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US 5,055,286 AGranted
Process for preparing high purity hydrogen peroxide
AssigneeTokai Denka Kogyo Kabushiki Kaisha
InventorsSatoru Watanabe, Osami Ohura
Life of this patent
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Abstract
Metal ions contained in hydrogen peroxide can be removed efficiently, safely and inexpensively by contacting hydrogen peroxide to be purified with an anion exchange resin with a chelating agent adsorbed therein.
Claims4
A process for purifying hydrogen peroxide, characterized by contacting hydrogen peroxide with an anion exchange resin;
- said resin having a chelating agent absorbed therein, wherein said contacting comprises passing said hydrogen peroxide through said resin having said chelating agent adsorbed therein;
- wherein said chelating agent contains in the molecule thereof at least three acid groups and wherein said acid groups are carboxyl groups or phosphonic acid groups.
Dependencies are inferred from the claim text.