In this study, we focus on PA 6. PA 6 is one of the polymers with the most resource intensive manufacturing and there-fore its production through recycling methods is highly beneficial . PA 6 can be recycled mechanically, physically, biologically, chemically or thermally . In comparison to other recycling technologies, physical dissolution-precipitation should be less energy-intensive because it only disrupts the hydrogen bonds between the polymer molecules to dissolve the polymer, without the need to break any covalent bonds as in chemical recycling. Therefore, we focus on the selective dissolution of PA 6 as a technique to separate PA 6 from other polymers. Selective dissolution involves dissolving only PA 6 from the mixture, separating the solution from the other polymers and reprecipitating PA 6 from the solvent with the help of an antisolvent, as shown in Figure . Polyamide 6 has been selectively dissolved in phenol and 3-methylphenol , formic acid , ethane-1,2-diol , dimethyl sulfoxide , tributylethyl-phosphonium diethylphosphate ([P 4442 ][Et 2 PO 4 ]) and CaCl 2 -EtOH-H 2 O mixtures (CEW) . Applied antisolvents to precipitate the polymer chains have been toluene , xylene , methanol , dimethylformamide , hexane , butan-2-one , dimethyl sulfoxide , and water .