Ukukhiqizwa kwe-oksijini ye-cryogenic & nenqubo yokukhiqiza i-oxygen & nitrogen yethula inqubo yokucindezela okuphansi emishini yokuhlukanisa umoya, okunciphisa ukusetshenziswa kwamandla kokuhlukaniswa komoya futhi kuthuthukisa ukuphepha kokusebenza.Isofthiwe yamakhemikhali ehambisanayo isetshenziswa ekubalweni kwenqubo kanye nokwakhiwa kwemishini yeyunithi yenqubo yokubala ukukhishwa kwe-distillation kanye nokubalwa kwesakhiwo ukuze kuqinisekiswe imishini ethuthukisiwe nethembekile.