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Author: Subject: help purifying potassium hydroxide (drain cleaner)
BeanyBoy
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[*] posted on 30-3-2007 at 01:52


Quote:
Originally posted by 12AX7
The red jug of 'fire I have is slightly yellowish. No apparent dye.
Tim


Mine is beyond slightly yellow, its a real dark yellow, almost brown viscous fluid. I thought I recalled a thread here where it was mentioned this is the normal appearance for this 98% stuff.

However, when diluted down to about 33.5%, it lightened up to a light yellow; that's battery acid con., and I don't recall ever seeing battery acid being yellow tinged.

When I bought it down the street, I was offered both quarts and gallons. I believe I will get a gallon next time.
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elementcollector1
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[*] posted on 21-2-2012 at 15:36


I have another KOH product that is only 1-10% KOH and <5% NaOCl. Do I just boil this down to get mostly KOH? If so, then what do I do to get rid of the NaOCl?



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Hexavalent
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[*] posted on 28-2-2012 at 12:55


Why not just purchase pure KOH on eBay? People seem to sell it all the time for making biodiesel and whatnot. Seems like too much hard work to try and purify all of this.



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elementcollector1
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[*] posted on 28-2-2012 at 21:40


Actually, what about the old-school method? Causticizing potash from plant ashes?



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CrimpJiggler
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[*] posted on 29-2-2012 at 11:33


The dye should be the least of your worries. Activated charcoal should get rid of the dye. What is all this "inert" stuff? That would be my biggest concern.
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