Cou
National Hazard
Posts: 958
Registered: 16-5-2013
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Mood: Mad Scientist
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Report on purification of octyl acetate w/ DES, and Keq of fischer esterification
Neither a deep eutectic solvent made of glycerin and choline chloride, nor water, were able to extract 1-octanol from octyl acetate. However,
extraction is unnecessary because the equilibrium constant of the reaction of 1-octanol and acetic acid to form octyl acetate is about 38, so if a 3
fold molar excess of acetic acid is used, the octyl acetate will be about 99% pure. a dean-stark solvent could be used to improve purity even more.
Attachment: paper2.docx (2.8MB)
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Fery
International Hazard
Posts: 1026
Registered: 27-8-2019
Location: Czechoslovakia
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Cou this is very positive information. Personally I would go via the route using Dean-Stark trap apparatus too.
This is just my idea, but if you would like to completely destroy alcohol (maybe its strong smell is still noticeable in the scent of your ester?)
then couldn't adding a little of acetic anhydride or acetyl chloride into the product containing 99% octyl acetate + 1% octanol further remove the
octanol by producing the same ester?
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