METHOD FOR PRODUCING POLYSULFIDE BY USE OF ELECTROLYTIC OXIDATION

摘要

A method for producing polysulfides which comprises introducing a sulfide io n- containing solution into an anode compartment of an electrolytic bath comprising an anode compartment having a porous anode, a cathode compartment having a cathode, and a diaphragm partitioning the anode compartment and the cathode compartment and effecting an electrolytic oxidation, to thereby produce polysulfide ions, characterized in that the porous anode is arranged in a manner such that an interstice is present between the porous anode and the diaphragm at least in a part of the diaphragm and an apparent volume of the porous anode is 60 % to 99 % relative to that of the anode compartment. The method can be used for producing a digesting solution having a high content of polysufide-sulfur, with markedly reduced by-production of a thiosulfate ion.