In this study, the recovery efficiency of titanium dioxide (TiO 2), hydrochloric acid (HCl), and organic solvents in titanium white waste acid (TWWA) is investigated via distillation combined with the calcination distillation under vacuum condition at − MPa for 60 min, the recovery of diisobutyl phthalate (DIBP), hexane (C 6 H 14), ethanol (C 2 H 5 OH), and HCl reached up ...