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7189380 |
Extraction of metals with diquaternary amines
Selective extraction of one or more metal anions from an aqueous solution, by contacting the aqueous solution with an organic solution including a diquaternary amine, wherein the diquaternary amine...
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7166144 |
Interlaced series parallel configuration for metal solvent extraction plants
An interlaced series parallel configuration for the extraction of metal values from an metal value containing aqueous is a special series parallel configuration wherein the stripped organic is...
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6958308 |
Deposition of dispersed metal particles onto substrates using supercritical fluids
A method for producing dispersed metal particles on a substrate and the compositions produced is disclosed. A method for producing the particles comprises exposing an organometallic and a...
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6953120 |
Method of recovering metal and/or oxide thereof in a slurry and tailings obtained from said method
A method of recovering metal and/or oxide thereof from a slurry is described. The method involves magnetically separating at least a portion of any magnetic impurities from the slurry and then...
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6951960 |
Method for removing impurities from solvent extraction solutions
A method for regenerating an amine extractant used for recovery of metals involves contacting a liquid organic phase containing an amine complexed with one or more metals with an aqueous solution...
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6632264 |
Gold recovery from thiosulfate leaching
Processes for recovering gold from copper-gold ores thiosulfate leaching or gold ores copper catalyzed thiosulfate leaching using ion exchange technology are disclosed. The processes include...
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6558448 |
Photobiomolecular metallic particles and films
The method of the invention is based on the unique electron-carrying function of a photocatalytic unit such as the photosynthesis system I (PSI) reaction center of the protein-chlorophyll complex...
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6455594 |
Method for producing platinum colloid, and platinum colloid produced by the same
A platinum colloid is formed by reducing platinum ions by agitating a treatment solution, while controlling temperature of the treatment solution under a reductive atmospheric condition. The...
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6428597 |
Heap leach agglomeration/percolation extraction aids for enhanced gold and silver recovery
Methods and compositions for increasing the recovery of precious metals from ore during heap leaching operations are disclosed. The methods add polypropylene glycol and alkylphenol ethoxylate in a...
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6395062 |
Process for recovery of metals from metal-containing ores
Use of a mixture of a C9 alkylsalicylaldoxime and a ketoxime as an extractant in a water-immiscible organic solvent solution in a metal extraction circuit to enhance the transfer of iron values to...
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6264720 |
Separation of heavy metals and materials for use in this
The present invention concerns a composition and method for separating heavy metals from contaminated substrates with compositions containing active agent selected from the group consisting of...
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6203925 |
Porous metal and method of preparation thereof
A method of preparing a porous metal comprises reducing a mixture comprising (I) a source of metal; (II) a solvent such as water; and (III) a structure-directing agent such as octaethylene glycol...
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6179899 |
Preparation of fine aluminum powders by solution methods
Fine aluminum powders are prepared by decomposing alane-adducts in organic solvents under an inert atmosphere to provide highly uniform particles and believed particularly effective as fuels and...
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RE36990 |
Chemical process for the recovery of metal from an organic complex
A method for the recovery of a metal from an organic complex thereof, said method comprising treating the complex with a weakly acid aqueous solution of an alkali metal, an alkaline earth metal or...
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6132491 |
Method and apparatus for dissociating metals from metal compounds extracted into supercritical fluids
A method for dissociating metal-ligand complexes in a supercritical fluid by treating the metal-ligand complex with heat and/or reducing or oxidizing agents is described. Once the metal-ligand...
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6077329 |
Selection of size of aluminum particles prepared by solution method
Fine aluminum powders are prepared by decomposing alane-adducts in organic olvents under an inert atmosphere to provide highly uniform particles and believed particularly effective as fuels and...
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RE36118 |
Chemical process of separating metals from an organic complex
A method for the recovery of a metal from an organic complex thereof, said method comprising treating the complex with a weakly acid aqueous solution of an alkali metal or alkaline earth metal...
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5759410 |
Process for recovering mercapto-s-triazines from silver precipitate
There is provided a process for converting a silver-mercapto-s-triazine precipitate to a solid containing silver and a solution containing mercapto-s-triazine by contacting the...
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5695645 |
Methods for removing silver from spent photoprocessing solution
Spent solutions from photographic processors are fed into a conduit (18) to which subsequently are added precipitating agents from a first source (22) and flocculating agents from a second source...
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5484470 |
Enhancement of gold lixiviation using nitrogen and sulfur heterocyclic aromatic compounds
An improved process for dissolving gold metal in ligand and oxidant lixiviation systems, wherein the solubility of gold is enhanced by the addition of heterocyclic aromatic compounds containing...
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5478376 |
Method for the separation of rhodium and/or iridium from solution
A method for the separation of rhodium and/or iridium from a solution containing ruthenium said method comprising the steps of having a rhodium chloride complex in oxidation state III, converting...
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5453297 |
Process for producing finely divided metals deposited on oxidized metals
A process for producing finely divided 20 to 500 angstrom metal particles, metals with oxide coatings or metal oxides using an alkalide or electride in a non-reactive solvent is described. The...
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5447552 |
Process for the extraction and separation of nickel and/or cobalt
The invention provides a hydrometallurgical process for the recovery of metals. In particular, an aqueous feed solution originating from acid leaching is provided. The aqueous feed solution...
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5433855 |
Process for extracting metal values from aqueous solution
A process for extracting metal values especially zinc values from aqueous solutions of metal salts which comprises contacting the aqueous solution with an organic phase comprising a compound of the...
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5429660 |
Method for the recovery of gold value
An efficient method is proposed for the recovery of gold value contained in an aqueous solution even in a very low concentration of the ppb level. Namely, an aqueous acidic solution containing gold...
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5419834 |
Precipitating agent for the precipitation of heavy metals
A precipitating agent containing thioacetamide is described for the precipitating of heavy metals from flue gases and waste waters, it containing thioacetamide (C 2 H 5 SN) in a 1-20% aqueous...
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5393892 |
Processes for removing, separating and concentrating lead, thallium, alkali metals, alkaline earth metals from concentrated matrices using macrocyclic polyether cryptand ligands bonded to inorganic supports
A method for the removal, separation, and concentration of alkali metal, alkaline earth metal, Pb and/or Tl cations from a source solution which may contain larger concentrations of other ions...
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5389124 |
Method for the recovery of gold value
An efficient method is proposed for the recovery of gold value from a waste material containing scrap gold by utilizing a principle that metallic gold can be dissolved at elevated temperatures and...
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5342430 |
Passivation of methylchlorosilane fines
A process for the passivation of fine particulate matter exiting a reactor train for the manufacture of organohalosilanes comprising treating the particulate matter or fines with an aqueous medium...
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5256188 |
Process for the separation of rhodium from organic solutions
A process for the separation of rhodium from rhodium containing organic solutions, organic-aqueous mixtures or aqueous solutions containing complexing agents is disclosed. Metallic bismuth, bismuth...
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5250101 |
Process for the production of fine powder
A process for the production of a fine powder suitable for use in the fields of electronic materials, catalysts, powder metallurgy, pigments and adsorbens. The powder has a primary particle...
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5228903 |
Method for stripping metals in solvent extraction
Aqueous solutions containing metal cations, that may include cations of both desired metal and impurity or secondary metal, are treated with an organic liquid extractant suitable for the extraction...
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5221525 |
Solvent extraction of gallium from acidic solutions containing phosphorus
A process for extracting gallium from an aqueous gallium-bearing acidic solution comprises: a) providing a quantity of phosphorus within the aqueous gallium-bearing solution, the phosphorus being...
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5139752 |
Method for extraction of gold and silver from ore with a solution containing a halogen, halogenated salt and organic solvent
From an ore containing gold and silver, the gold and silver are extracted by a method which comprises pulverizing the ore and bringing the pulverized ore into contact with an elemental halogen, a...
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5131943 |
Process for the separation of precious group VIII a metals from cyano complexes of such metals and other metals
A mixture of cyanide complexes with certain Group VIII metals and other metals is passed in contact with solid subdivided cross-linked polyvinylpyrrolidone whereby the Group VIII metals--platinum,...
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5114473 |
Transition metal recovery
A method for recovering a transition metal such as rhodium from a polar or non-polar liquid by contacting said transition metal-containing liquid with an ion-exchange resin having bonded ionically...
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5093090 |
Process for separating antimony from acidic solutions containing same with an organic diluent containing a polyol
There is disclosed a method for the separation of antimony from acidic solutions which contain antimony, alone, or together with other metallic ions, by extracting antimony with an organic,...
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5089049 |
Passivation of pyrophoric metals
The present invention provides a process for the passivation of pyrophoric metals and especially of magnesium by coating with a passivation agent, wherein, as passivation agent, there is used 0.5...
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5078978 |
Pyridine-containing alkoxysilanes bonded to inorganic supports and processes of using the same for removing and concentrating desired ions from solutions
A method is disclosed for the quantitative removal and concentration of desired transition metal ions from a source solution which may contain larger concentrations of other metal and H + ions....
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5068094 |
Process for the removal of cadmium ions from phosphoric acid resulting from a wet process
A process for the removal of cadmium ions by liquid-liquid extraction from wet process phosphoric acid, which had been obtained from crude phosphate ores by dissolution with sulfuric acid, uses...
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5045290 |
Recovery of pure platinum and palladium
A process for recovery of platinum and palladium from an impure substantially gold-free precious and base metal-bearing acidic chloride or mixed chloride/sulphate solution comprises the steps of:...
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5039496 |
Process for selective extraction of contaminant elements from mixtures of electrolytes in solution
Prior art processes for removal of one or more contaminant elements, including at least one of antimony, bismuth, and arsenic and optionally including iron, from electrolyte solutions of primary...
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5028403 |
Metal recovery with monothiophosphinic acids
Metals selected from the group consisting of zinc (II), cadmium (II), nickel (II), cobalt (II), manganese (II), iron (III) and copper (II) from aqueous solutions containing the same are extracted...
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5028259 |
Recovery of precious metal
An improved process for recovery for precious metals such as gold and silver from aqueous cyanide solutions by contact with certain guanidine reagents. The guanidine reagents not only extract the...
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4992207 |
Composition for extraction of metal ions and oxanions
The present invention relates to a method for the selective extraction of the metals gold, silver, platinum or mercury ions or colloidal gold, from an aqueous solution containing at least one of...
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4992179 |
Metal recovery
A relatively solid, stable biomass reaction product is provided produced from microorganisms having metal uptake properties when contacted by an aqueous solution containing metal cations. The...
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4979986 |
Rapid oxidation process of carbonaceous and pyritic gold-bearing ores by chlorination
A method of treating a gold-bearing ore to render the gold component of the ore more amenable to standard cyanidation treatment in a reduced amount of time is disclosed. An aqueous slurry of the...
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4936910 |
Process for the recovery of gold
Process for recovering gold from a leachate containing AuBr 4 - - comprising contacting the leachate with a quantity of sphagnum peat moss under conditions effective to concentrate the gold on the...
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4929274 |
Recovery of metal values from ores
Heap leaching of gold/silver ores with an aqueous alkali cyanide solution containing a surfactant hydrolyzable at the pH of the solution, the surfactant being present in an amount sufficient to...
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4878945 |
Hydrometallurgical process for treating refractory ores containing precious metals
This invention is directed to an improved process for leach treating gold and silver bearing pyritic and arsenopyritic concentrates and ores. More particularly, the improved process avoids the...
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