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Melgar
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Quote: Originally posted by Maroboduus  | | Try bubbling it through 2 flasks. The first one will absorb most of the ammonia in getting to the point where ammonia passes through. That means the
second one will get much less and absorb it pretty well. Could you use any ammonia salts? When you do your runs put different acids in the second
bottle and make ammonium sulphate, phosphate, hydrochloride, acetate. The acid will do a great job of scrubbing the air, and if you don't need the
salts you can regenerate ammonia from them with more lye |
Or you could capture it in 5% ammonia from the store, then use this as your starting solution next time you make it. Really, store-bought ammonia is
probably not much different in price than distilled water, so why start at zero? If you want to make a salt to keep the smell down, ammonium acetate
will turn into acetamide when heated, and it tends to sublimate easily, so it's probably not the best salt to make. It acetic acid smells pretty
strongly too.
As far as what ammonium salt to make, phosphates would be my choice. At least the di- and triammonium phosphates will release ammonia when heated
sufficiently, if your goal is reclaiming it later. Also makes a great fertilizer, or yeast nutrient for brewing.
Edit: I'm not sure why everyone thinks you need lye to make ammonia from ammonium salts. That's only true for the salts of volatile acids like HCl
and HNO3, and ammonium bisulfate. Urea, and any sulfate or phosphate salt with at least two ammonium ions will give them up with just an application
of heat. The only issue is possible suck-back, but you can solve that problem forever just by buying a handful of cheap one-way fuel valves on eBay
for about $1 apiece. I mean, it may be easier, I guess, but I try not to use $7/pound NaOH unless I really need to.
[Edited on 10/16/16 by Melgar]
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MineMan
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Thank you all for the responses, urea is cheap, but NaOH... seems a little expensive...
It seems like it would cost about the same to just buy it depending on the ratio of NaOH to Urea...
I will have to look into what melgar is suggesting.. Thank you!!
Cheers to All!
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Melgar
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Hydroxides don't have to ionize to be hydroxides. Magnesium hydroxide, for example, barely ionizes at all. Still a hydroxide.
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DraconicAcid
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| Quote: Originally posted by Melgar |
Hydroxides don't have to ionize to be hydroxides. Magnesium hydroxide, for example, barely ionizes at all. Still a hydroxide.
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That's because it contains hydroxide ions (it barely ionizes because it barely dissolves). Aqueous ammonia contains ammonia molecules and water
molecules.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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Melgar
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| Quote: Originally posted by MineMan | Thank you all for the responses, urea is cheap, but NaOH... seems a little expensive...
It seems like it would cost about the same to just buy it depending on the ratio of NaOH to Urea...
I will have to look into what melgar is suggesting.. Thank you!!
Cheers to All! |
I've done this before plenty of times, mostly trying to make potassium cyanate. Always a massive amount of ammonia gas generated. If you're going to
get rid of the cyanuric acid that's left over, my only advice would be to use some sort of disposable container, preferably metal. Cyanuric acid,
when cooled, looks and feels like hardened plaster, and is just as much fun to clean out of glassware.
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Bert
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| Quote: Originally posted by MineMan | Hello All,
I am looking for 26-29% Ammonium Hydroxide.
I am quite surprised by how expensive it is, I bought a liter from ebay for about $20.
I know this chemical is used in industry extensively, and in vast quantities, so I am surprised at the difficulty of acquisition.
It does not need to be lab grade.
After another search this is the cheapest I can find.. but they want $25 for shipping: http://www.hvchemical.com/ammonium-hydroxide-28-1-gal-aqua-a...
I live in a town of over a million in the States, are there any types of stores you think I would have luck with?
Or other websites?
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Blueprint developer is about the cheapest, strogest ammonia solution commonly available OTC.
28% cost about $64.00 for a case of 4 gallons, plus about $7.00 for a local courier company to deliver, last time I needed some.
Try looking for a blueprint machine/supply store, ask at a local graphic materials supplier, enginering supply, etc. if you can't find it online. A
local purchase without outrageous shipping should be possible in just about any decent sized USA metro area.
Rapopart’s Rules for critical commentary:
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2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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MineMan
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Bert,
Thank you much!
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NitratedKittens
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| Quote: Originally posted by aga |
Huh ?
Ammonia dissolves up to 47 w% in ice cold water.
Is that not the same as making Ions ?
Is dissolution not the same as ion-making ?
(well, it wasn't for the monasteries i guess)
I can feel an 'aga is a dumfuk' moment about to happen (again). |
No, actually what what happens when ammonia hits water is hydrogen bonds form between the lone pairs on the ammonia and the hydrogens on the water and
vice-versa this is why water has such a great affinity for ammonia.
Attachment: Ammonia.tiff (45kB)
This file has been downloaded 781 times
Basket of kittens for you ........BOOM
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