摘要:
An efficient and low environmental impact method is disclosed for the recovery of lithium from aqueous solution, for example, brines from high altitude salt lakes. The method comprises the use of an electrochemical reactor with electrodes which are highly selective for lithium, where lithium ions are inserted in the crystal structure of manganese oxide in the cathode, and extracted from the crystal structure of manganese oxide in the anode. Also disclosed are three-dimensional carbon electrodes embedded in manganese oxides formed by impregnating a porous support, for example a carbon felt, with a manganese oxide/carbon black slurry.
摘要:
A long-acting composite-basket anode combination device comprising an outer frame for combination, two or more composite-basket anodes that allow feeding in batches, and an insoluble anode plate electrically connected with a power supply and mounted on each of the composite-basket anodes; the two or more composite-basket anodes are fixed on the outer frame for combination through a fixing device, respectively, the composite-basket anode includes a basket body, a plug-in strainer and a large-hole pressing plate; the large-hole pressing plate is fitted on both sides of the basket body and fixing the strainer inside the basket body to form a feed bin with an upper end opening. The present invention combines the soluble anode electrolytic refining principle with the two cathode metal production processes, and thus achieving one-step electrolytic refining.
摘要:
An efficient and low environmental impact method is disclosed for the recovery of lithium from aqueous solution, for example, brines from high altitude salt lakes. The method comprises the use of an electrochemical reactor with electrodes which are highly selective for lithium, where lithium ions are inserted in the crystal structure of manganese oxide in the cathode, and extracted from the crystal structure of manganese oxide in the anode. Also disclosed are three-dimensional carbon electrodes embedded in manganese oxides formed by impregnating a porous support, for example a carbon felt, with a manganese oxide/carbon black slurry.
摘要:
Apparatus and processes are disclosed for electrowinning metal from a fluid stream. A representative apparatus comprises at least one spouted bed reactor wherein each said reactor includes an anolyte chamber comprising an anode and configured for containing an anolyte, a catholyte chamber comprising a current collector and configured for containing a particulate cathode bed and a flowing stream of an electrically conductive metal-containing fluid, and a membrane separating said anolyte chamber and said catholyte chamber, an inlet for an electrically conductive metal-containing fluid stream; and a particle bed churning device configured for spouting particle bed particles in the catholyte chamber independently of the flow of said metal-containing fluid stream. In operation, reduced heavy metals or their oxides are recovered from the cathode particles.
摘要:
The disclosure pertains to an electrochemical reactor (1, 13), in particular but not exclusively for vatting sulphur dye or vat dye as well as to methods of using such a reactor and to uses of such a reactor. The electrochemical reactor comprises at least one liquid compartment (3) in which a multitude of freely suspended granules (14) is enclosed, wherein at least one of the side walls (5) of the compartment is an electrode and an opposite side wall is formed by a separator element (6), typically a membrane (6), wherein there is provided a bottom inlet (7, 9) and a top outlet (8, 10) of the compartment for a liquid catholyte (9) or a liquid anolyte (7), wherein the inlet region as well as the outlet region of the compartment (3) are provided with an upper grid (11′) and a lower grid (11″), the width of the mesh and the positioning of which is chosen such as to allow the liquid catholyte (9) or the liquid anolyte (7) to pass through from bottom to top but to prevent the granules (14) to pass through the grids (11′,11″) to leave the compartment (3), and wherein the upstream flow of the liquid catholyte (9) or of the liquid anolyte (7) can be adjusted so that in operation the multitude of granules (14) is dragged against the upper grid (11′) while the lower grid (11″) is substantially not in contact with the granules (14).
摘要:
One embodiment of the invention includes an electrochemical cell including a proton exchange membrane and a method of treating nanoparticles using the same.
摘要:
An electrolytic cell for the recovery of material as a powder or flakes from a solution, includes a cell cavity for containing the solution, a rotatable electrode in the cavity having a pair of opposite electrode faces, and a counter electrode in spaced and opposing relationship with the respective opposite electrode faces of the rotatable electrode to supply a current through solution in the cavity to permit extraction of the material by electrochemical reaction. A vibrator directs vibrational energy toward the rotatable electrode to dislodge material extracted as a powder or flakes from the solution by an electrochemical reaction.
摘要:
The present invention relates to a device and method for electrolytic deposition of metals on conducting particles. The conducting particles are completely immersed in a liquid and allowed to flow across a particle contacting surface of a cathode support. The particles flow across the surface and into a reservoir. Fresh particles can be introduced onto a first portion of the particle contacting surface, or the particles can be recirculated from the reservoir. The pellet flow field is of uniform or near uniform thickness. Electrical contact is made between the negative pole of a DC power supply and the conducting particles via the support surface, via conducting inserts passing through the support surface, or via other means. An anode mesh is placed above and parallel to the top face of the particle bed such that the mesh does not touch the particle bed but remains a controlled distance from it. The anode mesh is connected to the positive terminal of the dc power supply. If the particles are made from zinc metal, and if the liquid contains dissolved KOH and potassium zincate, then under the influence of an applied electric field, zinc metal will deposit on the moving particles and oxygen will be liberated on the anode mesh. The movement of the particles is sufficient to prevent the cementation of particles that would otherwise occur in a stationary bed of particles. A significant aspect of the present invention is that device does not require a separator between the particle bed and the anode.
摘要:
Zinc metal is deposited from an alkali electrolyte solution onto conductive seed particles in an electrowinning process which yields unusually high current efficiency and low energy consumption.
摘要:
A process for simultaneous electrodissolution and electrowinning of metals from simple sulphide minerals comprises establishing a cell having(i) an anode compartment or compartments containing a suspension of particulate sulphide mineral, the metal content of which is being selectively liberated by an oxidizing environment attributable to the anode;(ii) a cathode compartment or compartments in which the liberated metal values are electrolytically recovered;(iii) one or more ion permeable membranes, impermeable to the particulate solids in the suspension, separating the anode and cathode compartments;(iv) An electrolyte containing anions of soluble salt(s) of the said liberated metal or metals in both anode and cathode compartments;introducing direct electric current into the cell, and recovering metal values from the cathode.