Electrochemical conversion of anhydrous hydrogen halide to halogen gas using an electrochemical cell
AssigneeE. I. Du Pont de Nemours and Company
InventorsWilliam H. Zimmerman, James Arthur Trainham, Clarence Garlan Law, Jr., John Scott Newman
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Abstract
The present invention relates to an electrochemical cell and a process for converting anhydrous hydrogen halide to halogen gas using a membrane-electrode assembly (MEA) or a separate membrane and electrode arrangement, such as gas diffusion electrodes with a membrane.
Claims24
An electrochemical cell for the direct production of essentially anhydrous hydrogen halide to essentially dry halogen gas comprising a membrane electrode assembly, wherein the membrane electrode assembly includes:
- (a) means for oxidizing molecules of essentially anhydrous hydrogen halide to produce essentially dry halogen gas and protons;
- (b) cation-transporting means for transporting the protons therethrough, wherein the oxidizing means is disposed in contact with one side of the cation-transporting means;
- and
- (c) means for reducing the transported protons disposed in contact with the other side of the cation-transporting means, wherein the oxidizing means and the reducing means comprises particles of an electrochemically active material applied to the cation-transporting means.
An electrochemical cell for the direct production of essentially dry halogen gas from essentially anhydrous hydrogen halide, comprising:
- (a) means for oxidizing molecules of essentially anhydrous hydrogen halide to produce essentially dry halogen gas and protons;
- (b) proton-transporting means for transporting the protons therethrough, wherein the oxidizing means is disposed in contact with one side of the proton-transporting means and the proton-transporting means is a membrane comprising a copolymer of at least two monomers, and at least one of the monomers has a pendant sulfonic acid group;
- and
- (c) means for reducing the transported protons, wherein the reducing means is disposed in contact with the other side of the proton-transporting means.
Dependencies are inferred from the claim text.