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Author: Subject: Extraction of Limonene
bereal511
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[*] posted on 13-2-2006 at 20:52
Extraction of Limonene


Recently, my friend asked me to distill the essence of lemons for her as a present for Valentine's Day. The chemical responsible for the smell of lemons is limonene, and I thought it was a simple enough extraction. So after an hour or two of cutting lemon rinds, boiling them in water, then doing a simple distillation of the liquid, I was able to obtain a liquid (which also contained water) that smelled strongly of lemons.

But after doing a bit of research, it is said that limonene is supposed to form a seperate layer from water. The liquid that I obtained does not exhibit any double layer. Should I have done the extraction differently? And how can I obtain limonene in a purer form?




As an adolescent I aspired to lasting fame, I craved factual certainty, and I thirsted for a meaningful vision of human life -- so I became a scientist. This is like becoming an archbishop so you can meet girls.
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Esplosivo
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[*] posted on 13-2-2006 at 22:28


You could try steam distillation of the rind itself. It works, although don't expect enormous yields unless you have a lot of rind. I managed to extract thin oily films, but nowhere close to 5mL yet, even though I have access to a lot of lemons and other fruits.

Limonene, which is an essential oil terpene, is being investigated for a use as an anti-cancer drug. Research shows that limonene, together with some other essential oil terpenes, may induce apoptosis of certain cancer cells. Fun isn't it? ;)

[Edited on 14-2-2006 by Esplosivo]




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unionised
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[*] posted on 14-2-2006 at 12:58


This
http://www.oxyboost.com/products/orange100.html
would be cheating.:D
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chochu3
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[*] posted on 14-2-2006 at 14:58


Lemon grass will yield a greater yeild. We tried on of these in lab in my first organic chem lab.



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bereal511
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[*] posted on 14-2-2006 at 16:47


Well, we have a lot of citrus fruit trees around here, so I just didn't want to buy anything out of the way.



As an adolescent I aspired to lasting fame, I craved factual certainty, and I thirsted for a meaningful vision of human life -- so I became a scientist. This is like becoming an archbishop so you can meet girls.
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