Patent ID: 8715613

Claim:
A method for producing ultra-clean and high-purity aqueous hydrogen peroxide solution characterized in that the method includes the following steps: industrial grade aqueous hydrogen peroxide solution is filtered by SBA-15 molecular sieves onto which the chelator is loaded and then the said industrial grade aqueous hydrogen peroxide solution is filtered by a hyperfiltration membrane under the pressure of 0.1˜0.15 MPa to obtain the ultra-clean and high-purity aqueous hydrogen peroxide solution; wherein the chelator is cyclopentane-methanoic acid or 1,1-dimethyl propionic acid, or their mixture; and wherein the SBA-15 molecular sieves onto which the chelator is loaded are prepared by the following steps: the SBA-15 molecular sieves are impregnated in the solution of the chelator, then they are filtered, and further cleaned by being soaked in ultra-pure water, and, lastly, dried for 24 hours.