Back to results
US 6,368,490 B1Granted
Method for electrochemically processing HCL gas into highly pure chlorine
AssigneeBayer Aktiengesellschaft
InventorFritz Gestermann
Life of this patent
Estimating the term…
Abstract
A method is described for the electrochemical processing of HCL gas to high-purity chlorine in which the process of an HCL gas-phase electrolysis with purified HCL gas from, for example, chemical reactions is coupled to a hydrochloric acid electrolysis with dilute hydrochloric acid, with the use if desired of a consumable oxygen cathode.
Claims11
A method for the electrochemical processing of HCl gas to high-purity chlorine comprising
- A) 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.
2 more elements
Dependencies are inferred from the claim text.