Process for producing a purified aqueous hydrogen peroxide solution

摘要

The present invention provides a process for producing a highly purified aqueous hydrogen peroxide solution from which silicon oxide impurities are removed to a minimum by purifying an aqueous hydrogen peroxide solution containing silicon oxide impurities. <??>The present invention comprises a process for producing a purified aqueous hydrogen peroxide solution by removing silicon oxide impurities contained in an aqueous hydrogen peroxide solution, which comprises: adding a flocculating agent to an aqueous hydrogen peroxide solution containing silicon oxide impurities, and filtering out impurities of solid content contained in the aqueous hydrogen peroxide solution with a precision filter, thereafter bringing the aqueous hydrogen peroxide solution obtained as above into contact with an anion exchange resin in a fluoride ion form by at least one fluoride compound which contains 0.05 % by weight or less of SiF6 and is selected from the group consisting of sodium fluoride, potassium fluoride and ammonium fluoride.