Process for the enrichment and purification of an aqueous solution of hydrogen peroxide

摘要

The invention relates to a process for the preparation of an aqueous solution enriched and purified with hydrogen peroxide from a crude aqueous solution of hydrogen peroxide. BR/ According to the invention, the crude aqueous evaporated hydrogen peroxide solution is evaporated in an evaporator (24) in vapor with accompanying liquid in the form of a mist, the steam is separated from the mist of liquid in a gas-liquid separator (26) and distilling the vapor in a fractional distillation column (32), by subjecting the crude aqueous solution of hydrogen peroxide, prior to introduction into the evaporator, to a contact treatment with a porous synthetic adsorbent resin to remove organic impurities from the crude aqueous solution of hydrogen peroxide. BR/ The invention is particularly applicable to the production of very pure hydrogen peroxide for the electronics industry. / P