Process for producing a purified aqueous hydrogen peroxide solution

摘要

The present invention provides a process for producing a high-purity aqueous hydrogen peroxide solution from which metal ion impurities are removed as much as possible by purifying an aqueous hydrogen peroxide solution containing metal ion impurities. Specifically, the invention provides a process for producing a purified aqueous hydrogen peroxide solution comprising contacting an aqueous hydrogen peroxide solution containing metal ion impurities first with a H<+> type cation exchange resin, secondly with a carbonate ion (CO3<2->) type or bicarbonate ion (HCO3<->) type anion exchange resin, and thirdly with a H<+> type cation exchange resin. Further, the invention provides a process for producing a purified aqueous hydrogen peroxide solution further comprising contacting said aqueous hydrogen peroxide solution with a fluoride ion (F<->) type anion exchange resin before contacting with said carbonate ion type or bicarbonate ion type anion exchange resin but after the first contact with said cation exchange resin.