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7338589 |
Process for recovery of gallium
The present invention relates to a process for the recovery of gallium from Bayer process liquors. Bayer process liquor is obtained from alumina industries and contains 450 g/L Na 2 O, 80 g/L Al 2...
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7169285 |
Low temperature refining and formation of refractory metals
A low temperature method for reducing and purifying refractory metals, metal compounds, and semi-metals using a catalyst. Using this invention, TiO 2 can be reduced directly to Ti metal at room...
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7144493 |
Process for the electrochemical decomposition of powders and electrolysis cells suitable therefor
Process for the electrochemical decomposition of precursors in powder form by introducing a powder batch between two electrodes of an electrolysis cell, electrodes being designed to be...
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6958115 |
Low temperature refining and formation of refractory metals
This invention discloses and claims the low temperature reduction and purification of refractory metals, metal compounds, and semi-metals. The reduction is accomplished using non-aqueous ionic...
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6896788 |
Method of producing a higher-purity metal
A method of producing a higher purity metal comprising the step of electrolyzing a coarse metal material by a primary electrolysis to obtain a primary electrodeposited metal, the step of...
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6319483 |
Gallium and/or indium separation and concentration method
It is possible to recover gallium and indium efficiently and at a low cost from solutions containing traces of gallium and indium. In particular, jarosite is produced by performing a specific...
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6221232 |
Electrolytic refining method for gallium and apparatus for use in the method
An electrolytic refining method for gallium by depositing refined gallium on a cathode in an electrolytic solution using a melted raw gallium material as an anode in an electrolytic cell is...
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5676817 |
Process for the production of pure solutions of tungsten and molybdenum
Process for the production of pure tungsten and/or molybdenum solutions from sources, such as alkaline decomposition solutions, which are contaminated with tantalum, niobium, titanium, aluminium,...
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5543031 |
Method for recovering indium by electrowinning and apparatus therefor
In order to recover indium, while preventing generation of chlorine gas, by a direct electrowinning method from a hydrochloric acid solution from which impurities have been removed by various...
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5376239 |
Process for separating electrodeposited metal in electrolytic refining
A process for separating an electrodeposited metal from a cathode plate in electrolytic refining is disclosed. The cathode plate on which the metal is electrodeposited is first held. Then, heated...
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5250158 |
Method for producing vanadium electrolytic solution
A vanadium electrolytic solution containing highly concentrated and dissolved vanadium is produced by a method wherein a vanadium compound selected from the group consisting of ammonium...
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5232559 |
Separation of molybdenum
An organic solution of a soluble molybdenum compound is ammonated with ammonia, ammonium hydroxide and/or an ammonium salt in order to significantly reduce the electrical resistance of the solution...
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5122241 |
Process for the hydrometallurgical treatment of a solution of materials containing gallium
A process of hydrometallurgical treatment of a solution of materials containing gallium and at least one metalloid from Group V of the periodic table of the elements which comprises adding...
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5102512 |
Process for extracting and purifying gallium from bayer liquors
A process for extracting and purifying the gallium contained in an industrial solution of sodium aluminate by fixing the gallium on a stationary phase constituted by porous polystyrene adsorbent...
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4965054 |
Process of extraction of gallium from aqueous solutions thereof
An improved process of extraction of gallium from aqueous solutions thereof to provide for recovery of the gallium in a very pure form, either as the metal or as the hydroxide. The process involves...
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4826579 |
Electrolytic preparation of tin and other metals
Electrolytic processes for the growth of single crystal tin or other elemental crystals, with or without the use of a substrate. Exemplified cubic forms of alpha-tin and tetragonal forms of...
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4666575 |
Method of recovering gallium from scrap containing gallium
Scrap containing gallium and arsenic is treated with chlorine gas to form a crude gallium and arsenic chloride mixture. Arsenic chloride and impurities having a lower boiling point than that of...
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4608136 |
Oxidation of carbonaceous material and electrodeposition of a metal at the cathode of an electrolytic cell
A metal is electrodeposited in a continuous cyclic electrolytic/carbon oxidation process wherein ferrous ion is oxidized at the anode and a metal is deposited at the cathode of an electrolytic...
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4543169 |
Gold recovery process
A method is described for precious metal recovery from acidic precious metal-cyanide solutions by means of a weakly-basic anion-exchange material comprising a polymeric felt incorporating...
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4421615 |
Process for producing metallic gallium
A highly efficient process for producing metallic gallium from a gallium containing alkali aluminate solution circulating in the Bayer process is disclosed. The process comprises subjecting an...
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4405420 |
Catalyzed electrochemical gasification of carbonaceous materials at anode and electrowinning of metals at cathode
The electrochemical gasification reaction of carbonaceous materials by anodic oxidation in an aqueous acidic electrolyte to produce oxides of carbon at the anode and metallic elements at the...
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4368108 |
Process for electrolytic recovery of gallium or gallium and vanadium from alkaline liquors resulting from alumina production
A process for electrolytic recovery of gallium or gallium and vanadium from alkaline liquors resulting from alumina production which comprises electrolysis thereof on solid electrodes at a cathodic...
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4287030 |
Process for producing high-purity indium
A process for producing high-purity indium which comprises vacuum melting of the metal in two stages: in the first stage at a temperature of from 850° to 940° C. for 1-5 hours; in the second...
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4268363 |
Method for electrowinning metals
Electrochemical gasification of carbonaceous materials by anodic oxidation produces oxides of carbon at the anode and hydrogen or metallic elements at the cathode of an electrolysis cell. In...
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4204922 |
Simultaneous electrodissolution and electrowinning of metals from simple sulphides
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...
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4198231 |
Recovery and separation of gadolinium and gallium
Gallium and gadolinium are recovered and separated from scrap material of substances which contain both of these elements in the form of oxides or compounds which can be transformed to the oxides....
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4189358 |
Electrodeposition of ruthenium-iridium alloy
Ruthenium-iridium electrodeposits are prepared from aqueous acid solution containing ruthenium, iridium, a fluoborate salt, fluoboric acid, and optionally sulfamic acid. The baths are especially...
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4152227 |
Method for extraction of gallium from aluminate-alkaline solutions in the production of alumina from aluminum-containing ores
The starting aluminate-alkaline solutions are subjected to two-stage carbonization with stirring and the production of hydrate of aluminum oxide, a gallium-containing precipitate, and solutions...
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4135917 |
Process for recovering gallium from alkali aluminate solutions resulting from treatment of aluminum-containing ores
A process for recovering gallium from alkali aluminate solutions which consists in that the starting alkali aluminate solution is neutralized to a concentration of the caustic alkali of from 0.1 to...
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4094753 |
Recovery of gallium from gallium compounds
A process is described for the recovery of gallium from scrap materials in which the gallium occurs as gallium compounds containing at least one element selected from the group consisting of...
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4071422 |
Process for concentrating and recovering gallium
Gallium and other values are recovered from phosphorus-furnace flue-dust by treating dust with sulfuric acid to form a solution and a residue. The residue may be treated for recovery of values....
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4061551 |
Process for extraction of gallium from alkaline gallium-containing solutions
A process for the extraction of gallium from alkaline gallium-containing solutions comprises electrochemically reducing gallium on liquid metal materials in an alternating electromagnetic field.
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4026771 |
Process for the purification of metals
A method and apparatus to electrochemically purify gallium is disclosed where a platinum anode is inserted into an electrolytic cell which contains the unpurified gallium as an anode and the...
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4012298 |
Process for the electrolytic recovery of gallium and/or alkali metals
A method of electrolytically recovering gallium and/or alkali metals from alkali metal solutions, preferably aluminate (sodium aluminate) liquors from aluminate production in which the gallium or...
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3966568 |
Electrowinning of gallium
A process for producing gallium by electro-deposition from an acidic gallium chloride solution wherein electrolysis is conducted in the presence of metal ions of at least one metal from the group...
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3933604 |
Method of electrolytically extracting gallium from aluminate solutions
A method of recovering gallium from sodium aluminate solutions comprises extracting gallium from aluminate solution by electrolysing the solution with a current density of at least 0.002 A/cm 2 ...
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3932230 |
Method of extracting gallium
A method of removing gallium from tin, lead or tin-lead alloy in which the molten metal containing gallium is treated with a molten flux of alkali metal hydroxide, alkali metal carbonate or a...
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3930969 |
Process for oxidizing metal sulfides to elemental sulfur using activated carbon
Accelerated reaction rates and improved yields are accomplished when sulfides of metals of groups Ib, IIb, IVa, Va and VIII of the Periodic Table are oxidized in aqueous medium to convert the...
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3915818 |
Electrowinning process for the improved recovery of metal
Metal, particularly copper, is extracted simultaneously from both its oxide ores and its sulfide ores and its sulfide ores by an electrowinning operation which is normally used only in conjunction...
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3912801 |
Solvent extraction of metals with a cyclic alkylene carbonate
Cyclic organic carbonates have been found, along with mixtures of same with other organic liquids that are miscible therewith, to extract the following metals in stable complex or simple salt form...
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3904497 |
Process for electrolytic recovery of metallic gallium
Gallium metal is electrolytically extracted from gallium compounds by a process which simultaneously dissolves the compound and reduces the metal.
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3897317 |
Process for making hyperpure gallium
A method for preparing hyperpure metal selected from the group consisting of gallium, germanium and indium comprising the steps of: halogenating one of said metals which contains less than about 2...
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3819231 |
ELECTROCHEMICAL METHOD OF MINING
An in situ electrochemical method for extracting the mineral values from an ore body without greatly disturbing or polluting the ecology of the area. Holes are drilled into the ore body which is...
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3468773 |
METHOD OF OBTAINING METALLIC GALLIUM FROM COMBUSTION GASES RESULTING FROM ANY KIND OF BLACK OR BROWN COAL COMBUSTION
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3423301 |
ELECTROLYTIC PRODUCTION OF HIGH-PURITY GALLIUM
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3325380 |
Method and apparatus for electrolytically producing highly pure gallium
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3325383 |
Method for producing gallium
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3268426 |
Electrolytic process for refining indium
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3256086 |
Method for the recovery of gallium using an alkali metal amalgam
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3180812 |
Process for the manufacture of indium of high purity
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