Matches 101 - 150 out of 175 < 1 2 3 4 >


Match Document Document Title
4472359 Method of pressure leaching  
A process of leaching ores, ore concentrates, intermediate metallurgical products and the like, which contain acid-soluble constituents, by a treatment in an acid aqueous solution under pressure...
4452762 Hydrometallurgical process for the recovery of valuable metals from metallic alloys  
A process for the recovery of valuable metals from metallic alloys having iron as their principal constituent is disclosed in which the metal is leached by means of a sulfuric acid solution having...
4451439 Process for the purification of solutions containing a sodium or potassium carbonate, sulphate, and possibly hydroxide, and at least one of the metals vanadium, uranium and molybdenum  
A process for the purification of solutions containing sodium or potassium carbonate, sulphate, hydroxide or hydrogen carbonate, and mainly at least one of the metals belonging to the group formed...
4441993 Flotation process  
A process for recovering metallic values by putting the values into solution and separating undesired mineral matter from the solution using countercurrent flotation is provided. The process...
4434142 Method for treatment of aluminum dross oxides  
There is disclosed a method for the treatment of aluminum dross oxides which contain aluminum metal, aluminum carbide, aluminum nitride and salts such as potassium and sodium chloride. The method...
4424194 Process for extraction of metals from leachable ores and forming of building materials  
The method for extraction of precious metals from leachable ores and forming a building materials which includes the steps of crushing a quantity of leachable ore into a powder of substantially...
4410496 Recovery of metal values from complex sulfides  
Metal values, such as copper, lead and zinc, are recovered from complex sulfides, e.g., ores or smelter flue dusts, by means of aqueous leaching in the presence of oxygen and CaCl2 or BaCl2 at...
4395384 Process for treating zircon  
A process for the treating of zircon to remove a coating which contains iron from the surface of individual grains to make them move amenable to electrostatic and magnetic separation, wherein the...
4382073 Method for processing a solid gravel like material with a fluid  
A method and an apparatus for treating a gravel type solid material with a liquid in a bath are described. The apparatus comprises means for supplying the solid material, means for transporting it...
4360380 Process for recovery of metal values from sludges  
A process for the recovery of selected metal values from silica containing sludges including incineration of the sludge to degrade organic components, followed by acid leaching of the ash,...
4360500 Mineral leaching  
Uranium ore is crushed and formed into a slurry. The slurry is pumped into a leaching tank and classified by a sparge tube projecting water at teeter velocity at the bottom of the ore bed....
4348228 Yield of metal values from incinerated sludges  
A process for the recovery of selected metal values from silica containing sludges including incineration of the sludge to degrade organic components, followed by acid leaching of the ash,...
4344839 Process for separating oil from a naturally occurring mixture  
A process for separating hydrocarbons from naturally occurring mixtures comprising minerals and inorganic materials originating from rock admixed with oil, for example tar sands and oil shales....
4330511 Treatment of blast furnace off-gas  
Off-gas produced by a blast furnace is treated by scrubbing and cooling the gas with water and then settling solids from the liquid effluent. The liquid effluent is cooled following settling, and...
4329320 Method and treatment of a gaseous mixture of ammonia, carbon dioxide and water vapor  
A method of condensing a gaseous mixture of ammonia carbon dioxide gas and water vapor to produce an ammonium carbonate solution with minimum formation of ammonium carbamate includes passing the...
4307066 Extraction of metals from mixtures of oxides or silicates  
Metals are extracted from mixtures of oxides or silicates by reacting the mixture at elevated temperature with a gaseous chlorinating agent comprising a mixture of water vapor and hydrogen...
4301121 Method for leaching metal bearing ores  
Disclosed is a method for above-ground leaching of metal bearing ores comprising (a) providing an ore body to be leached having positioned therein void-creating members, said members being...
4288411 Process for the selective production of a plurality of individual pure halides and/or halide mixtures from a mixture of solid oxides  
The process is based on the series of halide-forming affinities. The oxides are passed through a series of zones equal in number to the plurality of halides or mixtures which are to be produced. A...
4282189 Precipitation of metal values from organic media  
Metal values, such as iron, may be stripped from an organic liquid medium loaded with metal ions by a process which comprises contacting the organic medium with an aqueous phase at a contact...
4276266 Process for recovering metal elements from carbonaceous products  
The process comprises oxidation of alkali-metal-containing carbonaceous products at a temperature of at least 800° C. in a fluidized bed of fire-proof particles capable of trapping or fixing the...
4269808 Method of simultaneously subjecting ores to pulverization and leaching or extraction  
There is provided a method for simultaneously carrying out pulverization of ores and their leaching or extraction within a vertical abrasion mill.
4237101 Process for treating solid carbonaceous fossil fuels and the products thus prepared  
Solid carbonaceous fossil fuels such as coal, lignite and peat are treated with an aqueous medium containing a novel catalyst to remove undesirable constituents and produce valuable products. The...
4229182 Recovery of aluminum from composite propellants  
Aluminum is recovered from solid rocket propellant containing a small amount of oxidizer by depolymerizing and dissolving propellant binder containing functional or hydrolyzable groups in a...
4225563 Process and apparatus for continuous leaching of ores  
A process for the continuous leaching of ores and an apparatus for practicing this continuous leaching process are disclosed. According to this process, a plurality of unit layers composed of a...
4220627 Process for the treatment of raw materials containing arsenic and metal  
A process for the treatment of raw materials which contain arsenic and metal to produce a metal-free arsenic product and an arsenic-free metal sulfate is disclosed, in which the raw material is...
4220629 Chlorination of ores with catalyzed metal chlorides  
The invention comprises a process for the manufacture of metal chlorides by the double-decomposition reaction between a metal chlorinating agent and a metal oxide having greater affinity for...
4203964 Re-extracting metal chloride complex from an organic extraction solution  
The invention relates to the re-extraction of a metal from an organic extraction solution in which the metal is present as a metal chloride complex bonded to an extractant. The organic extraction...
4192851 Leaching of metal sulphides  
The process of the invention is for the separate recovery of elemental sulfur and residual sulfides and metal salt solution from reaction slurries obtained from leaching of metal sulfides in ores...
4191727 Method for the separation of a mixture of fine particles  
A method for the separation of a mixture of fine particles wherein the fraction to be separated has a surface which is more reactive chemically than the remaining fractions by grinding the mixture...
4186174 Process and apparatus for obtaining a more concentrated solution of a component using ion exchange beds  
A process and apparatus for obtaining a more concentrated solution of components such as chromium containing anions by the use of ion exchange beds. A solution containing the component to be...
4154607 Process for disposal of sodium sludge  
A process for safely and conveniently disposing of active metal residue, such as a mixture of alkali metal and alkaline earth metal, by introducing the residue into a furnace in which it is...
4150093 Method for concentrating heavy minerals in the solids tailings from hot water extraction of tar sands  
An oily mass of solids tailings is derived from flotation of bitumen during hot water extraction of bituminous sands, and subsequent separation of most of the bitumen from associated solids. This...
4145395 Deactivating particulate waste containing hydrolyzable metal chlorides  
Particulate waste comprising hydrolyzable metal chlorides, typically chlorinated byproducts from the chlorination of titaniferous material, is treated in an oxidizing atmosphere at elevated...
4132628 Method for recovering hydrocarbons from molten metal halides  
In a process for hydrocracking heavy carbonaceous materials by contacting such carbonaceous materials with hydrogen in the presence of a molten metal halide catalyst to produce hydrocarbons having...
4127406 Process for the heat treatment of fine material  
Fine solid material is preheated in a first zone, then heated to the final treatment temperature by passing it through a flame in a second zone, and then separated in a third zone from the hot...
4119699 Method for wet metallurgical processes  
A reactant gas is mixed intimately with a liquid and/or particulate solution in a pressurized container and agitated with high energy. Mixing occurs initially by spraying the liquid and gas...
4100251 Method of recovering metals out of soot originating from the combustion of oil  
Soot produced in the combustion of fuel oil contains valuable metals, such as vanadium and nickel. The soot can be disposed of, and the valuable metals can be recovered, by leaching the soot with...
4089928 Method for increasing the MnO2 content of natural manganese dioxide ore  
An active natural manganese dioxide mineral for use in dry battery cells is produced from a natural manganese dioxide ore by reacting the ore or a preconcentrate thereof with a solution of an...
4074865 Method of recovering platinum group metal values from a used washcoated catalyst  
This invention relates to the recovery of metallic values from materials such as catalysts containing or supporting the values. The method comprises removing a layer or layers and a catalyst...
4071278 Leaching methods and apparatus  
In a leaching process to recover a selected element or mineral from a gangue, an AC current is applied to the mixture to accelerate the rate at which chemical reactions occur. If the treated...
4071612 Process for the incineration of contaminated salt-bearing solutions  
Process and apparatus for incinerating contaminated salt-bearing solutions in a fluidized bed to which streams of solution, of fuel required for incineration and of combustion air are injected and...
4070437 Process for the recovery of metal chlorides from jarosite sludges resulting from the sulphuric acid processing of ores  
In a process for the recovery of metal chlorides from jarosite in sludges which result from the sulphuric acid processing of ores, the sludge is treated with an aqueous solution of an alkaline...
4042671 Process for leaching sand or other particulate material  
A process for leaching sand to remove iron and other undesirable components in which the sand is treated with a series of leaching solutions which increase in acid concentration to about the...
4031039 Method for treating waste high-polymer mixture  
A method for treating a waste high-polymer mixture by fractionating the mixture consisting essentially of five groups of high polymers, i.e., polyolefinic, polystyrenic, polyvinyl-chloride,...
4025523 Cyclic tetra-oxyethylene complexes with ionic compounds  
Novel complexes between (a) a compound of the formula ##STR1## where R1, R2, R3 and R4 are independently H or C1 -C3 alkyl; and (b), salts of one of the cations Li, Na, K, Rb, Mg, Ca, Sr, Mn (II),...
4024054 Method of separating ionized substances from an aqueous solution  
In a method of separating ionized substances such as heavy metal ions from mixture dissolved in aqueous solution such as sea water, lake water, waste water and the like containing at least 0.5 mM...
4019896 Trash disposal system  
Apparatus and a method of disposing of trash comprised of a wide variety of constituents including garbage, metals, glass, plastic and other scrap materials, wherein the trash is directed into an...
3983222 Removing nitrates with an organic amine salt and ion exchange  
A continuous process for removing nitrates from nitrate containing aqueous solutions having a pH of about 0-7, which comprises: (1) extracting the nitrate containing aqueous solution with an...
3981965 Suppression of water pollution caused by solid wastes containing chromium compounds  
A method of treating solid waste material containing minor amounts of water soluble chromium compounds with a reductant, particularly sulfide ions, to convert the soluble chromium to an insoluble...
3969476 Solvent-in-pulp extraction  
In solvent-in-pulp extractions where aqueous leach slurries containing dissolved metal values and gangue particles of the silica, sericite or sulphide types are contacted with organic amine...

Matches 101 - 150 out of 175 < 1 2 3 4 >