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US 2021/0277530 A1Published application
New electro-chemical process based on a dimensionless factor
OwnerAlejo Ivan GALLEGOS RIEDEMANN,inventor
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OwnerAlejo Ivan GALLEGOS RIEDEMANN,inventor
Estimating the term…
The invention relates to a new way of reducing dissolved metals, in particular Cu+2 to Cu0, in which the effect of the diffusion-limiting layer is regulated, optimising the variables which determine the mobilisation of the metal ion (Cu+2) towards the cathode and the thermodynamic stability of the reduction reaction of Cu+2 to Cu0 (or metal of interest) on the cathodic surface. The process is carried out by controlling a dimensionless ratio (referred to as t) or the cathodic polarisation, within certain predefined margins, dynamically adjusting concentrations, flows and/or electrical currents to maintain the predefined operating conditions at an optimum level.
A process of electrochemical reduction of Cu+2 and other metals, such as Ni, Ag, As, and Co, which controls migratory, diffusive and convective variables, allowing the extraction of Cu0 from dilute solutions and in the presence of other ions, CHARACTERIZED because it operates maintaining the cathode potential Ec or the recovery within a predefined range. To prevent the Ec from exceeding the limits of a certain range, the flow of cupric ions should be increased or decreased, and the density of the current fed should be decreased or increased. To prevent the from exceeding the limits of a certain range, the flow of cupric ions should increased or decreased, and the density of the current fed should be decreased or increased.
Dependencies are inferred from the claim text.