PROCESS FOR THE REMOVAL OF SULFURIC ACID PRESENT IN ESSENTIALLY ALCOHOLIC SOLUTIONS OF H202 COMING FROM DIRECT SYSTHESIS

摘要

Process for the removal of impurities, in particular sulfu­ric acid, present in solutions of H2O2 coming from direct synthesis starting from hydrogen and oxygen, fed from a re­actor containing a palladium and platinum catalyst, in an alcohol-based liquid reaction medium containing sulfuric acid and a halogen as promoters, which comprises: a) adding to the solution of H2O2 an at least stoichiomet­ric quantity with respect to the sulfuric acid present, of carbonates and/or bicarbonates and/or oxides and/or hydrox­ ides of alkaline and/or alkaline earth metals; b) removing the solid precipitated from the liquid phase.