GreenD
National Hazard
Posts: 623
Registered: 30-3-2011
Member Is Offline
Mood: Not really high anymore
|
|
Ammonium hydroxide - creation.
Hi,
I know that by heating ammonium carbonate one can make ammonium hydroxide, but I'm not sure how efficiently this can be done, especially without open
flame or heat gun.
How cold would your refluxer's solvent need to be to condense ammonia gas efficiently? It just occured to me you could perhaps bubble it through H2O,
but then there are some problems there as well (final concentration, etc).
If there is an OTC route to getting ammonium hydroxide, I'm all for it, but from my understanding it's not exceptionally easy to buy.
Thank yas.
ʃ Ψ*Ψ
Keepin' it real.
Check out my new collaborated site: MNMLimpact.com
|
|
|
Pulverulescent
National Hazard
Posts: 793
Registered: 31-1-2008
Member Is Offline
Mood: Torn between two monikers ─ "hissingnoise" and the present incarnation!
|
|
Reaction of alkali will displace HN<sub>3</sub> from an ammonium salt!
The evolved NH<sub>3</sub> is led to water (stirred) through an inverted funnel to prevent suck-back . . .
Stirring is necessary because HN<sub>4</sub>OH is lower in density than water!
"I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones"
A Einstein
|
|
|
GreenD
National Hazard
Posts: 623
Registered: 30-3-2011
Member Is Offline
Mood: Not really high anymore
|
|
Ok, if you have excess ammonium salt, is your final product going to be ~30% ammonia aq? Or does it go higher?
ʃ Ψ*Ψ
Keepin' it real.
Check out my new collaborated site: MNMLimpact.com
|
|
|
Pulverulescent
National Hazard
Posts: 793
Registered: 31-1-2008
Member Is Offline
Mood: Torn between two monikers ─ "hissingnoise" and the present incarnation!
|
|
It's 30% @ NTP; density - 0.880.
"I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones"
A Einstein
|
|
|
annaandherdad
Hazard to Others
Posts: 387
Registered: 17-9-2011
Member Is Offline
Mood: No Mood
|
|
Don't know where you are, but getting NH4OH OTC is pretty easy around here (California USA). Dilute solutions sold in grocery stores, and somewhat
more concentrated solutions in hardware stores. And I've never had any trouble ordering concentrated solution from chem supply places.
Any other SF Bay chemists?
|
|
|
MrHomeScientist
International Hazard
Posts: 1806
Registered: 24-10-2010
Location: Flerovium
Member Is Offline
Mood: No Mood
|
|
Woelen's also got a good method for concentrating ammonia on his site somewhere. I believe it was simply taking a large amount of household ammonia
(~5%), heating it, and leading the gas into a smaller volume of water. In his setup it doubled the concentration, but that could of course be adjusted
by changing the amounts of each liquid used.
|
|
|
Hexavalent
International Hazard
Posts: 1564
Registered: 29-12-2011
Location: Wales, UK
Member Is Offline
Mood: Pericyclic
|
|
I assume that one could lead the ammonia gas into a dilute household solution of ammonia (simply adding more gas to a dilute solution) or even that
Janitorial 10% stuff to further enhance concentration?
"Success is going from failure to failure without loss of enthusiasm." Winston Churchill
|
|
|
DJF90
International Hazard
Posts: 2266
Registered: 15-12-2007
Location: At the bench
Member Is Offline
Mood: No Mood
|
|
The household ammonia I found in the stores near me was 10%, intended mostly for cleaning windows I suspect. Smells too much to do anything else with.
|
|
|
barley81
Hazard to Others
Posts: 481
Registered: 9-5-2011
Member Is Offline
Mood: No Mood
|
|
Yeah, but the ammonia at the store frequently has surfactants and other things in it. Distilled water is better because you ensure that the product
isn't contaminated with whatever is in the ammonia. If you know your ammonia solution is pure and clean, then bubbling ammonia gas into it in order to
increase the concentration is more efficient than using distilled water.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
