During oil extraction, hexane was used and reflux happened , what is their contibution to the experiment

Hexane has been widely used for oil extraction because of easy oil recovery, narrow boiling point (63–69 °C) and excellent solubilizing ability [3]. In contrary, while in extraction and recovery processes, hexane is released into the environment that react with the pollutants to form ozone and photo chemicals

Ithink its solid. hope this