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7357827 |
Integrated ammoniacal solvent extraction and hydrogen reduction of nickel
A process is provided for the recovery of a metallic nickel product in a solvent extraction process which includes the steps of forming a nickel ammine complex by stripping nickel from a nickel...
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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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6267800 |
Process for producing cobalt metal powder from nickel-cobalt sulphides
A process for producing cobalt metal powder from nickel-cobalt sulphides wherein said nickel-cobalt sulphides are leached in an ammoniacal ammonium sulphate solution under an elevated pressure of...
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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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5256187 |
Separation of precious metals by an ion exchange process
The present invention relates to the extraction and separation of low concentrations of precious group metals from acid chloride solutions, which are obtained by leaching catalytic converters, by...
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5173276 |
Method for recovery of copper from copper-containing materials
A process for precipitating solid hydrates of cupric tetrammine sulfate from a solution, wherein the solution contains at least 40 grams per liter of free ammonia, at least 50 grams per liter of...
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5135567 |
Method for producing metal powders from liquid phase containing metal ions
The invention relates to a method for producing metal powders, where the employed raw materials are metal ions in a liquid phase. According to the invention, at a preliminary stage of the method...
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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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4830836 |
Metal stripping system and an operation process therefor
A metal stripping system and an operation process therefor which includes the following elements and steps. A main part of this system is a crystallization apparatus for metal stripping comprising...
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4629500 |
Use of novel rotary tubular kiln
In a rotary tubular kiln for carrying out gas-solids reactions, comprising an indirectly heated, rotatable reaction tube with inner baffles which is provided with charging and removing devices for...
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4541868 |
Recovery of nickel and cobalt by controlled sulfuric acid leaching
According to the present invention, improved dissolution of nickel and cobalt and thus improved recovery of those desired metal values is achieved by modifying the ore recovery processes wherein...
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4497659 |
Production of metals with low selenium contents
Selenium is precipitated from solutions containing at least one metal selected from the group consisting of nickel, cobalt, copper, iron, zinc, manganese, magnesium, chromium and cadmium by adding...
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4485074 |
Process for the recovery of molybdenum from organic solutions
Process for the recovery of molybdenum from an organic solution, such as a spent catalyst solution obtained from the molybdenum catalyzed epoxidation of an olefinically unsaturated organic compound...
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4331520 |
Process for the recovery of hydrogen-reduced metals, ions and the like at porous hydrophobic catalytic barriers
This disclosure concerns primarily the recovery of hydrogen-reduced metals from aqueous solutions of salts thereof, by hydrogen reduction at a porous hydrophobic catalytic barrier, at ordinary...
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4322390 |
Hydrometallurgical recovery of copper, cobalt nickel with reductive and oxidative leaching
Desired metal values are recovered from metal-bearing sources by subjecting said metal-bearing sources to a reduction step which is effected in an aqueous solution of an ammoniacal ammonium salt...
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4276084 |
Hydrometallurgical process for the recovery of lead
A hydrometallurgical process is used to recover lead from a lead-bearing ore concentrate. The lead-bearing ore concentrate is leached with a solution of cupric chloride in order to precipitate lead...
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4214900 |
Production of nonferrous metals with low selenium contents
Selenium is precipitated from solutions or slurries containing nonferrous metals, particularly nickel by contacting the solution or slurries with a semimetallic chromous precipitant of the...
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4159232 |
Electro-hydrometallurgical process for the extraction of base metals and iron
A HYDROMETALLURGICAL PROCESS FOR THE ELECTROLYTIC RECOVERY OF SELECTED BASE METALS (ESPECIALLY COPPER OR POSSIBLY NICKEL) FROM SULPHIDE ORE CONCENTRATES CONCURRENTLY WITH THE EXTRACTION OF METALLIC...
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4148813 |
Nickel and cobalt solvent extraction with mercaptides
A novel class of extractants and a method of using the extractants in the hydrometallurgical recovery of nickel and cobalt metal. The extractants comprise a water immiscible organic solvent system...
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4148631 |
Stripping of cobalt from nickel-cobalt loaded organic
A process for separating nickel and cobalt present in a sulfate solution includes using a cationic extractant to extract both metals, treating the loaded cationic extractant with an aqueous...
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4108640 |
Hydrometallurgical process for the production of cobalt powder from mixed metal sulphides
A process for recovering metallic cobalt from an aqueous ammoniacal solution containing dissolved cobalt and other metals as ammine sulphates with substantially all the dissolved cobalt being in...
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4038361 |
Recovery of nitric acid soluble transition metals from sulfur and iron containing ores of the same
The ore is subjected to nitric acid leaching and the leach solution is heated to a temperature at which one of the additional sulfur and iron values is selectively insolubilized with respect to the...
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3967957 |
Aqueous ammonia oxidative leach and recovery of metal values
Certain mineral values are recovered from source material such as ore, scrap metal, and mixtures in the presence of another metal thereof by aqueous ammonia leaching solution, and the mineral...
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3877931 |
Continuous preparation of pure metals by gaseous reduction
A process for continuously recovering metal powders of high purity from aqueous solutions of the salts thereof which comprises conditioning the aqueous solution to attain a selected free ammonia to...
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3850612 |
PROCESS FOR PREPARING FINELY PARTICLED NICKEL POWDERS HAVING A SPHEROIDAL FORM
A process is disclosed for preparing very finely divided, homogeneous metalic nickel powder of spheroidal shape, with a granulometric range between 0.03 and 0.7 microns and with a very narrow...
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3833351 |
CONTINUOUS PREPARATION OF PURE METALS BY HYDROGEN REDUCTION
A process for continuously recovering metal powders of high purity from acid or ammoniacal leach solutions which comprises conditioning the leach solution to attain a selected free ammonia to metal...
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3658512 |
METAL EXTRACTION
Selective extractions of copper and cobalt values from alkaline solutions containing ammonium ions employ dialkanoylmethanes as the extracting compound.
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3235377 |
Use of an anion exchange resin to absorb cobalt from a solution containing cobalt and nickel
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3147154 |
Method of depositing metal-containing material onto an extended surface
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3141765 |
Process for the production of nickel and cobalt from nickel and cobalt bearing material
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3079235 |
Method of preparing metallic nickel and nickel carbonyl
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3062680 |
Hydrogenation catalysts for reducing reactions
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3007793 |
Preparation of spectrographically nickel-free cobalt
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2836490 |
Method of treating solutions containing metal values
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3767762 |
Title is not available
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3701650 |
Title is not available
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3674465 |
Title is not available
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3600156 |
Title is not available
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3592939 |
Title is not available
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