| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 075743000 |
With leaching or dissolving
| 175 |
| 075739000 |
Utilizing chemical agent to precipitate free metal
| 15 |
| 075721000 |
Utilizing organic reducing agent
| 9 |
| 075722000 |
Involving organic compound containing metal or organic agent for agglomerating metal | 4 |
| 20150135903 | PROCESSES FOR RECOVERING METALS FROM AQUEOUS SOLUTIONS - Provided herein are processes for recovering metal present at low concentration from an acidic aqueous solution, including contacting the acidic aqueous solution with an organic phase solution including one or more 5-(C | 05-21-2015 |
| 20100206134 | METHOD FOR RECOVERY - A method is provided for recovering metals from a spent catalyst composition containing an organic contaminant and catalytically active metals on a catalyst support. The metals are leached from the spent catalyst composition by adding under stirring an ionic liquid. The ionic liquid containing the leached metals is separated from the organic contaminant and the catalyst support by adding under stirring an anti-solvent. After removing the organic contaminant and the catalyst support, the leached metals are separated from the ionic liquid for example by selective precipitation, ion exchange, solvent extraction, electrodeposition, chromatographic, or pyrometallurgical methods. | 08-19-2010 |
| 20120118110 | METHODS AND SYSTEMS FOR LEACHING A METAL-BEARING ORE FOR THE RECOVERY OF A METAL VALUE - A system and method for recovering a metal value from a metal-bearing ore material are provided. A metal-bearing ore can be mixed with certain substances and to form an agglomerated ore. In an intermediate state, between agglomeration and heap formation, bacteria can be added to the metal-bearing ore material to produce an augmented ore. The augmented ore can then be formed into a heap. | 05-17-2012 |
| 20150315670 | METHOD FOR METAL CONCENTRATION, METHOD FOR METAL RECOVERY, DEVICE FOR METAL CONCENTRATION, AND DEVICE FOR METAL RECOVERY - An objective of invention is conveniently concentrating a metal in a metal ion-containing solution with high efficiency and to recover the metal from the metal ion-containing solution with high recovery efficiency. A method for concentrating or recovering a metal in a metal ion-containing solution in the present invention is the method comprising the following steps, a reduction and accumulation step to reduce the metal ion into a metal fine particle and also to accumulate the metal fine particle in the microorganism by allowing the microorganism and an electron donor B to act on a metal ion-containing solution W | 11-05-2015 |
| 075715000 |
Removing coating to recover free metal from substrate or coating | 3 |
| 20110138966 | Method of detinning Sn plating layer on Cu-based material - A Cu-based material 5 is immersed into an alkali hydroxide solution with a concentration of 3.0 to 37.5 mass % and a H | 06-16-2011 |
| 20140165786 | METHOD FOR THE REMOVAL AND RECOVERY OF METALS AND PRECIOUS METALS FROM SUBSTRATES - A method for removing metal and/or precious metal-containing depositions from substrates, wherein said substrate is subjected to treatment with an organo amine protectant component P and an inorganic active component A. Component P may be formed in situ by reaction with component R. Component P is an organic amine and/or organic amine hydrochloride (preferably diisopropylamine hydrochloride), component A is an inorganic compound (preferably inorganic acid or a mixture thereof) and component R is an organic compound that can be split along the C- N bond by the component A into an organic amine (preferably di-methylformamide or N-methyl pyrrolidone). The metals in the form of organo-metallic complexes can be isolated and/or separated by means of different chemical reactions (preferably reduction reactions) and/or biosorption (preferably with seaweed or yeast). | 06-19-2014 |
| 20150114182 | GOLD RECOVERY - The cost of precious metals, such as gold, makes recovery or recycling of these materials economically viable and desirable. Disclosed herein is a method of recovering gold from waste sources thereof, in particular waste electrical goods. Also disclosed herein is an apparatus for recovering gold from said waste sources. In particular, disclosed herein is a method and apparatus in which gold leaching chlorine gas is generated externally to a reactor vessel and subsequently pumped into the reactor vessel comprising the waste gold materials. | 04-30-2015 |
| 075714000 |
From electrolytic or cementation slime | 3 |
| 20100294082 | Method for Collection of Valuable Metal from ITO Scrap - Proposed is a method for collecting valuable metal from an ITO scrap including a step of collecting tin by subjecting the ITO scrap to electrolysis. Further proposed is a method for collecting valuable metal from an ITO scrap including the steps of providing an ITO electrolytic bath and a tin collecting bath, dissolving the ITO scrap in the electrolytic bath, and thereafter collecting tin in the tin collecting bath. Additionally proposed is a method for collecting valuable metal from an ITO scrap including the steps of dissolving the ITO scrap by subjecting it to electrolysis as an anode in electrolyte, precipitating only tin contained in the solution as tin itself or a substance containing tin, extracting the precipitate, placing it in a collecting bath, re-dissolving this to obtain a solution of tin hydroxide, and performing electrolysis or neutralization thereto in order to collect tin. Consequently, provided is a method for efficiently collecting tin from an ITO scrap of an indium-tin oxide (ITO) sputtering target or an ITO scrap such as ITO mill ends arising during the manufacture of such ITO sputtering target. | 11-25-2010 |
| 20130139649 | METHYLENE AMINOETHYL SULFONIC ACID CHELATING RESINS - The present invention relates to chelating resins containing methyleneaminoethylsulfonic acid groups, a process for producing them and also their use for removing heavy metals or metals of value from aqueous solutions having a pH of <4, preferably from process water in or from the electronics industry, the electroplating industry or the mining industry. | 06-06-2013 |
| 20130152741 | SYSTEM AND METHOD INCLUDING MULTI-CIRCUIT SOLUTION EXTRACTION FOR RECOVERY OF METAL VALUES FROM METAL-BEARING MATERIALS - The present disclosure relates to a metal recovery process comprising a solvent extraction process. In an exemplary embodiment, the solution extraction system comprises a plant with a first and second circuit. A high-grade pregnant leach solution (“HGPLS”) is provided to the first and second circuit, and a low-grade pregnant leach solution (“LGPLS”) is provided to the second circuit. The first circuit produces a rich electrolyte, which can be forwarded to a primary metal recovery, and a low-grade raffinate, which can be forwarded to a secondary metal recovery process. The second circuit produces a rich electrolyte, which can also be forwarded to the primary metal recovery process. The first and second circuits are in fluid communication with each other. | 06-20-2013 |
| 075712000 |
Involving mining or in situ operation | 2 |
| 20090320648 | RECOVERY OF MOLYBDENUM FROM MOLYBDENUM BEARING SULFIDE MATERIALS BY BIOLEACHING IN THE PRESENCE OF IRON - The invention relates to a method of recovering molybdenum from a molybdenum bearing sulfide material. The material is contacted with a leaching solution in the presence of iron compounds and mesophilic or thermophilic iron oxidizing microorganisms and subsequently, a leaching process is performed by controlling the molar ratio of dissolved ferric iron to dissolved molybdenum. Preferably, a high amount and molar excess of dissolved iron is used. The presence of high concentrations of ferric iron in bioleach solutions allows iron-oxidizing microorganisms to grow and oxidize iron and bioleach molybdenite at dissolved Mo concentrations as high as 4.4 g/L. Organic metabolites were not required for protecting cells from Mo toxicity. Maximum dissolution rates depend on reactor configuration, with agglomerated material simulating heap leaching of almost 1% Mo/day, but up to 10.2% Mo/day in suspension/stirred reactor configurations, with rate highly dependent on temperature within the range of 25° C. to 40° C. The ultimate extent of Mo removal from the molybdenum bearing sulfide material is 89%. Finally, molybdenum is recovered from a leach residue of the leaching process. | 12-31-2009 |
| 20130199340 | LIQUID INJECTION PROCESS FOR IN-SITU LEACHING AND EXTRACTING ION-ADSORPTION TYPE RARE EARTH ELEMENTS - A liquid injection process for in-situ leaching and extracting an ion-adsorption type rare earth including: setting up a liquid injection network having liquid injection shallow wells and liquid injection deep wells, inputting a leaching agent into the injection shallow wells, then inputting the leaching agent into the deep wells, and finally inputting a pushing water into all of the wells. This process is characterized by a high rare earth mineral-leaching rate, a high mother liquid concentration, a small residue of the mother liquid of the ore earth, a small unit consumption of the leaching agent, simple operation, wide application, and outstanding environmental protection effect. Additionally, the process also can cancel any blind area in mineral leaching, increase stability of side slope in the liquid injection process, and control a flow direction, a flow rate of the leaching agent, and a liquid injection intensity. | 08-08-2013 |
| 075717000 |
Reducing to free metal with gas | 2 |
| 20090158894 | METHOD FOR RECOVERING GOLD - The invention relates to a method for recovering gold in connection with the hydrometallurgical production of copper from a waste or intermediate product containing sulphur and iron that is generated in the leaching of the copper raw material. The recovery of both copper and gold occurs in a chloride environment. The gold contained in the waste or intermediate is leached by means of divalent copper, oxygen and alkali bromide in a solution of copper (II) chloride and alkali chloride, in conditions where the oxygen-reduction potential is a maximum of 650 mV and the pH a minimum of 0.5. The bromide accelerates the dissolution of the gold. | 06-25-2009 |
| 20160115569 | METHOD FOR SYNTHESIZING A RARE EARTH ELEMENT BY REDOX REACTION - A method for synthesising a rare earth element by a redox reaction. The starting material side of the reaction for synthesising the rare earth element includes a rare earth compound, in which the rare earth element is present in a positive oxidation state, and hydrogen. The redox reaction takes place in two stages. First, a hydration reaction takes place between an elementary rare earth element and hydrogen to form a rare earth hydride. Then, a reaction takes place between the rare earth compound and the rare earth hydride. An elementary rare earth element and a hydrogen-containing compound are produced at the same time as the product of the reaction. | 04-28-2016 |
| 075724000 |
Displacing by another metal (i.e., electromotive series) | 2 |
| 20110056331 | LEACHING PROCESS FOR COPPER CONCENTRATES CONTAINING ARSENIC AND ANTIMONY COMPOUNDS - A method of recovering copper from a copper sulfide concentrate comprising a copper arsenic sulfosalt or a copper antimony sulfosalt, using pyrite as a catalyst. The concentrate and pyrite are added to an acidic sulfate leach solution. The copper is leached from the concentrate, in the presence of an oxygen-containing gas, under conditions whereby the pyrite is substantially unoxidized. The pyrite:copper sulfide ratio of the pyrite being added to the copper sulfide present in the concentrate being added is at least 1:3. The pyrite may be maintained at a concentration in the leach solution of at least 9 grams per liter. The leached copper is recovered from the solution by conventional methods. | 03-10-2011 |
| 20110030508 | Process for Metal Seperation Using Resin-in-Pulp or Resin-in-Solution Processes - A process for the treatment of solutions or slurries containing dissolved metals comprises the steps of (a) contacting the solution or slurry with an ion exchange resin that selectively removes one or more dissolved metals from the solution or slurry wherein the solution or slurry and the resin are introduced into a vessel or column via sub-surface means, (b) separating loaded resin from the solution or slurry, (c) eluting the one or more metals from the loaded resin with an eluting agent, (d) separating the eluting solution containing eluted metal ions from the resin; and (e) transferring regenerated resin from step (d) back to step (a). | 02-10-2011 |
| Entries |
| Document | Title | Date |
|---|
| 20090158893 | MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY GOLD ORES - The present invention is directed to recovery of gold from refractory and double refractory ores using a fungal agent and/or culture media. | 06-25-2009 |
| 20090165598 | NOVEL PHOSPHINIC ACIDS AND THEIR SULFUR DERIVATIVES AND METHODS FOR THEIR PREPARATION - The present invention provides phosphinic acids and their sulfur derivatives, in accordance with the following formula (I): wherein R | 07-02-2009 |
| 20090272229 | CHEMICAL PROCESS FOR RECOVERY OF METALS CONTAINED IN INDUSTRIAL STEELWORKS WASTE - This invention provides chemical processes for the treatment of industrial steelworks waste, especially those from an electric arc furnace, called “flue dust,” to allow for the subsequent recovery of metals (e.g. zinc and iron) from the dust. The main purposes of the process are: (i) the opening of the crystalline webs (zinc ferrite) originally formed in the flue dust, with the simultaneous production of soluble sulfates in aqueous medium; (ii) and the destruction of possible dioxins without subsequent regeneration. The processes encompass production of salts or sulfates of the metals in the flue dust, utilizing concentrated sulfuric acid and reagents or catalysts by dry medium, at normal pressure and moderate temperatures. The processes promotes reaction of sulfuric acid with elements found in the flue dust to maintain a homogenous mixture without the presence of water, and prevent agglomeration of the particles through the addition of secondary reagents and catalysts. | 11-05-2009 |
| 20090277305 | RECOVERY OF RHENIUM - The present invention relates to a method for recovering rhenium from an ethylene oxide catalyst containing rhenium and at least silver on a solid support, wherein at least a substantial portion of the rhenium present in the catalyst is extracted by intimate contact of the catalyst with one or more polar non-acidic organic solvents substantially free of water such that a rhenium-containing solution is formed containing the polar non-acidic organic solvent and extracted rhenium, the polar non-acidic organic solvent containing one or more oxygen, nitrogen, and/or halogen atoms in its molecular structure. | 11-12-2009 |
| 20100058893 | ION EXCHANGE RESIN AND A PROCESS FOR THE USE THEREOF - The present invention relates to a resin which is a copolymer of a polystyrene and a non-styrenic polymer, wherein the non-styrenic polymer includes the following subunit: Formula (I) wherein R | 03-11-2010 |
| 20100224029 | METHOD FOR SEPARATION AND RECOVERY OF NOBLE METALS - A method for separation and recovery of noble metals which makes it possible to isolate noble metal components efficiently by easy operation, that is, a method which comprises passing a solution of metals in hydrochloric acid prepared by treating a metal material with hydrochloric acid through the first cellulose column, eluting through development the noble metal component adsorbed on the cellulose with a hydrochloric acid/2-propanone mixture to obtain a fraction containing light platinum-group metals and a fraction containing heavy platinum-group metals and gold, separating the former fraction with the above mixture into fractions containing palladium, ruthenium and rhodium respectively, passing the fraction containing heavy platinum-group metals and gold through the second cellulose column to made them adsorbed on the cellulose, eluting them from the cellulose with a hydrochloric acid/1-butanol mixture to obtain fractions containing gold, osmium, iridium and platinum respectively, and recovering the noble metals from the fractions containing them respectively as simple substances. | 09-09-2010 |
| 20100224030 | INDIUM RECOVERY BY SUPPORTED LIQUID MEMBRANE WITH STRIP DISPERSION - The present invention provides a process for the removal and recovery of indium from waste waters and process streams. The process of the present invention utilizes a combination of a supported liquid membrane (SLM) and a strip dispersion to improve extraction of indium while increasing membrane stability and decreasing processing costs. This novel process selectively removes indium from the feed stream, provides the increased flexibility of aqueous strip/organic volume ratio, and produces a concentrated strip solution of indium. | 09-09-2010 |
| 20100294081 | METHOD AND APPARATUS FOR REMOVING AND RECOVERING COPPER FROM COPPER-CONTAINING ACIDIC WASTE LIQUID AND METHOD FOR PRODUCING COPPER-CONTAINING SUBSTANCE - The present invention relates to a method and apparatus for removing and recovering copper by treating an acidic waste liquid containing copper ions such as an etching waste liquid resulting from etching a copper printed board in an etching solution of cupric chloride and a waste liquid after renewing a plating bath liquid in producing electrolytic copper foil. | 11-25-2010 |
| 20110011214 | SEPARATION OF FINE PARTICLE PRECIOUS METALS FROM CLAYS AND OTHER GANGUE MATERIALS THROUGH APPLICATION OF DILUTED SOLUTION OF A SILICON CHEMICAL - The present invention generally relates to a formulation created by reacting sodium hydroxide, water, and silicon metal which has unique properties and many uses. The present invention further relates to the separation of fine particle gold and other precious metals from clays and other gangue materials through application of a diluted solution of a silicon chemical. The present invention further relates to the use of the diluted solution of the silicon chemical with vibration tables, concentrators, wash towers, hydro-cyclones and centrifuges and the like to aid in the separation of fine particle gold and other precious metals from clays and other gangue materials. | 01-20-2011 |
| 20110011215 | RARE METAL EXTRACTANT - The present invention is to provide a novel rare metal extractant containing a cyclic phenol sulfide derivative of the formula (1) and a method for extractive separation of rare metal(s) using the rare metal extractant with high efficiency. | 01-20-2011 |
| 20110017022 | METHOD OF RECOVERING METAL - A metal storage material, containing a perovskite-type composite oxide of formula (1), which is a material to stores a metal component of a metal-containing material: | 01-27-2011 |
| 20110072937 | METHOD FOR SEPARATING ZINC, IRON, CALCIUM, COPPER AND MANGANESE FROM THE AQUEOUS SOLUTIONS OF COBALT AND/OR NICKEL - The invention relates to a method for separating the impurities zinc, iron, calcium, copper and/or manganese from aqueous solutions that contain cobalt and/or nickel. An aqueous solution ( | 03-31-2011 |
| 20110088513 | METHOD FOR SOLUBILIZING MOLYBDENUM OXIDE CONCENTRATES - A process for digesting molybdenum oxide concentrates includes suspending a molybdenum-containing starting material in an aqueous solution so as to obtain a suspension. While stirring, an oxidizing agent and an alkali solution of at least one alkali metal are metered to the suspension so as to set a pH and produce a product having a molybdenum content of at least 98% of the molybdenum-containing starting material. The alkali metal is selected from the group consisting of Na, K and Li. | 04-21-2011 |
| 20110120267 | Iron Precipitation - A process for the treatment of a solution containing at least ferric ions, and one or more metal values, said process including the step of maintaining a controlled concentration of ferric ions in solution for a sufficient residence time to control iron hydroxide or oxide crystal growth, and precipitating the iron as a relatively crystalline iron hydroxide or oxide while minimising the loss of the ore or more metal values with the iron hydroxide or oxide. | 05-26-2011 |
| 20110271796 | METHOD FOR THE SELECTIVE ACIDIC DEZINCIFICATION OF STEEL SCRAP - The invention claims a method for the selective acidic dezincing of steel scrap. The selective complete dezincing is achieved by the addition of oils, whereupon the dissolution of iron being substantially suppressed through the autogenous inhibition effect of the oils. The steel scrap arising when the dezincing process has been completed is protected against corrosion by the remaining film of oil, said corrosion protection preventing the formation of iron oxide layers and thus blackening of the scrap material. The oil discharged with the dezincing solution can be separated as a pure phase by resorting to flotation in support of the process and can then be reused as inhibitor. | 11-10-2011 |
| 20110290077 | Process for Separating Copper and/or Nickel from Cobalt Containing Solutions - The present invention relates to an improved process for the separating of copper and/or nickel from solutions containing cobalt. | 12-01-2011 |
| 20110308355 | Adsorption agent for noble metal, method for manufacturing the same, and method for recovering noble metal - A noble metal adsorption agent includes algae or residue of algae having an amino group as a functional group. A noble metal is retrieved by a method including: adsorbing the noble metal on the noble metal adsorption agent; and retrieving the noble metal. The noble metal is solved in a liquid. Thus, by using the noble metal adsorption agent, the noble metal is selectively retrieved. | 12-22-2011 |
| 20110314967 | IMPROVING THE RECOVERY OF PRECIOUS METALS FROM RECALCITRANT REFRACTORY ORE - The invention provides a novel process for improving the recovery of precious metals from recalcitrant refractory ores by the use of hydrofluoric acid dissolved in ionic liquids. The solution of hydrogen fluoride gas in an ionic liquid is contacted with dry crushed ore at a temperature and for a period of time commensurate with the fracturing of a specific recalcitrant refractory ore. The excess ionic liquid is separated from the ore and the fractured ore is further treated with dilute sodium cyanide solution to extract precious metals in greater yields. | 12-29-2011 |
| 20120011967 | METALS RECOVERY FROM MINING HEAP LEACH ORE - There is provided a metals recovery system including at least one tank having a top portion and a bottom portion, wherein the top portion has an inlet and said bottom portion has an outlet, a process fluid delivery device in fluid communication with the tank for delivering a supply of process fluid to the tank, an ore delivery device for delivering a supply of ore into the tank through the inlet in the top portion of the tank, an agitator located within the tank for disrupting a downward flow path of the ore through the tank and an ejection device in communication with the bottom of the tank for transporting process fluid and ore from the tank to a location apart from the tank. Also provided is a method of recovering metal from ore by supplying a constant head pressure of process fluid to at least one tank, distributing ore into the tank, disrupting the flow of ore through the tank and discharging the ore and process fluid from the tank an into a processing apparatus. | 01-19-2012 |
| 20120067173 | PROCESS FOR LIBERATING METALS USING DIRECT PRODUCTION OF LEACH GRADE ACID SOLUTIONS - A system which uses available waste acid process streams from hydrometallurgical extraction processes as absorption media for the direct production of leach grade acid solutions for return to the hydrometallurgical processing circuit for use in liberating metals from metal-bearing materials. The produced acid may have a concentration in the range suitable for processing of metal-bearing materials | 03-22-2012 |
| 20120067174 | PROCESSES FOR EXTRACTION OF NICKEL WITH IRON-COMPLEXING AGENT - The invention provides, in part, a process for extracting nickel from a source material including iron and nickel, by contacting the source material (e.g, an ultramafic ore) with an aqueous ammonia solution containing an iron-complexing agent (e.g., citrate) under suitable conditions, thereby extracting the nickel. The aqueous ammonia solution may optionally contain a sulfur-containing reductant, such as thiosulfate. | 03-22-2012 |
| 20120118109 | PHENOXYPYRAZOLE COMPOSITION AND PROCESS FOR THE SOLVENT EXTRACTION OF METALS - Methods for extracting metals from aqueous solutions, by contacting an aqueous solution containing a dissolved metal with a solvent extraction composition having a water-immiscible organic solvent; and a metal extractant compound according to Formula (1) | 05-17-2012 |
| 20120152063 | RHENIUM RECOVERY - Method for rhenium recovery from copper solvent extraction solution. It is determined whether the copper solvent extraction solution contains trace amounts of rhenium. If so, a feedstock from the copper solvent extraction solution is provided, which is then filtered, producing filtered feedstock. Trace amounts of rhenium are absorbed from the filtered feedstock using a supply of ion exchange resin selective for rhenium. The ion exchange resin is washed. Trace amounts of rhenium are eluted from the ion exchange resin using a first amount of eluent, a second amount of eluent and a third amount of eluent. The first amount and the third amount of eluent produce supplemental feedstock and the second amount of eluent produces rhenium eluate. The rhenium eluate is collected and the ion exchange resin is protonated. | 06-21-2012 |
| 20130014611 | METHOD FOR RECOVERING TANTALUMAANM Yoshida; MamiAACI Ageo-shiAACO JPAAGP Yoshida; Mami Ageo-shi JPAANM Matsuzaki; KenjiAACI Ageo-shiAACO JPAAGP Matsuzaki; Kenji Ageo-shi JPAANM Aoki; TatsuyaAACI Ageo-shiAACO JPAAGP Aoki; Tatsuya Ageo-shi JPAANM Ishii; RintaroAACI Ageo-shiAACO JPAAGP Ishii; Rintaro Ageo-shi JP - The present invention provides a technology for recovering high-content tantalum from tantalum-containing waste with reducing various impurities such as antimony (Sb) and phosphorus (P) which hinder reuse of the tantalum in tantalum capacitors. The method for recovering tantalum from tantalum-containing waste according to the present invention is characterized in that tantalum-containing waste is subjected to an acid treatment and then to an alkali treatment, thereby recovering tantalum. The acid treatment is preferably performed with use of an acid containing hydrochloric acid and the alkali treatment is preferably performed with use of sodium hydroxide or potassium hydroxide. The tantalum-containing waste in the present invention is preferably a tantalum sintered compact collected from a tantalum capacitor. | 01-17-2013 |
| 20130036870 | METHOD FOR COLLECTING Co FROM URBAN ORE - Urban ore is a mixture of a lot of metallic elements, and these metallic elements need to be separately collected therefrom. However, because the content of each metallic element is very small, it has been extremely difficult to selectively collect the required metallic element. | 02-14-2013 |
| 20130055855 | GALLIUM-68 PURIFICATION - A method is described for obtaining purified | 03-07-2013 |
| 20130276586 | METHODS AND SYSTEMS FOR RECOVERING RHENIUM FROM A COPPER LEACH - Various embodiments provide new methods of rhenium recovery. The methods can include subjecting a metal-bearing solution to an activated carbon bed, and adsorbing rhenium onto the activated carbon. The methods can also include heating a basic aqueous elution solution and eluting the rhenium from the activated carbon with the heated elution solution. | 10-24-2013 |
| 20130319178 | PROCESS FOR SEPARATING AT LEAST ONE PLATINOID ELEMENT FROM AN ACIDIC AQUEOUS SOLUTION COMPRISING, BESIDES THIS PLATINOID ELEMENT, ONE OR MORE OTHER CHEMICAL ELEMENTS - The invention relates to a process for recovering at least one platinoid element contained in an acidic aqueous solution comprising chemical elements other than said platinoid element, said process comprising the following steps:
| 12-05-2013 |
| 20140026715 | PROCESS FOR PROVIDING NOBLE METAL-CONTAINING MIXTURES FOR RECOVERING NOBLE METALS - The invention relates to the provision of noble metal-containing mixtures for a process for processing them by heating the mixture, preferably for processing them by means of an ashing process. This provision is characterized by the following measures: (a) moistening of the noble metal-containing mixture to be processed, (b) introduction of the moistened noble metal-containing mixture into at least one container which serves as diffusion barrier for water, and (c) introduction of the loaded container into a heat-resistant chamber together with at least one upper refractory mat. The noble metal-containing mixture is preferably moistened in the presence of a porous material and the chamber is closed by means of a heat-resistant covering. The invention further provides a processing process comprising the provision of noble metal-containing mixtures and also the heat-resistant chamber loaded with noble metal-containing mixtures itself. The process of the invention enables simple, clean recovery of noble metals in high yield from noble metal-containing mixtures. | 01-30-2014 |
| 20140109725 | Process for the Recovery of Gold from Anode Slimes - A process for the recovery of gold from a gold-bearing aqueous filtrate, the process comprising the steps of:
| 04-24-2014 |
| 20150033913 | METHOD AND SYSTEM FOR GOLD RECOVERY - A method for recovering precious metal from an acidic pregnant solution resulting from halogen or hypohalite leaching of an ore, comprising lowering the ORP of the pregnant leachate with a reducing agent in the presence of slurried non-carboneous particles. The precious metal deposits on the surfaces of the particles and a barren solution comprising substantially all the halogen values of the pregnant solution in the form of sodium chloride, sodium bromide or hypohalites is recovered. | 02-05-2015 |
| 20150047469 | Method for Recovering Rare Earth from Rare Earth Element-Containing Alloy - A method for recovering a rare earth element from a rare earth element-containing alloy, wherein a rare earth element is eluted by performing electrolysis in an electrolyte which contains a metal powder of a rare earth element-containing alloy. An object of this invention is to provide a method for extremely easily and efficiently recovering a rare earth element. | 02-19-2015 |
| 20150114181 | METHOD FOR PRODUCING AQUEOUS SOLUTION OF PERRHENIC ACID FROM RHENIUM SULFIDE - A method for allowing production of high-purity perrhenic acid from crude rhenium sulfide by applying a dry process is provided. A method for producing an aqueous solution of perrhenic acid includes 1) a step for roasting rhenium sulfide under an oxygen-containing gas to collect gasified rhenium oxide; 2) a step for cooling and solidifying the gasified rhenium oxide while keeping sulfur oxide entrained in the gasified rhenium oxide a gaseous state, and subsequently performing solid-gas separation, thereby improving purity of rhenium oxide; and 3) a step for dissolving the solidified rhenium oxide into water, or heating and gasifying the solidified rhenium oxide and then dissolving the gasified rhenium oxide into water, to obtain the aqueous solution of perrhenic acid. | 04-30-2015 |
| 20150292058 | METHOD FOR RECOVERING INDIUM FROM INDIUM CONTAINING SOLUTION OR MIXTURE - The present invention relates to a method for recovering indium in a high selectivity and a high efficiency from an indium-containing solution, dispersion or mixture such as seawater, industrial water, waste water, cooling water, a solution extracted from wastes of electronic products such as display panel, or the like. | 10-15-2015 |
| 20150299821 | MIXING METHOD AND DEVICE FOR SOLVENT EXTRACTION, ESPECIALLY IN HYDROMETALLURGICAL PROCESSES - A system and method are disclosed for mixing a suspension. The suspension may optionally have a low liquid viscosity. The suspension may, optionally, include a metallurgy solvent extraction (SX) mixture. The system and method may be at an industrial scale. In some embodiments, suspension may be stirred at high energy dissipation rate with a large impeller. The system may optionally include baffles. The impellor and/or the baffles may optionally include a rounded edge. The method may be applied to retrofitting a SX plant. The input feed to a mixing reactor may include an emulsion and/or multiple discrete phases. | 10-22-2015 |
| 20160024616 | A method for re-extraction of rare-earth metals from organic solutions and preparing concentrate of rare-earth metals - The present invention relates to a method for recovery of rare earth metals (REM) from diluted aqueous acidic solutions comprising steps of liquid-phase extraction of REM into an organic phase and re-extraction of REM from the organic phase. The re-extraction is carried out by precipitation of REM as a solid phase in the form of a poorly soluble salt of a strong acid (pK | 01-28-2016 |
| 20160032419 | METHOD FOR SELECTIVELY RECOVERING THE RARE EARTHS FROM AN AQUEOUS ACID SULFATE SOLUTION RICH IN ALUMINUM AND PHOSPHATES - The present invention relates to a process for the selective recovery of the rare earth metals from an acidic aqueous sulfate solution comprising phosphates, aluminum and heavy rare earth metals, and possibly medium rare earth metals, iron(II) and titanium, characterized in that it comprises the following successive stages: a) neutralization at a pH of between 3 and 4 of an acidic aqueous sulfate solution comprising phosphates, aluminum and heavy rare earth metals, and possibly medium rare earth metals, iron(II) and titanium, the solution having a molar ratio Al/P>1 and a concentration of sulfates>100 g/l, by addition of a base, so as to precipitate the phosphate and the aluminum and the possible titanium, b) liquid/solid separation between the precipitate formed by the phosphate and the aluminum and the possible titanium and the aqueous sulfate solution, c) recovery of the aqueous sulfate solution, d) addition of phosphates to the aqueous sulfate solution obtained in stage c) such that the molar ratio of the solution obtained PO | 02-04-2016 |
| 20160047012 | EXTRACTION AGENT FOR PRECIOUS METALS AND RHENIUM, AND EXTRACTION METHOD FOR PRECIOUS METALS AND RHENIUM USING SAME - The present invention extracts precious metals from an acidic solution containing precious metals in an early and highly efficient manner. Provided is an extraction agent for precious metals that is represented by the general formula below. In the formula, R1 and R2 each represent the same alkyl group or different alkyl groups, R3 represents a hydrogen atom or an alkyl group, and R4 represents a hydrogen atom or a discretionary group that is not an amino group and that bonds to α carbon as an amino acid. By subjecting an acidic solution containing precious metals to solvent extraction using the extraction agent for precious metals, a plurality of precious metals can be recovered all at once from a solution containing a large amount of various impurities. | 02-18-2016 |
| 20160053344 | SULFONAMIDE-BASED SEPARATION MEDIA FOR RARE EARTH ELEMENT SEPARATIONS - A sulfonamide based rare earth element ion separation media and method of synthesis and use are provided. A bed or column of sulfonamide resin for separations can be prepared by exposing a sulfonate resin to chlorosulfonic acid to form a sulfonyl chloride resin; exposing the sulfonyl chloride resin to aqueous ammonia to form a sulfonamide resin; and then packing the sulfonamide resin into a separation column. Mixtures of lanthanide and other rare earth ions with very similar atomic radii and characteristics can be separated by flowing a mixture of lanthanide ions through a bed of sulfonamide resin followed by a mobile phase of an organic acid such as lactic acid to elute the separated rare earth element ions separated by the sulfonamide resin. Collected fractions of eluate can also be recycled through the sulfonamide media. | 02-25-2016 |
| 20160376680 | PROCESSING AND APPLICATION OF A PURIFICATION SYSTEM FOR GOLD MINING, EXTRACTION OF MINERALS AND GROWTH OF ALGAE BIOMASS - The present disclosure describes a process for using saline water, and saline reject water produced in water purification, to use for gold mining production, and growing and harvesting algae. The disclosure also describes a method for growing and harvesting algae utilizing saline water as growth medium for recycling waste water to extract the remaining metals out of waste water. The harvested algae may be used in various applications including but not limited to water purification for gold mining production and to extract metals out of remaining waste water. | 12-29-2016 |
| 20220136083 | MERCURY COLLECTION SYSTEM - A system for collecting mercury from feed material that can be tailings comprises: a water inlet for forming a slurry containing the tailings; at least one screen for separating tailings from the slurry to form a screened slurry; a rotatable collection chamber containing at least one plate, a drive for rotating the collection chamber for collecting mercury on the plate to provide a discharge material comprising water and treated tailings, the treated tailings containing less mercury than in the feed material. | 05-05-2022 |
