Dwarvensilver
Hazard to Self
Posts: 52
Registered: 8-6-2016
Member Is Offline
Mood: Constantly Chemically Amazed
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Potassium Hydroxide sodium sulphite separation
Hello all,
Part of what I do is arrange for unneeded chemicals to be disposed of. When I looked up the MSDS I found that a boiler chemical that I have about 45L
to dispose of is 5-10 %w/w. KOH.
I started to evaporate off about 600mL to see how hard it would be to concentrate.
After evaporating off ~200 mL I put it aside, next day I have crystals growing in it, long clear monoclinic like Sodium sulphite. I think Sulphite
cause the crystal habit is different than sulphate.
After fishing out some after drying an hr or so they started showing signs of dehydration, turning to white powder.
If it has sodium sulphite/sulphate in it, can it be or is it worth the effort to separate it for the KOH?
Thanks,
Dwarvensilver
There is nothing more useless than doing well that which need not be done at all.
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Dwarvensilver
Hazard to Self
Posts: 52
Registered: 8-6-2016
Member Is Offline
Mood: Constantly Chemically Amazed
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|
I checked the solubilities and I should be able to crystalize out most of the sodium sulphite i think. We shall see ☺
Hmm not many thoughts on the subject  .
Note: this process is for me to collect KOH for synthesis, not to save money at work lol
It is really hard for me to dispose of tens of containers of chemicals when they can be used for experimentation and knowledge 
[Edited on 2016-11-6 by Dwarvensilver]
[Edited on 2016-11-6 by Dwarvensilver]
There is nothing more useless than doing well that which need not be done at all.
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