| 摘要 |
FIELD: inorganic compounds technology. ^ SUBSTANCE: invention provides a method for preparing a concentrated solution such as concentrated hydrogen peroxide aqueous solution comprising distillation and evaporation of dilute solution wherein distillation and evaporation are effected in two separate zones of equipment, which are easy to dismount and transport. Distillation column and evaporator are connected through distribution device, wherein area of cross section in the narrowest point is less than that in distillation column. ^ EFFECT: enabled preparation of aqueous hydrogen peroxide solutions with concentration at least 90%. ^ 7 cl, 1 dwg, 2 ex |
