Abstract:
Embodiments described herein relate to methods of metal extraction from their ores and conversion of ores to metal carbonates for chemical storage of Carbon dioxide in mineral form. In some embodiments, metal alloys are produced directly by co-extraction of metals from a combination of the ores of respective metals in the alloy or from a combination of the oxides of respective metals.
Abstract:
A method for extracting the tantalum from an acid aqueous phase A1 comprising at least one step comprising the bringing of the aqueous phase A1 into contact with a phase A2 not miscible with water, and then the separation of the aqueous phase A1 from the phase A2, the phase A2 consisting of one ionic liquid or a mixture of ionic liquids as an extractant. A method for recovering the tantalum that implements this extraction method and to a use of an ionic liquid or of a mixture of ionic liquids as an extractant, in order to extract the tantalum from such an aqueous phase A1.
Abstract:
A method of recovering metals from electronic waste comprises providing a powder comprising electronic waste in at least a first reactor and a second reactor and providing an electrolyte comprising at least ferric ions in an electrochemical cell in fluid communication with the first reactor and the second reactor. The method further includes contacting the powders within the first reactor and the second reactor with the electrolyte to dissolve at least one base metal from each reactor into the electrolyte and reduce at least some of the ferric ions to ferrous ions. The ferrous ions are oxidized at an anode of the electrochemical cell to regenerate the ferric ions. The powder within the second reactor comprises a higher weight percent of the at least one base metal than the powder in the first reactor. Additional methods of recovering metals from electronic waste are also described, as well as an apparatus of recovering metals from electronic waste.
Abstract:
A method for separating an amount of osmium from a mixture containing the osmium and at least one other additional metal is provided. In particular, method for forming and trapping OsO4 to separate the osmium from a mixture containing the osmium and at least one other additional metal is provided.
Abstract:
A method for separating an amount of osmium from a mixture containing the osmium and at least one other additional metal is provided. In particular, method for forming and trapping OsO4 to separate the osmium from a mixture containing the osmium and at least one other additional metal is provided.
Abstract:
A method for recycling metallic material produced by an electrochemical material removal process. The method includes flowing an electrolyte solution between an anode workpiece and a cathode tool in a first electrolytic process, the first electrolytic process including applying a first electrolytic current and voltage between the anode workpiece and the cathode tool and thereby causing metal ions to be removed from the anode workpiece and dissolved and substantially retained in the electrolyte solution. The electrolyte solution with the metal ions therein is passed between an electrowinning cathode and an electrowinning anode in a second electrolytic process, the second electrolytic process including applying a second electrolytic current and voltage between the electrowinning cathode and the electrowinning anode and thereby causing the metal ions to be removed from the electrolyte solution and deposited onto the electrowinning cathode.
Abstract:
A method for separating an amount of osmium from a mixture containing the osmium and at least one other additional metal is provided. In particular, method for forming and trapping OsO4 to separate the osmium from a mixture containing the osmium and at least one other additional metal is provided.
Abstract:
An electrochemical process for the concurrent recovery of iron metal and chlorine gas from an iron-rich metal chloride solution, comprising electrolysing the iron-rich metal chloride solution in an electrolyser comprising a cathodic compartment equipped with a cathode having a hydrogen overpotential higher than that of iron and containing a catholyte having a pH below about 2, an anodic compartment equipped with an anode and containing an anolyte, and a separator allowing for anion passage, the electrolysing step comprising circulating the iron-rich metal chloride solution in a non-anodic compartment of the electrolyser, thereby causing iron to be electrodeposited at the cathode and chlorine gas to evolve at the anode, and leaving an iron-depleted solution. The iron-rich metal chloride solution may originate from carbo-chlorination wastes, spent acid leaching liquors or pickling liquors.
Abstract:
Methods for producing oxygen from metal oxides bearing minerals, e.g. ilmenite, the process including producing a slurry of the minerals and hot sulfuric acid, the acid and minerals reacting to form sulfates of the metal, adding water to the slurry to dissolve the minerals into an aqueous solution, separating the first aqueous solution from unreacted minerals from the slurry, and electrolyzing the aqueous solution to produce the metal and oxygen; and in one aspect, a process for producing a slurry with ferrous sulfate therein by reacting ilmenite and hot sulfuric acid, adding water to the slurry to dissolve the ferrous sulfate into an aqueous solution, separating the aqueous solution from the slurry, and electrolyzing the aqueous solution to produce iron and oxygen. In one aspect, these process are suitable for producing oxygen in outer space, e.g. on the moon or Mars.
Abstract:
This invention relates to a process for recovery of waste H.sub.2 SO.sub.4 and HCl which are used for pickling metallic materials and articles and contain a large quantities of Fe ions. Furthermore, it offers a process for the recovery of H.sub.2 SO.sub.4 and HCl from waste H.sub.2 SO.sub.4 which contains large amounts of Fe ions after removal of Ti ions by a hydrolysis process in the production of TiO.sub.2 and also for the recovery of high-purity electrolytic iron or iron hydroxide.