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Author: Subject: Is it possible to "undo" the ferric/phenolate complex?
Tacho
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[*] posted on 15-3-2007 at 04:02
Is it possible to "undo" the ferric/phenolate complex?


Adding ferric chloride to phenols usually creates a precipitate.
Is there a simple way to "undo" the ferric/phenolate complex? It would be a nice way to purify phenols, or even separate different phenols.




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jtkelectroman
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[*] posted on 15-3-2007 at 15:15


you should be able to distill it
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Tacho
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[*] posted on 19-3-2007 at 03:36


Thanks jtkelectronan, I'll try that.



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chemoleo
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[*] posted on 19-3-2007 at 15:54


How about adding NaOH, filtering the FeOH2 (squeeze hard, or boil to form denser forms) and keep the soluble Na-phenolate?



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Tacho
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[*] posted on 20-3-2007 at 03:27


Quote:
Originally posted by chemoleo
How about adding NaOH, filtering the FeOH2 (squeeze hard, or boil to form denser forms) and keep the soluble Na-phenolate?


Also a good idea...
Humm, maybe the precipitate I got in previous experiments with phenolates had a lot of FeOH2 in them since I added NaOH (carelessly) to phenols to obtain the phenolate. Maybe the phenol/ferric complex does not usually precipitate like I thought. Separation may not be so simple without a chromatography column.




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Ozone
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[*] posted on 20-3-2007 at 12:28


Try adding a solution of EDTA, and wait a while. The colored complex should disappear. Then distill (or extract) the phenol out (it distills with water). Good luck getting your phenol from the water, though.

Cheers,

O3




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