Process for producing hydrogen peroxide

Abstract From the Canadian patent

In the extraction stage of the anthraquinone process for the production of hydrogen peroxide an aqueous hydrogen peroxide extract containing small amounts of process solution and a process solution containing small amounts of dispersed aqueous hydrogen peroxide are obtained. For the after-purification of these solutions the process solution is mixed with aqueous hydrogen peroxide or preferably with water the hydro-, gen peroxide extract preferably with an organic solvent mixture preferably a quinone solvent and the dispersed phase is separated by coalescing devices in a separator unit. It is particularly preferable to add, prior to the coalescing stages, 1 to 3% by volume of water or 1 to 3 …