6 Pharmaceutical intermediate high purity toluene production plant Abstract 5 Pharmaceutical intermediate high purity toluene production plant, including : tank (F102), tank (F103), stirring reactor (DI01), distillation column (ElOl), tank (F101), pump (J101), pump (J102), ultra-clean filter (L1O); among them, pump (J102) is connected respectively to tank (F102) and stirring reactor (D101), tank (F103) is connected respectively to distillation column (ElOl) and ultra-clean filter (L1O); 10 among them, cylinder diameter of tank (F103) is 700-800 mm. Figure 1 1/1 Heating steam from the heating station Concentrated sulfuric acid F103 F101 J101 Toluene L101 F102 J102 D101 product A E101 eating steam back to the heating station Figure 1