jimwig
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liquid liquid seperation
benzaldehyde and polyethylene glycol (d=?) in solutiion
wish to seperate the two and or impurities.
liquid to liquid ?
just wondering what might be an efficient method.
no real app here.
craZy jiM wGGns
--packrat, professional bum. -- once just tired
now REtired.
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Nicodem
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Distillation with steam.
PS: You could have used our new "short question" thread for this.
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DNA
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Column Chromatography would do a great job, although would be quite expensive and time-consuming (steam distilation also takes ages) but they
definately would have quite different Rf's so they are well seperatable.
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Klute
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I think PEG is quite soluble in water, you could add waterand extract the aldehyde with toluene or another non poalr solvent (don't use esters etc).
Or you could try a bisulfite extarction. This topic has been discussed endlessly here and elsewhere.
\"You can battle with a demon, you can embrace a demon; what the hell can you do with a fucking spiritual computer?\"
-Alice Parr
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mechem
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Hi kute
Why do you say don't use ethers.
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Panache
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| Quote: | Originally posted by mechem
Hi kute
Why do you say don't use ethers. |
Its Klute and he said don't use 'esters' because they react like esters do at elevated temperatures with aldehydes. Ethers won't react and would be
fine to use as extraction solvents.
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Klute
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I was rather thinking of the polarity issu, polar solvent slikes esters might dissolve more PEG. Something like toluene would be perfect for
benzaldehdye, but would hardly reclaim any PEG IMHO.
\"You can battle with a demon, you can embrace a demon; what the hell can you do with a fucking spiritual computer?\"
-Alice Parr
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chemrox
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precipitate the benzaldehyde bisulfite complex as Klute mentioned above
"When you let the dumbasses vote you end up with populism followed by autocracy and getting back is a bitch." Plato (sort of)
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