| Pages:
1
2 |
Runningbear
Harmless
Posts: 37
Registered: 4-9-2009
Member Is Offline
Mood: No Mood
|
|
Nitric acid - commercial sources
I have heard that you can buy 10% nitric acid solution OTC and also that it's found in some brands of lime scale remover at concentrations of up to
30%. However, I've been unable to find anything like this. Does anyone know the brand names of some products that are just diluted nitric acid and
nothing else.
|
|
|
Ephoton
Hazard to Others
Posts: 463
Registered: 21-7-2005
Member Is Offline
Mood: trying to figure out why I need a dark room retreat when I live in a forest of wattle.
|
|
I am only posting this as I might get my name over the whole board and become
a post whore there for ........
will I eva get any 
picking juice for tig welds.
it is about 30% nitric then a heap of goop and some HF.
distill and you should get nitric.
e3500 console login: root
bash-2.05#
|
|
|
Jor
National Hazard
Posts: 950
Registered: 21-11-2007
Member Is Offline
Mood: No Mood
|
|
And what apparatus would you use to distill the mixture of HF and nitric? That might be a little bit difficult, as glass disolves, and many metals...
|
|
|
bilcksneatff
Hazard to Self
Posts: 54
Registered: 11-11-2007
Location: Maryland, USA
Member Is Offline
Mood: Sulfuric
|
|
What about converting the acids to the calcium salts? Calcium fluoride is insoluble and calcium nitrate is soluble...then you could always distill
the nitric using sulfuric acid...
|
|
|
1281371269
Hazard to Others
Posts: 312
Registered: 15-5-2009
Member Is Offline
|
|
In the UK:
lpchemicals.com send to home addresses, this is reagent grade 70% (I have a bottle in my lab)
abbey-chemicals.co.uk is another site, but I looked at their HNO3 and it's made by LP
A much better bet is seeing if someone on the forum will sell you some. But surely you can get drain cleaner and a nitrate?
|
|
|
hissingnoise
International Hazard
Posts: 3940
Registered: 26-12-2002
Member Is Offline
Mood: Pulverulescent!
|
|
One good thing about 70% is that upping the conc. doesn't use up your H2SO4. . .
You could say you're an artist and need it to etch copper plates for printing.
|
|
|
1281371269
Hazard to Others
Posts: 312
Registered: 15-5-2009
Member Is Offline
|
|
Come to think of it, would organic impurities in the drain cleaner react with the HNO3...probably  . I suppose if you did it at above the BP of HNO3 then most would be boiled off before it had reacted. Dehydrating the
acid would have the same issues.
|
|
|
entropy51
Gone, but not forgotten
Posts: 1612
Registered: 30-5-2009
Member Is Offline
Mood: Fissile
|
|
Quote: Originally posted by Mossydie  | | Come to think of it, would organic impurities in the drain cleaner react with the HNO3...probably . I suppose if you did it at above the BP of HNO3 then most would be boiled off before it had reacted. Dehydrating the
acid would have the same issues. |
Mossydie, just quit buying that crap drain cleaner that's 30% organic
additives. The Rooto I get is clear as water and causes no problems with nitric.
|
|
|
chloric1
International Hazard
Posts: 1146
Registered: 8-10-2003
Location: GroupVII of the periodic table
Member Is Offline
Mood: Stoichiometrically Balanced
|
|
| Quote: |
Mossydie, just quit buying that crap drain cleaner that's 30% organic additives. The Rooto I get is clear as water and causes no problems with nitric.
|
You know entropy, I have never done since I have had a HUGE bottle of 70% HNO3 for 7 years and used to think nitrates would always be readily
available. But, a couple of weeks ago when I saw that I have only a few hundred millilters left, I knew I had choices. One, do what I did 7 years ago
and drive 120 miles one way and spend $50 on 2.5 liters plus $35 in gas. Second, order $100 worth of acid from other supplier to justify the hazmat
shipping, or lastly use some of my nitrate reserves and my $9 Rooto half gallon and get to work. Hmmm I like the last choice . I just can't get over
how easy it is! The so call red fuming acid is really yellow and adding water to 50 or 60% concentration turns it crystal clear. I want to see if I
can clear up the fuming acid with a pinch of urea. Have you ever made aqua regia with 99% nitric acid? Neat ain't it
[Edited on 9/22/2009 by chloric1]
[Edited on 9/22/2009 by chloric1]
Fellow molecular manipulator
|
|
|
entropy51
Gone, but not forgotten
Posts: 1612
Registered: 30-5-2009
Member Is Offline
Mood: Fissile
|
|
Yeah, I sort of enjoy making HNO3 myself. I refuse to pay hazmat on anything I can make myself. And I'd rather not have huge stocks of HNO3 and
other hazardous materials here, so I make stuff as I need it. It takes my breath away when members mention a huge stock of something hazardous. I'd
rather clean up a small spill.
But I've never tried aqua regia with 99%. Bromine and HCN are way exciting enough for me!
|
|
|
Magpie
lab constructor
Posts: 5939
Registered: 1-11-2003
Location: USA
Member Is Offline
Mood: Chemistry: the subtle science.
|
|
If you have the equipment making nitric acid is really quite easy. I'm making some right now, as I type. Just set the heat control and let it go. I
make it in about 120 ml batches. I made a batch yesterday and decided that while I had the equipment set up I'd just make another batch today.
I have given a thought to buying a 2.5L jug. But I have a bunch of KNO3 and Rooto, so, as entropy says, why pay hazmat.
The single most important condition for a successful synthesis is good mixing - Nicodem
|
|
|
1281371269
Hazard to Others
Posts: 312
Registered: 15-5-2009
Member Is Offline
|
|
I haven't bought any of the crap drain cleaner since the first 1L bottle which I decolourized and use for rubbish applications (like making piranha
acid to clear the bit of orange peel I couldn't get of the RBF the other day).
I have 5l of reagent grade and a litre or so concentrated battery acid, so I'm pretty set on that front. But the suggestion was for the person who
opened the thread.
If I manage to get that quickfit equipment I asked about I should be able to try making RF HNO3 soonish (though I have no applications in mind for the
stuff)
|
|
|
Runningbear
Harmless
Posts: 37
Registered: 4-9-2009
Member Is Offline
Mood: No Mood
|
|
Thanks for the feedback guys. I want the nitric for making Aqua Regia. The plan is to distill 10 ml or so with the help of a salted ice water bath for
the receiving flask. i have 96% Sulfuric acid already.
Is this the best approach?
thanks
Runningbear
|
|
|
Klute
International Hazard
Posts: 1378
Registered: 18-10-2006
Location: France
Member Is Offline
Mood: No Mood
|
|
Well, in nFrance you can get 65% HNO3 over the counter, for like 3e a liter.. Tha's why I couldn't understand the number of posts on manufacturing
HNO3 while it was one of the most availble things to me.. It's actually easier to get water-clear HNO3 than H2SO4!
\"You can battle with a demon, you can embrace a demon; what the hell can you do with a fucking spiritual computer?\"
-Alice Parr
|
|
|
Contrabasso
Hazard to Others
Posts: 277
Registered: 2-4-2008
Member Is Offline
Mood: No Mood
|
|
Availability depends on the country in which you live! 35% nitric in used as pH down in some Hydroponics.
|
|
|
GaryC
Harmless
Posts: 1
Registered: 26-9-2009
Member Is Offline
Mood: No Mood
|
|
I source dilute nitric acid (38%) from hydroponics stores, where it is sold as a pH adjuster. For conc. nitric, I react conc. (97-98%) sulphuric acid
(drain opener) with solid sodium nitrate and collect the vapours in a all-glass Quickfit distillation set-up.
|
|
|
1281371269
Hazard to Others
Posts: 312
Registered: 15-5-2009
Member Is Offline
|
|
Or indeed with teflon tape covered bungs. For over 70% distill again under vacuum.
|
|
|
hissingnoise
International Hazard
Posts: 3940
Registered: 26-12-2002
Member Is Offline
Mood: Pulverulescent!
|
|
Mossydie, distilling HNO3 from NaNO3/H2SO4 in a quick-fit apparatus will give 95% HNO3 (or better) at normal pressure. . .
|
|
|
1281371269
Hazard to Others
Posts: 312
Registered: 15-5-2009
Member Is Offline
|
|
I'm sorry about that - I've been reading up on it and realised my mistake, which was from misunderstanding a video I watched a while back. Vacuum is
for removing the dissolved NO2 to make white fuming right?
Here are some other methods:
http://www.youtube.com/watch?v=2yE7v4wkuZU&feature=fvw
To then get pure 70% would one calculate the concentration of the distilled HNO3 and add the correct amount of water, or simply add an excess of water
and redistill?
|
|
|
hissingnoise
International Hazard
Posts: 3940
Registered: 26-12-2002
Member Is Offline
Mood: Pulverulescent!
|
|
Distilling at reduced pressure causes the HNO3 to distill at lower temperature so that there's little decomposition to NO2.
When diluting strong HNO3 bear in mind that its density is ~1.50. . .
For 70% add 1 litre of strong acid to 45ml water with stirring.
[Edited on 26-9-2009 by hissingnoise]
|
|
|
entropy51
Gone, but not forgotten
Posts: 1612
Registered: 30-5-2009
Member Is Offline
Mood: Fissile
|
|
That can't be right, can it?
|
|
|
hissingnoise
International Hazard
Posts: 3940
Registered: 26-12-2002
Member Is Offline
Mood: Pulverulescent!
|
|
Ooops! You're right entropy51---it should of course be 450ml---missed a zero. . .
I meant to write; 100ml to 45ml.
|
|
|
1281371269
Hazard to Others
Posts: 312
Registered: 15-5-2009
Member Is Offline
|
|
If the % HNO3 produced could be between 95% and 100%, then the amount of water to add surely can't be definite...?
|
|
|
hissingnoise
International Hazard
Posts: 3940
Registered: 26-12-2002
Member Is Offline
Mood: Pulverulescent!
|
|
No, that's a rough estimate, but for an exact figure you'd need to check the acid density with an hydrometer and do the math. . .
|
|
|
Runningbear
Harmless
Posts: 37
Registered: 4-9-2009
Member Is Offline
Mood: No Mood
|
|
Can someone confirm for me the concentration of nitric acid that is required for aqua regia. Is 70% nitric acid sufficient to disolve metal? or does
it have to be higher.
|
|
|
| Pages:
1
2 |
![[*]](images/xpblue/default_icon.gif){kind=icon}
