METHOD FOR PURIFYING AQUEOUS HYDROGEN PEROXIDE CONTAINING IMPURITIES

• Main Authors: DEMAY DIDIER, DEVOS CHRISTINE
• Format: Patent
• Language: English
• Published: 09.05.2000
• Edition: 7
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a method for purifying a hydrogen peroxide aq. solution containing impurities. SOLUTION: This method for purifying the hydrogen peroxide solution containing the impurities, a part of which is in ionic state, is by passing the aq. solution through at least one kind of a 1st anion type resin to remove an anionic impurity and next, through a cation type 2nd resin to remove at least a part of a cationic impurity or vice-versa to purify. At least a 1st bed and a 2nd bed of the anion type 1st resin are arranged in parallel and the aq. solution is sent alternately to the 1st bed or the 2nd bed and the switch from 1st bed to the 2nd bed (or vice-versa) is executed when the 1st bed is at least partially saturated with at least one kind of anion constituting the anionic impurity.