METHOD OF CONCENTRATING AQUEOUS HYDROGEN PEROXIDE SOLUTION Russian patent published in 2015 - IPC C01B15/13 B01D3/00 

FIELD: chemistry.

SUBSTANCE: method is carried out in a device which includes a preliminary evaporating apparatus, a distillation column and a secondary steam compressor. The aqueous hydrogen peroxide solution to be concentrated is continuously fed into the preliminary evaporating apparatus. The secondary steam generated in the preliminary evaporating apparatus by evaporation is fed into a distillation column. The bottom product obtained in the preliminary evaporating apparatus is collected in the form of a first concentrated hydrogen peroxide stream. The secondary steam generated in the distillation column is collected into the top part of the column, compressed in a secondary steam compressor and used to heat the preliminary evaporating apparatus, and the bottom product obtained in the distillation column is collected in the form of a secondary concentrated stream of hydrogen peroxide. Part of the bottom product obtained in the preliminary evaporating apparatus is fed into the distillation column in liquid state.

EFFECT: invention enables to simultaneously produce two concentrated aqueous solutions of hydrogen peroxide with different concentration in a freely selected ratio.

10 cl, 2 dwg