CONVERSION OF DIVALENT IRON SALT INTO TRIVALENT IRON SALT

摘要

PURPOSE:To efficiently obtain a trivalent iron salt without adding external energy, by interposing a porous carbon layer between an anode using air active substance and a cathode using a divalent iron salt to perform discharge, and applying electrolytic oxidation to the divalent iron salt. CONSTITUTION:Air is supplied to an anode 1 from an air inlet 6. A liquid mixture consisting of ferrous sulfate and sulfuric acid supplied from a cathode active substance supply port 6 is contacted with a cathode 2 and simultaneously penetrated into the electron conductive matrix 3 of a porous carbon layer comprising carbon paper. Whereupon, a current is flowed between both electrodes 1, 2 through the matrix 3 and ferrous sulfate receives electrolytic oxidation at the cathode 2 by discharge to be converted to ferric sulfate which is, in turn, discharged from a cathode reaction product takeout port 9. Ferric sulfate is recirculated if necessary to be concentrated.