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Topic: Essential oil extraction  (Read 3227 times)

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Offline Hollon

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Essential oil extraction
« on: March 20, 2011, 03:57:39 PM »
Hello. I am a new user at the chemical forums. My background consists of the beginning of an undergrad chemistry degree (I switched majors). I took classes through organic chem 1.

Now for my questions. I wanted to extract some essential oils to use in soap and perfume making. Cedar was the first that I tried. Since I have no lab of my own, this experiment has improvised materials.

I added an unknown amount of cedar twigs and needles to crock pot, and added water and cooked on low for 4-5 hours. I then decanted the liquid from this and threw away the solids. I added zippo lighter fluid to this (which contains mostly naptha I believe) and collected the non polar layer (I did this 4 times with probably 20mL of the lighter fluid each time). To this I added some isopropyl alcohol (91% and unknown amount) to break the emulsion that formed. I allowed this to settle and collected the non polar layer again. To this I added some 10% ammonia solution to try and salt out impurities.

And here is my question. Since this resulted in a cloudy clear liquid that hasn't settled in approx 3 hours, did I mess this up by adding ammonia? or should I just go ahead and try to evaporate the remaining naptha? Will this product be relatively pure (I realize this is a hard question to answer)? And what are your suggestions for improving this keeping in mind that I have limited access to glassware and high purity reagents?

PS. From my research the essential oil is mostly comprised of cedrol, ∀-cedrene, and thujopsene.

Offline Hollon

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Re: Essential oil extraction
« Reply #1 on: March 21, 2011, 01:14:05 AM »
Update: The non-polar solvent is no longer cloudy after it has been allowed to settle for approx. 10 more hours. There is also no precipitate. Does this mean that adding the ammonia was an unnecessary step?

Offline philonossis

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Re: Essential oil extraction
« Reply #2 on: March 21, 2011, 09:08:51 AM »
Update: The non-polar solvent is no longer cloudy after it has been allowed to settle for approx. 10 more hours. There is also no precipitate. Does this mean that adding the ammonia was an unnecessary step?

sorry I don't know this subject but someone referenced me on another subject, but on that site I found this. I can't get the page to load however.

http://library.sciencemadness.org/library/books/the_chemistry_of_essential_oils_and_artificial_perfumes_i.pdf

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