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Liquid-Liquid extraction: Hexane v.s. Dichloromethane


Elite Engineer

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If you are extracting eugenol from water both solvents will work.

One point to remember, eugenol is slightly denser than water and hexane is less dense. If you are unlucky, you will end up with a mixture that's the same density as water and it won't settle out.

You can avoid that, and improve the extraction efficiency, by saturating the liquid with salt.

 

Also, hexane has a huger boiling point, so it's more difficult to remove.

 

You can improve the purity somewhat if you make use of the fact that eugenol will dissolve in dilute alkali.

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