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Hydrogen peroxide can be separated from the working solution by different methods, but those most generally used
involve extraction with water. The hydrogen peroxide in the working solution has a concentration
between 0.8 and 1.9%w/w
and efficient extractors can recover more than 95%. The concentration of hydrogen peroxide in this crude product is between 25 and 45%, and further steps are required to meet commercialgrades for purity and concentration.

Hydrogen Peroxide Synthesis: An Outlook beyond the Anthraquinone Process
Jose M. Campos-Martin, Gema Blanco-Brieva, and Jose L. G. Fierro*
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