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7571814 |
Method for separating metal values by exposing to microwave/millimeter wave energy
Methods and apparatuses for separating metal values, such as nickel and nickel compounds, from mineral ores, including lateritic ores are disclosed. The method includes providing a mixture of...
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7157062 |
Inhibition of the depletion of metal values from pregnant lixiviant solutions
Methods for inhibiting depletion of mineral values from pregnant lixiviant solutions comprise contacting the requisite metal ore with a preg-robbing inhibition agent (PRIA) comprising (I) alkyl...
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7091525 |
Apparatus for producing a display unit
A display device is formed by burying at least part of a light emitting device in an insulating material, wherein a drive electrode for the light emitting device is formed so as to be extracted on...
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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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6923328 |
Method and apparatus for separating metal values
Methods and apparatuses for separating metal values, such as nickel and nickel compounds, from mineral ores, including lateritic ores are disclosed. The method includes providing a mixture of...
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6569358 |
Method for incorporating metal nanoparticles in porous materials
The method of preparing the porous material incorporating ultrafine metal particles comprises the following steps: (1) preparing surface-protected ultrafine metal particles by reducing metal ions...
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6238632 |
Process and composition for removing precious metals from activated carbon
A process for removing precious metals from activated carbon. The activated carbon is contacted with an aqueous solution of methyl ethyl ketoxime and sodium hydroxide.
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6228334 |
Method of recovering gold from the fine carbon residue from a coarse carbon gold recovery process
A method for recovering gold from gold-loaded fine carbon residue from a coarse carbon gold recovery process is disclosed. The gold-loaded fine carbon residue is mixed with activated coarse carbon...
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5769925 |
Process for the elution of precious metals absorbed on active carbon
A powerful reducing agent such as hydrazine monohydrate is added to the standard eluent solutions such as NsOH-NaCN with or without alcohol. The kinetics of elution of gold or of silver are thus...
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5734020 |
Production and use of magnetic porous inorganic materials
Magnetic porous inorganic siliceous materials having a particle size of about 1 to about 200 microns useful as solid supports in various chromatography, immunoassays, synthesis and other separation...
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5531903 |
Fluoride removal from metal sulphate solution and a method of waste utilization
A process is provided for the removal of fluoride from a metal sulphate solution, such as a zinc sulphate solution, which presents an option for the disposal of waste treatment sludge from the...
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5468456 |
Batch extracting process using magneticparticle held solvents
A process for selectively removing metal values which may include catalytic values from a mixture containing same, wherein a magnetic particle is contacted with a liquid solvent which selectively...
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5449396 |
Method for recovering gold and silver from ore starting materials
A pulp with ph=9.5 to 11.5, resin, and cyanide KCN is fed to a reaction zone. KCN is in a concentration of CN - ions in the liquid phase of the pulp from about 0.1 to about 10 g/l, which is...
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5320720 |
Extraction of precious metals from ores thereof
Increased efficiency of extraction of silver and gold from ore materials thereof containing active carbonaceous material is obtained by conducting the extraction in two stages. In a first stage a...
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5171559 |
Process for purifying silver nitrate solution using activated alumina
A process for removing heavy metals from a silver nitrate solution is disclosed. The process comprises the step of bringing said silver nitrate solution into contact with activated alumina having a...
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5116415 |
Metal value recovery or removal from aqueous media
Hydrophilic hydrogels capable of a high degree of water imbibition are contacted with aqueous feedstocks containing metal and metal anion values to collect the water and dissolved or suspended...
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5084430 |
Sulfur and nitrogen containing hydrocarbons and process of using same in separating desired ions from solutions thereof
Compositions of matter are disclosed comprising nitrogen containing hydrocarbons which are modified with at least one of the elements selected from the group consisting of sulfur, phosphorus an...
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5071819 |
Sulfur and nitrogen-containing hydrocarbons and process of using same in recovering and concentrating desired ions from solutions thereof
The invention has compositions of matter and process aspects. The compositions of matter aspects relate to a class of new organic compounds, viz., intermediates which are sulfur and nitrogen...
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5055199 |
Method for reducing the amount of anionic metal-ligand complex in a solution
A method for reducing the amount of anionic metal-ligand complex in a solution comprises: (a) contacting the solution with a substance selected from: a compound having the formula: A w B x (OH) y...
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5055402 |
Removal of metal ions with immobilized metal ion-binding microorganisms
A composition for removing metal ions from aqueous solution is prepared by immobilizing metal ion-binding microorganisms such as algae, washing the immobilized microorganisms, drying the washed...
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5019162 |
Activated carbon for recovery of gold
There is disclosed an activated carbon for use in the process of recovery of gold which comprises adsorbing aurocyanide complexes thereon, desorbing the complexews therefrom and separating the...
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5015560 |
Method of treating photographic waste
A method of treating a waste solution resulting from the processing of a photographic material with a working solution is disclosed, wherein at least part of said waste solution is absorbed by a...
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4981598 |
Metal sorption method using interstage screening
A method for sorbing metal values from a slurry containing the same is disclosed. The slurry is advanced through a plurality of vessels arranged in series while countercurrently directing a sorbent...
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4968346 |
Method for eluting adsorbed gold from carbon
Gold in a very dilute water solution is carbon filtered to capture the gold by adsorption; the gold in the filter is then recovered from the carbon by means of a highly-efficient non-explosive...
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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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4925485 |
Process for the isolation of noble metals
The present invention involves the isolation or leaching of noble metals from materials containing noble metals, e.g. ores, by treating the noble metal- containing materials with a cyclic thiourea...
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4923510 |
Treatment of refractory carbonaceous sulfide ores for gold recovery
Refractory carbonaceous sulfide ores are treated in a manner so as to improve gold recovery by a treatment in specific combination of steps whereby the ore is treated with chlorine after...
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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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4842644 |
Silver recovery method
Methods of and apparatus for recovering silver and other metals from solutions containing compounds of those metals. The solution being treated is pumped upwardly under pressure and at a constant...
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4802920 |
Extraction of metals from aqueous solutions with asphaltenes
A process for extracting metals from aqueous solutions containing such metals comprising contacting such an aqueous solution with an asphaltene to extract at least one metal from the aqueous...
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4759934 |
Process for preparing high protein bread with ascorbic acid and product
A technique for producing baked products, such as bread with very high protein levels, up to about 45% on a dry basis (18 to 25% on a wet basis), by incorporating in the unrisen dough the desired...
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4726895 |
Process for concentration of gold and uranium magnetically
A process for concentrating gold and/or uranium minerals by rendering the nonmagnetic minerals magnetic or weakly magnetic by causing a coating to form on the surfaces of the minerals. The gold...
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4720422 |
Material for collecting radionuclides and heavy metals
A material is, herein disclosed for collecting radionuclides and heavy metals that comprises an acrylic fiber element having MnO 2 and/or ferrocyanide compound of the formula K 2 M II [Fe(CN) 6 ...
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4676909 |
Process for recovering noble metals from their cyanide complexes
Noble metals are recovered from their cyanide complexes in aqueous solution by reaction with red phosphorus. To this end, red phosphorus is used in quantities of 1 to 5 weight %, based on the...
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4666212 |
Metal value recovery
Metal values, particularly precious metal values, are recovered from fines on a footwall and in the fissures and cracks therein by passing a solution capable of solubilizing the metal values across...
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4663279 |
Method of beneficiation of complex sulfide ores
A method of beneficiation of complex sulfide ores comprises crushing and grinding complex sulfide ore containing sulfides of copper, zinc, iron and other minerals, subjecting the ground ores to...
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4643891 |
Preparation and use of a .sup.195m Au-containing liquid
A method for preparing a 195m Au-containing liquid is provided. In the method, 195m Hg is adsorbed on an adsorption agent and then the daughter radioisotope 195m Au is eluted from the...
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4629502 |
Pressurized reaction of refractory ores with heat recovery
Metal is removed from particlized metal bearing refractory ores in an efficient manner utilizing pressure metallurgy with heat recovery. The particlized ore is mixed with a heated liquid, and...
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4595572 |
Recovering gold and silver from an aqueous solution containing cyanic compounds of gold and silver
A method of recovering gold and silver efficiently and almost completely from an aqueous solution containing cyanic compounds of gold and silver and which comprises adjusting the pH of the aqueous...
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4585548 |
Recovery of metal values from mineral ores by incorporation in coal-oil agglomerates
Gold ore, or any other mineral treated to have a lyophilic surface, (e.g. chalcopyrites), is ground into a slurry in crusher (1) powdered coal and oil are added at location (2), and the mix is...
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4537628 |
Recovery of precious metals
The extent of recovery of precious metals, preferably gold and silver, from precious metal ores, concentrates, tailings and wastes which are also sulphide- and arsenic- and/or antimony-bearing, is...
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4528166 |
Recovery of gold and/or silver from cyanide leach liquors on activated carbon
The invention concerns the concentration or recovery of gold or silver from cyanide liquors containing either or both of them by contacting the liquors with activated carbon in order to load it...
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4468303 |
Metal recovery
The present invention provides in one aspect a process in which a particulate material containing water and having adsorbed thereon a solubilized gold compound is located in packed form in a...
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4414145 |
Preparation and use of a 195M-AU-containing liquid
A method for preparing a 195m Au-containing liquid is provided. In the method, 195m Hg is adsorbed on an adsorption agent and then the daughter radioisotope 195m Au is eluted from the...
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4406865 |
Metal extraction by solid-liquid agglomerates
A modified liquid-liquid extraction system is disclosed in which a particulate solid and a liquid, both insoluble in a second liquid, are mixed to form agglomerate particles which efficiently...
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4402735 |
Treating deep sea nodules by segregation roasting
A process for recovering nonferrous nickel, copper and cobalt from deep sea nodules to obtain a concentrate rich in the nonferrous metals, a middlings less concentrated in the nonferrous metals and...
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4396585 |
Silver removal with halogen impregnated non-carbon adsorbents
The removal of silver from photographic and other solutions using a non-carbon halogen impregnated adsorbent is described.
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4394354 |
Silver removal with halogen impregnated activated carbon
The removal of silver from photographic and other solutions using halogen impregnated activated carbon is described.
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4386061 |
Method of treating pyrite bearing polymetallic material
A method of treating pyrite bearing polymetallic material comprises heating the material in an atmosphere of reducing gases at a temperature of 450° to 500° C. for a period of 30 to 60 min. Gases...
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4368176 |
Desulfurizing roast of pyrite bearing polymetallic raw material
A method comprises heating the material to be treated without access of air at a temperature of 700° to 800° C. for a period of 1-2 hours, and then subjecting this material to subsequent magnetic...
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