摘要:
The present disclosure is a system and method for producing a first product from a first region of an electrochemical cell having a cathode and a second product from a second region of the electrochemical cell having an anode. The method may include the step of contacting the first region of the electrochemical cell with a catholyte comprising an alcohol and carbon dioxide. Another step of the method may include contacting the second region of the electrochemical cell with an anolyte comprising the alcohol. Further, the method may include a step of applying an electrical potential between the anode and the cathode sufficient to produce a first product recoverable from the first region and a second product recoverable from the second region.
摘要:
The invention relates to a salt solution electrodialysis cell for production of the relevant acids and bases by means of a process with reduced or nil consumption of electrical energy. The cell comprises an anodic chamber fed with hydrogen and a cathodic chamber fed with oxygen or air, provided with the relevant gas-diffusion electrodes; the driving power of the electrodialysis process is given by the oxidation and reduction chemical potentials of hydrogen and oxygen fed to the two chambers.
摘要:
An electrochemical process for the recovery of metallic iron or an iron-rich alloy, oxygen and sulfuric acid from iron-rich metal sulfate wastes is described. Broadly, the electrochemical process comprises providing an iron-rich metal sulfate solution; electrolyzing the iron-rich metal sulfate solution in an electrolyzer comprising a cathodic compartment equipped with a cathode having a hydrogen over-potential equal or higher than that of iron and containing a catholyte having a pH below about 6.0; an anodic compartment equipped with an anode and containing an anolyte; and a separator allowing for anion passage; and recovering electrodeposited iron or iron-rich alloy, sulfuric acid and oxygen gas. Electrolyzing the iron-rich metal sulfate solution causes iron or an iron-rich alloy to be electrodeposited at the cathode, nascent oxygen gas to evolve at the anode, sulfuric acid to accumulate in the anodic compartment and an iron depleted solution to be produced.
摘要:
L'invention concerne un procédé de préparation de ClO 2 comprenant :
a) Une préparation d'acide par électrochimie dans une première zone (2) à cathode (3) présente dans un compartiment cathodique (3), à anode (5) présente dans un compartiment anodique (29), et à séparateur hydraulique (4), ne présentant aucune sélectivité ionique, en un seul passage dans le compartiment anodique (29), comprenant au moins une alimentation dans le compartiment anodique (29) d'eau et de sel spectateur, et permettant l'obtention d'un effluent anodique (9) comprenant H + et O 2 gazeux, b) Une séparation (12) gaz-liquide de l'effluent anodique (9), permettant l'obtention en continu d'un effluent anodique (15) comprenant H + et exempt d'O 2 gazeux, c) Une préparation de ClO 2 par voie chimique dans une seconde zone (13), à partir de l'effluent anodique (15) de l'étape b) et d'une solution (16) comprenant ClO 2 - .
Dispositif (1) destiné à être utilisé dans un tel procédé.
摘要:
An electrolytic cell of horizontal type constructed such that the electrolytic cell proper is divided horizontally by one or two ion exchange membranes. If one ion exchange membrane is used, the cell is divided into a cathode and an anode compartment holding a gas electrode. If two ion exchange membranes are used, the cell is divided into a cathode compartment (14), an intermediate compartment (15), and an anode compartment (16). This arrangement permits the gas electrode (23) and the current collector (22) to be in contact with each other under a uniform pressure, and also allows for smooth gas discharge. This leads to a reduction in the electrolytic potential of the cell.