Purifying aqueous hydrogen peroxide solutions on ion-exchanging resins
OwnerChristine Devos, Sandrine Dufrenne Moutininventors
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Abstract
The invention relates to a method of purifying an aqueous hydrogen peroxide solution by passing the solution over a cationic resin. The invention consists in passing it over the cationic resin under conditions in which the hydrogen peroxide solution is maintained at a temperature of between its freezing point and +10° C., advantageously between 0° C. and +5° C., so as to limit contamination of the solution by sulphate ions.
Claims8
Method of purifying an aqueous hydrogen peroxide solution, which comprises passing the solution over at least one cationic resin, characterized in that, for the purpose of limiting the contamination of the solution by sulphate ions, it is passed over the cationic resin under conditions in which the solution is maintained at a temperature of between its freezing point and +10° C., advantageously of between 0° C. and +5° C.
Dependencies are inferred from the claim text.