Cleaning kno3
Self Defenestrate, Mon Apr 17 2006, 06:43PMI've got about a tablespoon of potassium nitrate, but it's a bit black because of some airfloat charcoal in it. I've disolved and recrystalized it twice now, but theres still alot of charcoal left mixed with the stuff. So, any ideas on how I might get the two seperated?
Re: Cleaning kno3
Hazmatt_(The Underdog), Mon Apr 17 2006, 08:59PM
centrafuging comes to mind....but that can be tricky.
What you could do is dissolve it in a large enough solution such that the carbon remains at the bottom of a large column, then decant off your KNO3 and let it evaporate. I think this is a reasonable approach and requires maybe a 1L cylinder, which is no big deal.
Hazmatt_(The Underdog), Mon Apr 17 2006, 08:59PM
centrafuging comes to mind....but that can be tricky.
What you could do is dissolve it in a large enough solution such that the carbon remains at the bottom of a large column, then decant off your KNO3 and let it evaporate. I think this is a reasonable approach and requires maybe a 1L cylinder, which is no big deal.
Re: Cleaning kno3
Self Defenestrate, Tue Apr 18 2006, 12:47AM
Decanting, totally slipped my mind. I'll give it a try tonight.
Self Defenestrate, Tue Apr 18 2006, 12:47AM
Decanting, totally slipped my mind. I'll give it a try tonight.
Re: Cleaning kno3
cbfull, Tue Apr 18 2006, 12:33PM
I take it you have already tried to filter it. That would be the first thing I would try.
cbfull, Tue Apr 18 2006, 12:33PM
I take it you have already tried to filter it. That would be the first thing I would try.
Re: Cleaning kno3
Self Defenestrate, Wed Apr 19 2006, 01:58AM
Filtering did nothing, it all slipped right through. Decanting, diluting, and repeating worked just fine. It all crystallized out after a good boil down, resulting in some real nice white kno3 after a round with the mortar and pestle.
Self Defenestrate, Wed Apr 19 2006, 01:58AM
Filtering did nothing, it all slipped right through. Decanting, diluting, and repeating worked just fine. It all crystallized out after a good boil down, resulting in some real nice white kno3 after a round with the mortar and pestle.
Re: Cleaning kno3
Jim, Wed Apr 19 2006, 04:00AM
KClO4 works better.
Jim, Wed Apr 19 2006, 04:00AM
KClO4 works better.
Re: Cleaning kno3
Hazmatt_(The Underdog), Wed Apr 19 2006, 05:50AM
glad it worked.
Hazmatt_(The Underdog), Wed Apr 19 2006, 05:50AM
glad it worked.
Re: Cleaning kno3
evilgecko, Thu Apr 20 2006, 06:12AM
What do you need a tablespoon of KNO3 for? It seems like alot of effot for that!
evilgecko, Thu Apr 20 2006, 06:12AM
What do you need a tablespoon of KNO3 for? It seems like alot of effot for that!
Re: Cleaning kno3
Self Defenestrate, Thu Apr 20 2006, 04:37PM
It was left over stuff from some black powder I made, and it got some of the charcoal dusted over it just from it settling out of the air. I figured I might try cleaning it out just because I had my glass out and had nothing better to do. After that, I mixed it with a bit of sugar, filled my lab/garage with smoke, and had some fun with the various hene's lying around. Of course KClO4 is better than KNO3, but NH4ClO4 is better than KClO4...
Self Defenestrate, Thu Apr 20 2006, 04:37PM
It was left over stuff from some black powder I made, and it got some of the charcoal dusted over it just from it settling out of the air. I figured I might try cleaning it out just because I had my glass out and had nothing better to do. After that, I mixed it with a bit of sugar, filled my lab/garage with smoke, and had some fun with the various hene's lying around. Of course KClO4 is better than KNO3, but NH4ClO4 is better than KClO4...
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