FIELD: chemistry.
SUBSTANCE: invention relates to a method and device for the production of concentrated sulphuric acid from sulphuric acid by the distillation of the sulphuric acid with dried air. The concentration of sulphuric acid constitutes 90-98 wt %, with the concentration of the concentrated sulphuric acid constituting 95-98.8 wt %. Air is dried in a drier. Sulphuric acid can be formed by cooling and condensation of an effluent gas, which contains water and sulphuric anhydride. Cooling and condensation are carried out in an air refrigerator. In case of an absorption drier application, it can be regenerated by warm air, representing cooling air, transferred from an output device of the air refrigerator.
EFFECT: providing the concentration of sulphuric acid under conditions which are mild for construction materials.
22 cl, 4 dwg, 4 tbl, 4 ex
