Ubya
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solvent tin can lied about its composition, but it may contain phenol
I bought a tin of solvent that "had" as composition only toluene and methanol.
while trying to mix it with water to see how much was toluene and how much was methanol i saw something i didn't expect.
first of all, the smell, this stuff doesn't smell like toluene, or methanol, it smells like DAS (an italian synthetic modelling clay), then when i
poured it into a graduated cylinder i could see that this solution is not clear at all, it is milky white, and on addition of water i don't get 2
phases....
searching on the web i found a pdf with the real composition of this stuff (but still very generic).
it should contain "oil from carbonic bitumens" (literal translation, i have no idea of what it means), phenol and sodic soap.
now i'm interested in the phenol![:D](./images/smilies/biggrin.gif)
whatever this "oil of carbonic bitumens" is (a heavy hydrocarbons mixture maybe), it is apolar, so if it wasn't for the soap, i could add a base and
extract the phenolate in aqueous solution.
so how do i get rid of this soap?
if i acidify the solution it should turn the soap back into the fatty acid and inorganic salt (that would precipitate out), but now if i try to basify
again to make the phenolate, i will also make the soap again...
do you know a way to get around this? i have 1L of this stuff
[Edited on 26-6-2020 by Ubya]
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feel free to correct my grammar, or any mistakes i make
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Ubya
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ok probably i got double lied, i tested this stuff with iron (III) chloride, and i got no color change....
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draculic acid69
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First step is distill out the methanol/toluene and then continue heating gently until the next best.p. is reached shall help u tell what is in it.
Then u might need to a/b any residual soaps/phenols depending on what you think u have
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Ubya
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Quote: Originally posted by draculic acid69 ![](images/xpblue/lastpost.gif) | First step is distill out the methanol/toluene and then continue heating gently until the next best.p. is reached shall help u tell what is in it.
Then u might need to a/b any residual soaps/phenols depending on what you think u have |
today i'll try to distill some of it, but i'm pretty sure it doesn't contain any toluene or methanol
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draculic acid69
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That changes things then. I guess you just need to take a shot in the dark.
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DraconicAcid
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Distillation should give you an idea of what volatile components are in it, as well as getting rid of any surfactants that are present.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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