# Solvent for caffeine extraction [closed]

Can anybody please help me find a way to separate caffeine from coffee that uses a solvent other than DCM, ethyl acetate, or diethyl ether?

This an experiment for science class, but I don't have access to any of the above-mentioned solvents.

Can you suggest any alternatives that are easily obtainable?

• Supercritical $CO_2$? – Buck Thorn Apr 8 '19 at 20:49
• It is kind of silly for us to guess 50 solvents to try and find one that you can use. I suggest you use Google "Extraction of Caffeine" and find a suitable solvent yourself. // I know that you are not going to have the equipment to use supercritical carbon dioxide. – MaxW Apr 8 '19 at 20:53
• Can you use Acetone? – Waylander Apr 8 '19 at 21:25
• It would be better to re-word your question by stating the names of solvents which are available to you. – M. Farooq Apr 8 '19 at 23:00
• Your question isn't bad. The wording has been improved, but people who leave "drive-by downvotes" probably won't return to notice and change them, so I"m voting +1 since your question as currently written seems reasonable enough to at least be non-negative! – uhoh Apr 9 '19 at 1:54

$$\begin{array}{|c|c|c|c|c|c|} \hline \textrm{Solvent} & \textrm{Temperature, } \pu{^{\circ}C} & \textrm{Solubility, } \pu{\%} (w/w) \\ \hline \textrm{Water} & 25 & 2.2 \\ \hline \textrm{water} & 100 & 66.7 \\ \hline \textrm{Ethanol} & 25 & 1.2 \\ \hline \textrm{ Ethanol} & 60 & 4.5 \\ \hline \textrm{Ether} & 25 & 0.3 \\ \hline \textrm{Ethyl Acetete} & 25 & 2.5 \\ \hline \textrm{Chloroform} & 25 & 18.0 \\ \hline \textrm{Acetone} & 25 & 2.0 \\ \hline \textrm{Benzene} & 25 & 1.0 \\ \hline \end{array}$$
My suggestion is to use ethanol in $$\pu{60 ^{\circ}C}$$. However, I'm not sure how ethanol would behave with the presence of tannins. For example, in a separate literature report, $$\pu{1.0 mg}$$ of tannin was isolated from a $$\pu{g}$$ of grape skins using 100% ethanol while the amount was increased to about $$\pu{5.5 mg}$$ when solvent was switched to 100% acetone (Ref.2).