“…Consequently, separation of this acid from aqueous solutions is an economically and environmentally crucial issue. In the earliest investigations, several authors have reported many LLE data on systems containing water, PA, and organic solvents from different chemical categories. − Subsequently, important studies have been carried out on the acid extraction from water and LLE measurements by several researchers. − Mainly, hydrocarbons and halogenated hydrocarbon, − ketones, − heavy alcohols, − esters and dibasic esters, − nitriles, , and ethers have been examined for the LLE measurements. In the latest investigations, Özmen and co-worker have reported further equilibrium data for the related PA containing systems.…”