METHOD AND ELECTROCATALYST FOR MAKING CHLORINE DIOXIDE

摘要

This invention is directed to an electrocatalytic process for making chlorine dioxide from a strong acid and a metal chlorate solution wherein the catalyst comprises a platinum group metal oxide mixture selected from the following metal combinations: ruthenium and rhodium; ruthenium and palladium; iridium and rhodium; iridium and platinum; rhodium and palladium; and ruthenium, rhodium and palladium, each constituent of said mixture being present in a mole ratio of not less than 0.01. The combined feedstock contains sulphuric acid or phosphoric acid and a chlorate of an alkali metal or alkaline earth metal.