mackolol
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Purifying denaturated alcohol
I was wondering if i can purify denatural by converting it to chloroethane by esterification with hcl catalysed by h2so4 distilling it and then
converting it back to alcohol using NaOH. Even if it wasnt efficient im wondering if i can get pure enough EtCl from denatural
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JJay
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Unlikely.
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Corrosive Joeseph
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Can you post your MSDS............?
/CJ
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LearnedAmateur
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Whatever you do to the ethanol, you'll also do to the methanol present (although if your formulation happens to not contain it as the denaturant then
the situation might be different). In order to substitute the hydroxyl for a chloride, you'll be better off using a Lewis acid catalyst (ZnCl2, AlCl3)
and it will need to be refluxed for a while. Chloroethane is a gas at room temperature (BP = 12.3C) so it won't be easy to collect either.
Denatured ethanol is usually blended in such a way that it's incredibly difficult to purify, for obvious reasons. I'd recommend looking for other
sources of ethanol - anhydrous is hard to obtain but you can find 95% ethanol with water online, this can be distilled if it leaves a residue, and
dried over a dessicant to >99%.
In chemistry, sometimes the solution is the problem.
It’s been a while, but I’m not dead! Updated 7/1/2020. Shout out to Aga, we got along well.
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mackolol
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There is nothing special in msds and since it is in other language it would be big effort for me to translate it. There is 92% ethanol and denaturing
agents are not given. But i think every denaturated alcohol has the same pollutants such like pyridine or thiophene. i dont know agents what are used
for this. My question is will is work for any denaturated alcohol because chloroethane has very low boiling point. I can only tell that there is no
methanol.
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mackolol
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I was wondering because pure ethanol is expensive due to excise. In my country denaturated is like 9pln for 1l and pure 90pln for 1l.
[Edited on 5-11-2017 by mackolol]
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unionised
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The high price of pure alcohol is mainly due to tax .
There must already be stacks of threads on cleaning alcohol on this site somewhere.
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Mesa
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There are a fair few denaturing agents possibly used in OTC metho. THF and/or denatonium benzoate are somewhat common over here in aus, whereas
methanol has been long banned from all denatured alcohol products here.
Location/local laws and regulations are pretty relevant here. I had a brief attempt at a project like this in UK, then in Aus, but it was way too
tedious to be useful. Later I tried again during some time in Fiji, and quickly found the local stuff I got contained only ethanol and acetone and/or
2-butanone as denaturant.
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TheNerdyFarmer
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Here the seller claims that theirs is not denatured:
https://www.ebay.com/itm/0-250ml-Ethanol-Alcohol-95-Absolute...
I don't know the legitimacy of it though. Kind of expensive too :/
[Edited on 6-11-2017 by TheNerdyFarmer]
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zed
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Oregon price is ~15$ US for 750 ml 95% Etoh, beverage grade.
Overpriced perhaps, but universally available.
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