Separation of catalyst-free working liquor from hydrogenation cycle of anthraquinone process to produce hydrogen peroxide

摘要

The present invention relates to a process for separating a catalyst-free use solution from a worrying solution containing palladium black in a hydrogenation cycle of an anthraquinone process to produce hydrogen peroxide.;The problem posed by the present invention is to improve the separation of the chuck-freed liquor from the hydrogenation purification furnace containing Pd black, which has already been carried out using filter candles to reduce process costs.;This problem is solved by using a microfilter operating on a crossflow principle, including a filter membrane of ceramic material, more particularly a-aluminum oxide or polyolefin, having an average pore diameter of 0.1 to 3.0 um. Cross flow speed is generally 0.5 to 5 m / s,