PRODUCTION OF POLYSULPHIDE BY ELECTROLYSIS OF WHITE LIQUOR CONTAINING SULPHIDE

摘要

In a method for treating sulphide-containing white liquor in a continuously operating electrolytic cell (1) having separate anode and cathode compartments (2 et 3, respectively) separated by a partially permeable barrier (6), white liquor is introduced into the anode compartment (2) of the cell (1), and an aqueous solution of alkali metal hydroxide is introduced into the cathode compartment (3) of the cell (1), so that sulphide is oxidised in the anode compartment (2), while at the same time alkali metal cations are transported through the barrier (6) into the cathode compartment (3), where water reacts to form hydroxide ions. An electrolytic cell suited for implementing the method is also disclosed.