# Chemical reactions in SFE?

What are the chemical reactions and/or chemical processes that take place during SFE(supercritical fluid extraction)? Namely supercritical $\ce{CO2}$.

• No ma'am/sir/mammal. I was looking into homemade supercritical decaffeination chamber. AppliedScience (YouTube channel) has an example. – Sciiiiience Jul 4 '14 at 22:33
• Any suggestions? I can't yet make tags so, I couldn't figure out what to put. – Sciiiiience Jul 4 '14 at 22:48

Ideally no reactions should occur during an SF extraction. In all the extractions a solvent is used to extract different substances from a matrix. In SFE the solvent is a supercritical fluid, in most of the cases is used $CO_{2}$ but not always. The chemicals process related to the extraction is mainly the solubilization of the target substance in the SF depending on the properties of the target substance and the SF (e.g. polar or non polar).