4-2021 by Fery]



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Fery
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[*] posted on 24-7-2021 at 05:37


Quote: Originally posted by Fery  
My second idea was drying NH4NO3 and then recrystallization from ethanol (only theoretical idea, never tried it practically).

http://periodic-table-of-elements.org/SOLUBILITY/ammonium_ni...
solubility in ethanol: 2,5 (20 °C), 5 (40 °C), 7,5 (60 °C)
I would very probably cool down to 0 C but I did not find solubility at such low temperature, and of course I wouldn't waste anhydrous ethanol for that and use 96% in which the solubility would be very likely somewhat higher.

http://www.sciencemadness.org/smwiki/index.php/Calcium_nitra...
Solubility in ethanol:
51.4 g/100 g (20 °C)
62.9 g/100 g (40 °C)

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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