Process for the aqueous purification of hydrogen peroxide containing impurities

Process for purifying an aqueous hydrogen peroxide solution containing impurities, some of which are in ionic form, comprising:

• passing said solution (i) through at least one first, anionic resin to remove at least some anionic impurities, and then through a second, cationic resin in order to remove at least some cationic impurities, or (ii) through at least one first, cationic resin to remove at least some cationic impurities, and then through a second, anionic resin to remove at least some cationic impurities, wherein at least a first and a second bed of the anionic resin are arranged in parallel, wherein the aqueous solution is directed alternately to said first or said second bed, and changeover from the first bed to the second bed or from the second bed to the first bed is carried out when the resin contained in the first bed or the second bed, respectively, is at least partially exchanged with at least one of the anions constituting the anionic impurities, and wherein at least one of the beds of at least one of the resins is provided with safety means capable of triggering a rinsing of at least one of the beds when an anomaly is detected in the progress of at least one process step, wherein the anomaly is based on one or more of hydrogen peroxide solution flow rate, hydrogen peroxide solution temperature, abnormal functioning of a utility service, and actuation of an emergency switch.