Patent ID: 6368490
Filing Date: 2002-04-09
Classification: C01B,C25B

Abstract:
A method for the electrochemical processing of HCl gas to high-purity chlorine comprisingA) reacting HCl gas in a gas-phase electrolysis stage to give a chlorine gas which contains HCl gas, B) scrubbing the HCl-containing chlorine gas extractively in an absorption stage with depleted liquid hydrochloric acid as an absorbent, thereby forming enriched hydrochloric acid and freeing chlorine gas from the HCl gas, C) converting the enriched hydrochloric acid in a liquid-phase electrolysis stage into chlorine gas, and forming depleted hydrochloric acid, and D) passing the depleted hydrochloric acid back into the absorption stage; wherein chlorine streams generated in the gas-phase electrolysis stage and in the liquid-phase electrolysis stage are drawn off.