| 摘要 |
<p>Hydrogen peroxide is made electrolytically in a threecompartment cell having an anion-active permselective membrane separating anode and buffer compartments and a cation-active permselective membrane separating the buffer compartment and cathode compartment, by feeding sulfuric acid to the anode compartment, alkali metal sulfate to the buffer compartment and water to the cathode compartment and withdrawing substantially sulfate-free alkali metal hydroxide solution from the cathode compartment and persulfuric acid from the anode compartment, after which the persulfuric acid is hydrolyzed to produce hydrogen peroxide and sulfuric acid. The process is particularly useful for supplying hydrogen peroxide for use in wood pulping or pulp bleaching processes, especially in conjunction with chlorine dioxide bleaching, because alkali metal sulfate resulting from chlorine dioxide manufacture can be used as a reactant in the present process, a portion of the sulfuric acid produced in the present process may be used in the manufacture of chlorine dioxide, and the alkali metal hydroxide produced by the present process is also useful in pulping wood.</p> |
