| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 423138000 | Iron group metal (Fe, Co, or Ni) | 65 |
| 20090047198 | Process for the extraction of specific transition metals with gaseous HCl - A process is disclosed for separation and recovery of vanadium, molybdenum, iron, tungsten, cobalt and nickel from alumina-based materials, mattes, ores, manufacturing by-products and waste. These elements are oxidized. The oxides are reacted with gaseous HCl to form volatile chloride-bearing compounds that subsequently sublimate. The volatile compounds are condensed in a downward-stepped thermal gradient that allows collection of moderate to high purity compounds of individual elements with exception of a nickel-cobalt co-condensate. Nickel is separated from cobalt by precipitation of nickel chloride from concentrated HCl pressurized with gaseous HCl. | 02-19-2009 |
| 20090202406 | Treatment of Green Pellets Using Microwave Energy - A method and apparatus for producing iron ore pellets containing hematite is described. The pellets containing magnetite are exposed to microwave energy in a heat treatment furnace under oxidizing conditions to convert magnetite to hematite. | 08-13-2009 |
| 20110038770 | Processing Nickel Bearing Sulphides - A method of separating nickel bearing sulphides from mined ores or concentrates of mined ores that contain talc is disclosed. The method comprises treating a slurry of mined ores or concentrates of mined ores in at least one flotation stage and in at least one cleaner circuit. The method further comprises sequenced re-grinding, as described herein, of particles in the slurry. | 02-17-2011 |
| 20110081284 | TREATMENT OF BAUXITE RESIDUE AND SPENT POT LINING - Methods of treating spent pot lining (SPL) and bauxite residue are disclosed. The treatment processes are capable of producing a ferrosilicon alloy, an off-gas, and/or a byproduct material resulting in the safe disposal of SPL and bauxite residue. The treatment processes may be continuously carried out in an electric arc furnace at a temperature in the range of from about 1500° C. to about 2200° C. and for a period of from about 15 to about 100 minutes. | 04-07-2011 |
| 20130052104 | PROCESS FOR THE RECOVERY OF METALS AND HYDROCHLORIC ACID - A method for recovering hydrochloric acid and metal oxides from a chloride liquor is described. The method uses a chloride liquor including the metal and mixing the liquor and a matrix solution to produce a reaction mixture, wherein the matrix solution assists oxidation/hydrolysis of the metal with HCl production. In a preferred embodiment the matrix solution includes zinc chloride in various stages of hydration and an oxygen containing gas is added to the mix. A method where the improvement is the mixing of a liquor and a matrix solution where the solution assists hydrolysis of the metal with HCl production is also disclosed. The reactor is a column reactor in a preferred embodiment. Further disclosed is the method of using the matrix solution and a reactor for recovering hydrochloric acid and for oxidizing/hydrolysis of a metal. | 02-28-2013 |
| 20130236379 | PROCESSES FOR MAKING HIGH IRON CONTENT STABLE FERRIC CHLORIDE SOLUTIONS - Processes for forming high iron content ferric chloride solutions, reconstituting ferric chloride solutions, and transporting the stable ferric chloride solutions with the high iron content are disclosed. | 09-12-2013 |
| 20130266495 | MANUFACTURING METHOD AND MANUFACTURING DEVICE FOR MULTIPLE OXIDE - A method for manufacturing a multiple oxide includes: a solution preparing step of adding to iron and steel pickling waste liquid, a lithium compound soluble in acidic aqueous solution and an oxoanion raw-material compound to prepare a mixed solution; a roasting step of introducing the mixed solution into a roasting furnace to roast the mixed solution; and a collecting step of collecting the multiple oxide obtained in the roasting step. | 10-10-2013 |
| 20140348730 | HYDROGEN CHLORIDE REMOVAL PROCESS - A hydrogen chloride removal process includes (i) contacting in a reactor an aqueous solution, which includes one or more Fe | 11-27-2014 |
| 20150360966 | PROCESS AND APPARATUS FOR OBTAINING MATERIAL OF VALUE FROM A BAUXITE RESIDUE - The invention relates to a process for obtaining material of value from a bauxite residue which is obtainable or has been obtained by the Bayer process. This process comprises the steps of a) providing an aqueous suspension of the bauxite residue, b) setting a pH of the suspension to a value between 7.2 and 12.2, c) at least partly deagglomerating suspended mineral agglomerates of the bauxite residue, and d) separating the resulting mixture into an iron-rich fraction and into at least one further, preferably silicate-rich fraction. The invention further relates to an apparatus ( | 12-17-2015 |
| 20160137498 | Method for Recovering Hydrochloric Acid from Metal Chloride Solutions with a High Iron Chloride Content - A method for recovering hydrochloric acid from concentrated metal chloride solutions displaying an iron chloride content of more than 50% by weight where the Fe | 05-19-2016 |
| 20160152487 | PROCESS FOR PRODUCING HEMATITE FOR IRONMAKING | 06-02-2016 |
| 20170232286 | METHOD OF ASBESTOS DETOXIFICATION | 08-17-2017 |
| 423139000 | Ion exchanging or liquid-liquid extracting | 16 |
| 20090068076 | Nickel sulphide precipitation process - The invention provides hydrometallurgical processes by which dissolved nickel may be removed from water at ambient temperature and low system pressure. | 03-12-2009 |
| 20090087361 | PRODUCING NICKEL HYDROXIDE SUITABLE FOR PELLETIZATION WITH IRON-CONTAINING ORE AND FOR STAINLESS STEEL MANUFACTURE - A process for producing a purified nickel hydroxide precipitate from a nickel-containing leach solution with impurities including one or more of the following: manganese, copper, zinc, iron and/or cobalt, so that the purified nickel hydroxide is suitable for pelletization with iron-containing ores and/or stainless steel production, includes treating the leach solution with a base to form a slurry of mixed hydroxide precipitate and low-nickel barren solution, thickening the slurry to form filter cake, washing the filter cake and contacting it with acid to dissolve nickel and other metals to produce a concentrated nickel-containing solution, subjecting the concentrated nickel-containing solution to solvent extraction with an organic acid extractant to remove metals other than nickel from the nickel-containing solution and form a solvent extraction raffinate of purified nickel solution and treating the solvent extraction raffinate with a base to precipitate the purified nickel hydroxide precipitate. | 04-02-2009 |
| 20090324467 | MAGNETIC CHEMICAL ABSORBENT, PRODUCTION PROCESS FOR THE SAME AND RECYCLING METHOD FOR THE SAME, AS WELL AS WASTE-LIQUID TREATING METHOD - A magnetic chemical absorbent according to the present invention is provided with a composite, which is constituted of a core substance comprising magnetite fine particles and schwertmannite being precipitated around the core substance to chemically bond therewith. This magnetic chemical absorbent can be produced in a hydrolysis reaction step, in which crystal of schwertmannite is precipitated by means of hydrolysis reaction by heating a solution of ferric salt and thereafter adding a reactive substance thereto, by means of adding magnetite fine particles into the solution after the solution is heated and before the precipitation of the crystal begins. | 12-31-2009 |
| 20110135547 | METHOD FOR RECOVERING NICKEL FROM SULFURIC ACID AQUEOUS SOLUTION - A method for recovering nickel from an sulfuric acid aqueous solution, for recovering nickel in an effectively utilizable form as a raw material of nickel industry material, by separating efficiently impurity elements of iron, aluminum, manganese and the like, from the sulfuric acid aqueous solution containing nickel and cobalt, and the impurity elements, iron, aluminum, manganese and the like. | 06-09-2011 |
| 20110150729 | Process for Heap Leaching of Nickeliferous Oxidic Ores - A process for the recovery of nickel and cobalt from a nickeliferous oxidic ore by heap leaching and/or atmospheric agitation leaching, the process including the steps of: mixing a sulfur containing reductant selected from reductants that do not include copper into a nickeliferous oxidic ore; leaching the reductant/ore mixture with an acidic leach reagent to produce a pregnant leach solution including nickel, cobalt, iron substantially in a ferrous form and other acid soluble impurities; and recovering the nickel and cobalt from the pregnant leach solution. | 06-23-2011 |
| 20110194999 | COBALT RECOVERY - A method for extracting cobalt from copper raffinate. First, a supply of raffinate containing at least cobalt, copper, ferric iron and nickel, is provided. The raffinate is pretreated by one or all of raising the raffinate pH level; removing solids; and, reducing ferric iron to ferrous iron. Substantially all copper is removed using first ion exchange resin selective for copper. A second ion exchange resin selective for both cobalt and nickel is used to remove the cobalt and nickel. Cobalt and nickel are separately eluted from the second ion exchange resin. | 08-11-2011 |
| 20110195000 | ION EXCHANGE COBALT RECOVERY - Method of ion exchange cobalt recovery. Raffinate including cobalt, zinc, copper, nickel and ferric iron is produced. In the raffinate, the pH is raised, the solids are removed and ferric iron is reduced. A copper recovery ion exchange unit is loaded with ion exchange resin selective for copper. Raffinate is fed into the copper recovery ion exchange unit which is regenerated to recover substantially all copper. A cobalt/nickel/zinc recovery ion exchange unit is loaded with another ion exchange resin selective for cobalt. Raffinate is fed into the cobalt/nickel/zinc recovery ion exchange unit, the ion exchange resin holding cobalt, zinc and nickel, and then displaced. Cobalt/zinc eluent is fed into the cobalt/zinc/nickel recovery ion exchange unit to elute the cobalt and zinc in a cobalt/zinc solution, and then displaced. Nickel eluent is fed into the cobalt/zinc/nickel recovery ion exchange unit to elute the nickel. | 08-11-2011 |
| 20120213681 | DIRECT PURIFICATION OF A NICKEL LATERITE LEACHING EFFLUENT - The present invention refers to a direct purification process of a nickel laterite leaching effluent including adjusting a pH of a leaching solution, employing an ion exchange resin to adsorb nickel and copper selectively over ferric or ferrous iron, and recovering nickel. | 08-23-2012 |
| 20140294702 | RECOVERY OF NICKEL IN LEACHING OF LATERITE ORES - The invention provides a process for the leaching of a laterite ore or concentrate for the recovery of value metals, at least one value metal being nickel. The laterite ore or concentrate is subjected to a leaching step with a lixiviant comprising hydrochloric acid to leach nickel from the laterite ore. Nickel is extracted with an oxime at a lower pH than other processes for extraction of nickel from solution, especially after separation of iron and cobalt values. | 10-02-2014 |
| 20140294703 | METHOD FOR PRODUCING HIGH-PURITY COBALT SULFATE AQUEOUS SOLUTION - Disclosed herein is a method for easily and efficiently removing manganese from an aqueous acidic solution of sulfuric acid containing cobalt and manganese at low cast to obtain a high-purity cobalt sulfate aqueous solution usable as a raw material for lithium ion secondary batteries. The high-purity cobalt sulfate aqueous solution is obtained by mixing an aqueous acidic solution of sulfuric acid containing cobalt and manganese (aqueous phase) with an acidic organic extractant (organic phase) while adjusting the pH of the aqueous acidic solution of sulfuric acid to a value in a range between 2 and 4 with a pH adjuster such as sodium hydroxide to extract manganese into the organic phase. The acidic organic extractant to be used is preferably diluted so that the concentration of di-2-ethylhexyl phosphate is 10 to 30 vol %. | 10-02-2014 |
| 20140308182 | Method for Concentrating Metal Chlorides in and Separating Same from an Iron(III) Chloride-Containing Hydrochloric Acid Solution - A method for concentrating metal chlorides in and separating same from an iron(III) chloride-containing hydrochloric acid solution is described, wherein iron is precipitated from the solution as iron oxide, preferably haematite and filtered off in a filtration device, and the now further concentrated non-hydrolysable metal chlorides are removed from at least a part of the hydrochloric acid filtrate. | 10-16-2014 |
| 20140322109 | METHOD FOR PRODUCING HIGH-PURITY NICKEL SURFACE - Provided is a production method for obtaining high purity nickel sulfate having low levels of impurities, particularly low levels of magnesium and chloride, by adjusting the concentration of an extractant and the pH concentration at the time of treatment in a process of obtaining a nickel sulfate solution having a high nickel concentration by solvent extraction using an acidic organic extractant. | 10-30-2014 |
| 20140328737 | COBALT EXTRACTION METHOD - The objective of the present invention is to selectively extract cobalt from an acidic solution containing a high concentration of manganese. This cobalt extraction method extracts cobalt from an acidic solution containing manganese and cobalt by subjecting the acidic solution to solvent extraction by means of a valuable metal extraction agent comprising an amide derivative represented by general formula (I). The valuable metal extraction agent is represented by the general formula. In the formula: R | 11-06-2014 |
| 20140348731 | METHOD FOR PRODUCING COBALT SULFATE - Provided is a method for producing cobalt sulfate, wherein, on the occasion of separating an acidic solution containing calcium, magnesium and sodium as impurities from a cobalt chloride solution by solvent extraction, when a diluent is added to the extractant to be used to dilute the extractant by 10% to 30% by volume; in Step 1, the operational pH is maintained in the range of 4.0 to 5.0 and the liquid volume ratio of organic phase/liquid phase is maintained in the range of 5.0 to 7.0; in Step 2, the operational pH is maintained in the range of 4.0 to 4.5 and the liquid volume ratio of organic phase/liquid phase is maintained in the range of 5.0 to 10.0; and in Step 3, the pH is maintained in the range of 0.5 to 1.0. | 11-27-2014 |
| 20150315674 | NICKEL EXTRACTION METHOD - In the present invention, nickel is selectively extracted from an acidic solution that contains a high concentration of manganese. This valuable metal extraction agent is represented by the general formula. In the formula, R | 11-05-2015 |
| 20150361524 | Method for Purification of a Cobalt Containing Solution by Continuous Ion Exchange - Methods are for purification of a cobalt containing solution from impurity metals by processing the feed solution through a continuous counter-current ion exchange process comprising of several beds containing cationic ion exchange material arranged in interconnectable zones 1, 2, 3-N in a simulated moving bed arrangement. | 12-17-2015 |
| 423140000 | Forming insoluble substance in liquid | 21 |
| 20110158869 | PROCESSING METHOD FOR RECOVERING IRON OXIDE AND HYDROCHLORIC ACID - A method of processing waste iron chloride solution including ferrous chloride, ferric chloride or mixtures thereof and optionally free hydrochloric acid, includes concentrating waste iron chloride solution into concentrated liquid having iron chloride concentration of at least 30%-40% by weight; optionally oxidizing ferrous chloride in the concentrated liquid from the concentration step to ferric chloride providing liquid containing ferric chloride; hydrolyzing the liquid containing ferric chloride from the oxidation step at 155-350° C., maintaining the ferric chloride concentration at least at 65% by weight, generating steam containing hydrogen chloride and liquid containing ferric oxide; separating ferric oxide from the liquid containing ferric oxide in the hydrolysis step; condensing steam containing hydrogen chloride in the hydrolysis step, recovering hydrochloric acid at a concentration of at least 10%-15% by weight; and using condensation energy of the hydrogen chloride containing steam in the recovery step to heat the concentration step performed under reduced pressure. | 06-30-2011 |
| 20110256039 | METHOD FOR REGENERATING AMORPHOUS IRON OXIDE HYDROXIDE AND DESULFURIZER CONTAINING AMORPHOUS IRON OXIDE HYDROXIDE AS ACTIVE COMPONENT - Methods for regenerating amorphous iron oxide hydroxide after being used as desulfurizer by (1) grinding a waste mixture into waste powder, wherein the waste mixture results from use of the composition comprising amorphous iron oxide hydroxide as desulfurizer; (2) preparing the waste powder into a suspension and charging the suspension with a gas containing oxygen to obtain a slurry comprising amorphous iron oxide hydroxide and elemental sulfur; and (3) placing the slurry or a solid resulting from filtering the slurry into a container and charging the slurry or the solid with air so that the elemental sulfur floats and the amorphous iron oxide hydroxide precipitates. | 10-20-2011 |
| 20130052105 | System and Method for Processing Aqueous Solutions - A system and method for processing aqueous solutions is provided. A method for controlled bubble collapse is provided, which catalyzes chemical reactions in aqueous solutions that cause metal and other ions and compounds in solution to form hydroxide, oxide, protonated, polyatomic and other stable precipitate species, compounds or complexes. The reactions convert metal ions in solution into stable metal hydroxide, oxide and other precipitates or solid complexes. Further processing including recirculation, detention, precipitate formation and detection can be utilized. Pressure and flow modulated and regulated recirculation of precipitate laden aqueous solution through a hydrocyclone particle or precipitate separation circuit can also be utilized. | 02-28-2013 |
| 20140170040 | NICKEL RECOVERY LOSS REDUCTION METHOD, HYDROMETALLURGICAL METHOD FOR NICKEL OXIDIZED ORE, AND SULFURATION TREATMENT SYSTEM - A nickel recovery loss reduction method that makes it possible to reduce nickel recovery loss by lowering the concentration of fine floating solid components in overflow liquid in precipitating and separating treatments, and consequently to further reduce a nickel recovery loss, a hydrometallurgical method for nickel oxidized ore to which the nickel recovery loss reduction method is applied, and a sulfurizing treatment system. The present invention is a nickel recovery loss reduction method in a sulfurizing step for blowing hydrogen sulfide gas into a nickel containing sulfuric acid aqueous solution to generate nickel-containing sulfides and a barren liquid, and the nickel-containing sulfides with the average particle size adjusted to a predetermined size or larger are added as seed crystals to the sulfuric acid aqueous solution. It is more preferable to adjust the average particle size of the nickel sulfides to be added as seed crystals to 55 μm or more. | 06-19-2014 |
| 20140308183 | METHOD FOR PRODUCING NICKEL-CONTAINING ACID SOLUTION - The method for obtaining an acid solution containing nickel is obtained by treating a positive electrode material of a nickel-metal hydride battery. The method includes a water-washing step, wherein a positive electrode material of a nickel-metal hydride battery is water-washed by adding water, and then separated to form a positive electrode material after water-washing and a water-washed slurry. An acid-washing step then is performed, wherein an acid is added and mixed into the positive electrode material obtained after water-washing in the water-washing step, and, separation is performed to form a positive electrode material after acid-washing and an acid-washed slurry. A dissolution step is performed wherein the positive electrode material obtained in the acid-washing step is separated into a nickel solution and a dissolution residue by adding any one of an acid and an oxidizing agent. | 10-16-2014 |
| 20150023849 | DEZINCIFICATION PLANT, METHOD FOR OPERATING DEZINCIFICATION PLANT, AND HYDROMETALLURGICAL METHOD FOR NICKEL OXIDE ORE - The present invention provides a hydrometallurgical method for nickel oxide ore, wherein the plant can be smoothly started up without imposing a load onto a filter cloth for a separation treatment of zinc sulfide, and the amount of residual zinc in a mother liquor for nickel recovery can be reduced to 1 mg/L. In the plant start-up after the completion of a periodic inspection, a post-neutralization solution is controlled to return to a neutralization reaction tank via circulation piping by adjustment of a switching valve in flow piping without sulfurizing post-neutralization solution. When the flow rate and/or the temperature of the post-neutralization solution circulated reaches a predetermined value, a sulfurization treatment is applied to the post-neutralization solution in the dezincification reaction tank to form zinc-sulfide-containing mother liquor for nickel recovery and adjust the switching valve. Zinc-sulfide-containing mother liquor for nickel recovery is transferred to a filter apparatus via transfer piping. | 01-22-2015 |
| 20150023850 | NEUTRALIZATION METHOD AND NEUTRALIZATION PLANT - A method for improving the filterability in separating a zinc sulfide, produced by applying sulfurization treatment to a post-neutralization solution containing zinc together with nickel and cobalt in a dezincification step in a hydrometallurgical process for nickel oxide ore. The method includes a neutralization reaction step of neutralizing leachate in a neutralization tank, a separation step of separating neutralized slurry into a neutralized sediment and a post-neutralization solution by adding flocculant to the neutralized slurry, a measuring step of measuring the viscosity of the post-neutralization solution, a step of storing the post-neutralization solution in a storage tank, and a transfer step of transferring the stored post-neutralization solution to a dezincification reaction tank used in a dezincification step subsequent to a neutralization step. | 01-22-2015 |
| 20150023851 | METHOD FOR PRODUCING HEMATITE FOR IRONMAKING - Provided is a method for producing hematite for ironmaking, wherein high purity hematite, which can be used as an iron-making raw material, is cheaply and efficiently recovered from a leach residue containing iron oxide produced by a high pressure acid leach (HPAL) process. This method for producing (high purity) hematite for ironmaking in a process of adding a mineral acid and an oxidant to ore containing iron and valuable metals and then leaching the valuable metals under high pressure and high temperature includes (1) a neutralization step of adding a neutralizer to a leachate obtained under high pressure and high temperature to form a leach slurry, (2) a solid-liquid separation step of separating the leach slurry obtained in the neutralization step (1) into a leach residue and the leachate, and (3) a classification step of classifying the leach residue into the hematite and gangue components. (145 words) | 01-22-2015 |
| 20150361522 | METHOD OF PRECIPITATION OF IRON FROM LEACH SOLUTIONS - We propose a method of removing iron from leach solutions, obtained by leaching of metal bearing materials with acids, in the form of hydroxide and/or oxide by precipitation. The advantages with the method according to the invention include that the method can be performed at atmospheric pressure and at temperatures from ambient to boiling temperatures and that no gases are emitted. Another important advantage is, by prevention of gel formation of the iron precipitate, that solid/liquid separation becomes much easier and loss of valuable metals is minimized. | 12-17-2015 |
| 20160052796 | METHODS FOR PREPARING HEMATITE - There are provided methods for preparing hematite. For example, the method can comprise reacting a basic aqueous composition comprising the iron and the aluminum with hematite under conditions suitable for at least partially converting the iron into hematite under the form of a precipitate, thereby obtaining a liquid phase and a solid phase; and separating the liquid phase from the solid phase. | 02-25-2016 |
| 423141000 | Subjecting mixture to pressure, vacuum, or steam | 3 |
| 20150353375 | PROCESS FOR THE RECOVERY OF IRON AS HEMATITE AND OTHER METALLIC VALUES FROM A SULPHATE LEACH SOLUTION - We propose a method for recovering iron from ferric sulphate solutions, obtained from leaching of metal bearing materials with sulphuric acid to produce an iron bearing leach solution, in the form of oxide as a useful product by precipitation as hydroxide, by subsequent pressure oxidation, and then by calcining of the iron hydroxide. | 12-10-2015 |
| 20160159661 | Method for the Further Processing of Iron Sulfate Heptahydrate - The invention relates to a method for the further processing of iron sulfate heptahydrate into iron sulfate monohydrate. An aqueous solution or suspension of iron sulfate heptahydrate is formed and heated in a pressure vessel to a temperature above its boiling temperature at atmospheric pressure and where solid iron sulfate monohydrate and a solution are formed. The solid iron sulfate monohydrate is separated from the solution and fed into a pressure vessel at a temperature above the boiling temperature of the solution at the pressure in the pressure vessel, which is lower than the pressure during separation. | 06-09-2016 |
| 20160194215 | METHOD FOR PRODUCING HEMATITE FOR IRONMAKING | 07-07-2016 |
| 423142000 | Agitating during reaction | 1 |
| 20140314641 | FLOTATION REAGENTS AND FLOTATION PROCESSES UTILIZING SAME - Methods of enhancing recovery of value sulfide and/or precious-metal minerals from an ore containing said minerals and a Mg-silicate, slime forming mineral, and/or clay, and which is subjected to a froth flotation process, by adding to one or more stage of the froth flotation process a froth phase modifier having a polymer containing one or more functional groups, and optionally a monovalent ion modifier enhancing agent, thereby enhancing recovery of a value sulfide mineral and/or a precious metal-bearing mineral. | 10-23-2014 |
| 423143000 | Utilizing or forming nitrogenous compound | 1 |
| 20140377153 | METHOD FOR PREPARATION OF HIGH PURITY,CRYSTALLINE COBALT NITRATE FROM SPENT COBALT/SILICA CATALYST - A method for preparing crystalline cobalt nitrate. The method includes: 1) calcining a spent Co/SiO | 12-25-2014 |
| 423146000 | Sulfating | 6 |
| 20130052106 | PROCESS FOR THE PRODUCTION OF FERROUS SULPHATE MONOHYDRATE - The invention provides a process for the production of ferrous sulphate monohydrate which comprises: (a) reacting a source of iron with an aqueous solution of sulphuric acid in at least a first reaction vessel, to obtain a process liquor comprising ferrous sulphate and acid solution; and then (b) combining the process liquor with concentrated sulphuric acid in a mixing vessel, causing the solution to self crystallize, thus forming a slurry comprising crystalline ferrous sulfate monohydrate. The slurry can, if desired, then be converted to ferric sulphate. | 02-28-2013 |
| 20140037520 | PROCESS FOR TREATING SPENT PICKLE LIQUOR AND/OR FERROUS CHLORIDE - A process for treating spect pickle liquor has the steps of mixing the spent pickle liquor with sulfuric acid, introducing oxygen into the mixture of spent pickle liquor and the sulfuric acid for a period of time, and producing diiron(II) tetrachlorosulfate from the oxygen-introduced mixture of sulfuric acid and spent pickle liquor. The spent pickle liquor and the sulfuric acid are introduced into a column. The oxygen is passed under pressure into the column. The intimate mixture of spent pickle liquor, sulfuric acid and oxygen are maintained under pressure for a period of time. | 02-06-2014 |
| 20140348732 | OPERATING METHOD IN HYDROMETALLURGY OF NICKEL OXIDE ORE - It is an object to provide a method for producing magnesium oxide by which magnesium oxide being high in purity and low in impurity content can be produced simply and efficiently from a sulfuric acid solution containing magnesium and calcium such as waste water. In the present invention, calcium is precipitated as calcium sulfate and separated by concentrating a sulfuric acid solution containing magnesium and calcium, and magnesium is precipitated as magnesium sulfate and separated by further concentrating the solution resulting from the separation of calcium. The separated magnesium sulfate is roasted together with a reductant, so that magnesium oxide and sulfur dioxide are obtained. The resulting magnesium oxide is washed to produce magnesium oxide with high purity. | 11-27-2014 |
| 20150078972 | METHOD FOR PRODUCING HIGH-PURITY NICKEL SULFATE - Provided is a method of producing high-purity nickel sulfate by an impurity-element removal method for selectively removing Mg from a Ni-containing solution. The method comprises a production process of producing nickel sulfate from a Ni-containing acid solution, the acid solution being treated in order of steps (1) to (3): (1) carbonation step, adding a carbonating agent into the Ni-containing solution to make Ni contained in the Ni-containing solution into a precipitate of nickel carbonate or a mixture of nickel carbonate and nickel hydroxide, thereby forming a slurry after carbonation including the precipitate and a solution after carbonation; (2) solid-liquid separation step, separating the slurry after carbonation formed in the carbonation step into the precipitate and the solution after carbonation; and (3) neutralization step, adding a neutralizing agent into the solution after carbonation separated through the solid-liquid separation step to recover Ni contained in the solution after carbonation as a Ni-precipitate. | 03-19-2015 |
| 20160137524 | HEMATITE MANUFACTURING PROCESS AND HEMATITE MANUFACTURED BY SAME - Magnesium oxide produced by a process is used as a neutralizing agent for preliminary neutralization treatment of a leached slurry obtained by leaching a nickel oxide ore at a high temperature and pressure with sulfuric acid added. A neutralizing agent is added to a leachate, obtained by leaching a nickel oxide ore, to separate impurities, and a sulfurizing agent is added to the resulting neutralized solution to obtain nickel and cobalt sulfides, followed by separating the sulfurized solution; discharge waste water, obtained by adding a neutralizing agent to the sulfurized solution to separate aluminum and manganese, is concentrated to precipitate and separate calcium contained in the discharge waste water as calcium sulfate; the resulting solution is concentrated to precipitate magnesium in the solution as magnesium sulfate; the magnesium sulfate is roasted with a reducing agent to obtain magnesium oxide and a sulfurous gas; and the magnesium oxide is washed. | 05-19-2016 |
| 20180022617 | Recovery of Valuable Resources from Produced Water and Coal Combustion Products | 01-25-2018 |
| 423150100 | Leaching, washing, or dissolving | 15 |
| 20080274027 | Pressure Leaching System and Method - A pressure leaching system for use in a leaching operation including: at least one reaction zone for receiving a slurry of material to be leached from a slurry source, the reaction zone being disposed relative to the slurry source such that slurry is resident in the reaction zone under gravity thereby providing at least part of the pressurisation required for the leaching operation. | 11-06-2008 |
| 20100028227 | Hydrometallurgical process for nickel oxide ore - The hydrometallurgical Process for a nickel oxide ore, which is capable of preventing inevitable operation shutdown of a leaching step and maintaining high operation efficiency as a whole process, in a trouble of the steps other than the leaching step, in a hydrometallurgical Process for a nickel oxide ore using a High Pressure Acid Leach. | 02-04-2010 |
| 20100098608 | PROCESS FOR THE HYDROMETALLURGICAL TREATMENT OF A LATERITIC NICKEL/COBALT OR AND PROCESS FOR PRODUCING NICKEL AND/OR COBALT INTERMEDIATE CONCENTRATES OR COMMERCIAL PRODUCTS USING IT - Process for the treatment of a lateritic nickel/cobalt ore consisting of a mixture ( | 04-22-2010 |
| 20100135878 | Production process of sulfide containing nickel and cobalt - A production process of a sulfide containing nickel and cobalt by adding a sulfurizing agent under pressurization into an aqueous solution of sulfuric acid containing nickel and cobalt, which is capable of recovering nickel and cobalt as a sulfide in high yield, as well as enhancing the utilization efficiency of hydrogen sulfide gas. | 06-03-2010 |
| 20110116996 | PROCESS FOR NON-HEATING LEACHING NICKEL AND MAGNESIUM FROM LATERITE USING MECHANO-CHEMICAL EFFECT - A method of physicochemical leaching valuable metals is able to increase the leaching rate of nickel and magnesium contained in laterites, nickel ores, with a low concentration acid solution by using mechano-chemical effect. That is a method to add external energy to laterites containing nickel and magnesium to physically disintegrate their crystals and exposure nickels captured inside of the crystals to leach nickel and magnesium with a low concentration acid solution. It is a useful method to solve conventional problems such as the high energy cost of pyrometallurgical treatment and excessive use of strong acids of hydrometallurgical method. | 05-19-2011 |
| 20120244051 | METHOD FOR LEACHING COBALT FROM OXIDISED COBALT ORES - A method for leaching cobalt from a non-lateritic oxidised cobalt ore, the method comprising the method steps of: curing the non-lateritic oxidised cobalt ore to be leached through the application of an aqueous solution of a cobalt reducing agent selected from the group: iron (II) salts, sulfite salts, sulfur dioxide, and combinations thereof; at a pressure of between about atmospheric pressure and about 5 atmospheres, at a temperature between about 5° C. and about 65° C.; wherein the pH of the aqueous solution of the cobalt reducing agent is between about 1.0 and 10.0; and wherein the relative volumes of the aqueous solution of the cobalt reducing agent and the non-lateritic oxidised cobalt ore to be leached are such that the combination of the aqueous solution of the cobalt reducing agent and the non-lateritic oxidised cobalt ore to be leached forms a mixture with a solids content not less than about 100 g/L of aqueous solution; substantially retaining the aqueous solution of the cobalt reducing agent in contact with the non-lateritic oxidised cobalt; and leaching the cured ore at a pressure of between about atmospheric pressure and about 5 atmospheres, at a temperature between about 5° C. and about 65° C., through the application of an ammonium carbonate solution containing free ammonia thereby producing a pregnant leach solution; then passing the pregnant leach solution resulting to a means for cobalt recovery. | 09-27-2012 |
| 20130028816 | SELECTIVE BASE METALS LEACHING FROM LATERITE ORES - A process to use ferric sulphate equilibrium to reduce overall acid consumption and iron extraction, the process comprising the steps of: (i) sulphating; (ii) selective pyrolysis and (iii) selective dissolution. | 01-31-2013 |
| 20140205520 | LEACHING OF MINERALS AND SEQUESTRATION OF CO2 - A method for leaching of minerals and sequestration of CO | 07-24-2014 |
| 20150044112 | METHOD FOR OPERATING FLASH VESSEL - The present invention is such that, with H1 being the height from a slurry outlet to a control liquid level, H2 being the height from the control liquid level to the top of a flash vessel, and being the diameter of the flash vessel, 0.35D≦H1≦0.45D, and 0.75D≦H2≦0.85D, and at least one liquid level sensor detects a slurry liquid surface at a control liquid level; when the liquid level sensor detects a slurry liquid surface which has risen, a slurry discharge valve installed on a slurry discharge pipe derived from the flash vessel is opened; and when the liquid level sensor detects a slurry liquid surface which has fallen, the slurry discharge valve is closed, whereby opening and closing of the valve is appropriately controlled thereby to reduce troubles with a steam discharge pipe, the slurry discharge pipe, and the slurry discharge valve. | 02-12-2015 |
| 20150050200 | PRODUCTION METHOD FOR HEMATITE FOR IRON PRODUCTION - Provided is a production method for refining iron oxide (hematite), which has such a low sulfur content as to be used as a raw material for ironmaking from a leach residue containing iron oxide, the leach residue being produced by a high pressure acid leach (HPAL) process and being a raw material that can be cheaply and stably procured. In the method of producing (high purity) hematite for ironmaking by a process of adding an oxidant and sulfuric acid to nickel oxide ore and then leaching nickel, a leach residue obtained after the leaching of nickel is heated to 600° C. or more, and preferably 800° C. or more and 1400° C. or less. | 02-19-2015 |
| 20150050201 | METHOD FOR PRODUCING HEMATITE FOR IRONMAKING - Provided is a production method for refining iron oxide (hematite), which has such a low sulfur content as to be used as an iron-making raw material, from a leach residue containing iron oxide produced by a high pressure acid leach (HPAL) process. In the method for refining iron oxide for ironmaking by a process of adding sulfuric acid to nickel oxide ore and then leaching nickel from the nickel oxide ore using a pressure vessel, an amount of the sulfuric acid added is 150 kg or more and 220 kg or less per ton of nickel oxide ore. | 02-19-2015 |
| 20150086450 | METHOD FOR ADDING STARTING MATERIAL SLURRY AND SULFURIC ACID TO AUTOCLAVE IN HIGH PRESSURE ACID LEACHING PROCESS AND AUTOCLAVE - In an autoclave in a high pressure acid leaching process in which starting material slurry and sulfuric acid are stirred by stirring machines in each compartment in the autoclave partitioned by partition walls to proceed leaching, and slurry is transferred from a compartment on an upstream side to a compartment on a downstream side to sequentially proceed leaching, wherein starting material slurry supply tubes having the starting material slurry discharge ports and sulfuric acid supply tubes having sulfuric acid discharge ports are alternately disposed on a perimeter of stirring blades of the stirring machine provided in the compartment at an upstream end, and the starting material slurry and sulfuric acid are added to the compartment at the upstream end from the starting material slurry discharge ports and the sulfuric acid discharge ports positioned higher than an uppermost part of the stirring blades and lower than a contained liquid surface. | 03-26-2015 |
| 20160049700 | METHOD FOR REMOVING COPPER AND ALUMINUM FROM AN ELECTRODE MATERIAL, AND PROCESS FOR RECYCLING ELECTRODE MATERIAL FROM WASTE LITHIUM-ION BATTERIES - The present invention provides a method for removing copper and aluminum from an electrode material and a process for recycling electrode material from waste lithium-ion batteries. The method for removing copper and aluminum from the electrode material comprises: subjecting the electrode material containing electrode active material, copper and aluminum to reaction with an aqueous solution, wherein the aqueous solution has a pH value of higher than 10, and comprises base, oxidizing agent and complexing agent. The process for recycling electrode material from waste lithium-ion batteries comprises: a) harvesting an electrode material containing electrode active material, copper and aluminum from waste lithium-ion batteries; b) removing copper and aluminum from the electrode material according to the foresaid method; and c) further purifying and regenerating the electrode active material for reuse in new lithium-ion batteries. The present invention thus provides a practical and efficient method for recycling active materials from waste lithium-ion batteries. | 02-18-2016 |
| 423150300 | Treatment of iron containing waste mixture | 1 |
| 20140348733 | CONTINUOUS FE(III) PRODUCTION AT ATMOSPHERIC PRESSURES - A method oxidizes ferrous iron to ferric iron. The method includes providing a liquid, which includes the ferrous iron, and a gas, which includes an oxidizing agent, such as oxygen and/or chlorine; providing two separate mixes, with both mixes including the gas and the liquid; and colliding the separate mixes, thereby obtaining the ferric iron. | 11-27-2014 |
| 423150400 | Treatment of matte or nodule | 1 |
| 20110058998 | Recovering Metal Values from a Metalliferrous Material - There is provided a method of treating a metalliferrous material, comprising providing a metalliferrous material including at least one target metallic element, solubilising the metalliferrous material so as to effect production of an intermediate product including an operative solution. The operative solution includes a solvent component and a solute component. The solute component includes at least one solute component-based target metallic element and each one of the at least one solute component-based target metallic element corresponds to a one of the at least one target metallic element of the metalliferrous material such that the operative solution includes at least one target metallic element. The operative solution is contacted with an operative reagent in an operative reaction zone so as to effect production of a product mixture including an operative reaction product and hydronium ion, wherein the operative reaction product includes at least one operative reaction product-based target metallic element and each one of the at least one operative reaction product-based target metallic element corresponds to a one of the at least one solute component-based target metallic element of the operative solution. At least one hydronium ion depletion agent is provided in the operative reaction zone such that contacting between any one of the at least one hydronium ion depletion agent and the hydronium ion in the operative reaction zone effects a reactive process which consumes the hydronium ion. Each one of the at least one hydronium ion depletion agent include s at least one dissolved aluminium complex material. | 03-10-2011 |
| 423151000 | Converting metal to magnetic form | 1 |
| 423152000 | At specified temperature | 1 |
| 20140356263 | METHOD FOR PRODUCING HIGH-PURITY SYNTHETIC MANETITE BY OXIDATION FROM METAL WASTE AND APPLIANCE FOR PRODUCING SAME - The invention relates to a method for producing magnetite with a purity of no less than 90% and higher than 98%, by oxidation of pulverized wustita (iron oxide), at temperatures ranging from 200° C. to 800° C., with the addition of water in liquid or steam form, in counter-current or concurrently, in an externally heated reaction chamber with a controlled atmosphere. The amount of water used to oxidize the wustita being 60 to 500 ml per kilogram of wustita, the grains of wustita powder injected into the reaction chamber having a size no greater than 100 μm for optimal reaction. | 12-04-2014 |
