Loading patent…
AssigneeE. I. Du Pont de Nemours and Company
InventorsJames A. Trainham, III, Clarence G. Law, Jr., John S. Newman, Kenneth B. Keating, Douglas J. Eames
Estimating the term…
A particular anode comprising an electrochemically active material selected from the group consisting of the oxides of the elements tin, germanium and lead and mixtures comprising at least one of the respective oxides of such elements is useful in an electrochemical cell for the direct production of essentially dry halogen gas from essentially anhydrous halogen halide, or in a process for such production of essentially dry halogen gas. This cell or process may be used to produce halogen gas such as chlorine, bromine, fluorine and iodine from a respective anhydrous hydrogen halide, such as hydrogen chloride, hydrogen bromide, hydrogen fluoride and hydrogen iodide.
A process for the direct production of essentially dry halogen gas from essentially anhydrous hydrogen halide, wherein molecules of essentially anhydrous hydrogen halide are fed to an inlet of an electrochemical cell comprising a cation-transporting membrane, a cathode disposed in contact with one side of the membrane and an anode disposed in contact with the other side of the membrane and are transported to the anode of the cell, the anode and the cathode each comprising an electrochemically active material, wherein the electrochemically active material of the anode is selected from the group consisting of the oxides of the elements tin, germanium and lead and mixtures comprising at least one of the respective oxides of said elements, and further wherein the molecules of the essentially anhydrous hydrogen halide are oxidized at the anode to produce essentially dry halogen gas and protons, the protons are transported through the membrane and the transported protons are reduced at the cathode.
An electrochemical cell for the direct production of essentially dry halogen gas from essentially anhydrous hydrogen halide, comprising:
A process for the direct production of essentially dry halogen gas from essentially anhydrous hydrogen halide, wherein:
A process for recycling unreacted anhydrous hydrogen halide generated from the direct production of essentially dry halogen gas from essentially anhydrous hydrogen halide, wherein:
A process for recycling essentially dry halogen gas to a synthesis process, wherein the essentially dry halogen gas is generated directly from essentially anhydrous hydrogen halide, wherein:
Dependencies are inferred from the claim text.