Patent ID: 7981391

Claim:
An aqueous hydrogen peroxide solution comprising: (I) less than 50 wppm alkali metals, alkaline earth metals or combinations thereof in total, irrespective whether the alkali metals or alkaline earth metals are present in cationic or complex form; (ii) less than 50 wppm of amines having a pkB of less than 4.5 or the corresponding protonated compounds in total; (iii) at least 100 wppm anions or compounds that can dissociate to form anions in total; and the wppm being based on the weight of hydrogen peroxide; and (iv) at least 100 wppm of bases having a pkB of at least 4.5 or the corresponding protonated compounds in total based on the weight of hydrogen peroxide; wherein the amount of components of group iv) in total is 3000 wppm at most, based on the total weight of hydrogen peroxide, said aqueous hydrogen peroxide solution having been prepared according to anthraquinone loop process.