| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 423023000 | Group IB metal (Cu, Ag, or Au) | 56 |
| 20090104095 | NOVEL COMPOSITIONS AND RELATED METHODS, COATINGS, AND ARTICLES - Novel compositions, as well as related methods, coatings, and articles, are disclosed. | 04-23-2009 |
| 423024000 | Ion exchanging or liquid-liquid extracting | 11 |
| 20080247925 | SEPARATION AND RECOVERY OF PRECIOUS METALS USING POLYMER MATERIALS - A method of separation and/or recovery of a precious metal from a solution containing said precious metal in ionic form, optionally in the presence of impurities, including the step of contacting a solution containing said precious metal in ionic form with a conducting polymer. The method is generally applicable to precious metals including platinum (Pt), palladium (Pd) and more particularly gold (Au). The ionic species may be anionic (for example [AuCl.sub.4].sup.-) or cationic. The polymer may be for example, a polypyrrole or polythiophene, optionally doped and are preferably in a high surface area form eg. coated onto cloth or RVC or in self supporting colloidal form. The polymer may also contain species to give further functionality, eg magnetic or heat sensitive species. | 10-09-2008 |
| 20090022639 | Method for the recovery of valuable metals and arsenic from a solution - The invention relates to a method for the treatment of material containing at least one valuable metal and arsenic to form a valuable metal-depleted scorodite sediment and a pure aqueous solution to be discharged from the process. According to the method, the valuable metals are first removed from the material to be treated and then arsenic precipitation from the solution is performed in two stages. By means of the method, the aim is to obtain as low a valuable metal content as possible in the scorodite sediment that will be formed. Likewise, the arsenic and valuable metal content of the aqueous solution that is formed during arsenic precipitation also remains so low that the water can be released into the environment. | 01-22-2009 |
| 20100092357 | METAL EXTRACTANT REAGENTS HAVING INCREASED RESISTANCE TO DEGRADATION - A solvent extraction composition and process for using the composition is provided. The composition contains up to 70% by weight of at least one orthohydroxyarylketoxime extractant and/or at least one orthohydroxyarylaldoximes extractant, salts and mixtures thereof; from about 0.1 to about 20% by weight of at least one substantially water insoluble aromatic hydroxy containing antidegradation agents. The composition optionally contains an equilibrium modifier. | 04-15-2010 |
| 20100166626 | SYSTEM AND METHOD FOR WASTEWATER TREATMENT - The present disclosure is directed towards systems and methods for the treatment of wastewater. A system in accordance with one particular embodiment may include a vacuum filter band system configured to receive a saturated resin tank from a front end system, the vacuum filter band system configured to generate a slurry from the saturated resin tank and to provide a cascading resin rinse to the slurry. The system may further include a repetitive stripping system configured to receive a metal-filled purification unit from a metal specific purification system. The repetitive stripping system may be further configured to sequentially apply the contents of a plurality of acid tanks to the metal-filled purification unit to generate a metal salt. Numerous other embodiments are also within the scope of the present disclosure. | 07-01-2010 |
| 20100189612 | SYSTEM AND METHOD FOR SEPARATING TELLURIUM FROM CADMIUM WASTE - The present invention relates to a method and system for recovery of waste. | 07-29-2010 |
| 20110229385 | METHOD OF LEACHING COPPER SULFIDE ORE - A method of leaching copper sulfide ore includes leaching copper from copper sulfide ore using a sulfuric acid solution comprising iodide ion and iron (III) ion surplus to the iodide ion as a leaching solution; reducing iodine in a solution obtained after the leaching step to less than 1 mg/L by an activated carbon treatment; and oxidizing iron (II) ion or newly added iron (II) ion in a solution obtained after the iodine reduction step by using iron oxidizing microbes to recover iron (III) ion. | 09-22-2011 |
| 20120219478 | Methods Of Metal Extraction From Ammoniacal Solutions Using Oximes - Provided are methods using ketoximes and/or aldoximes, including 3-methyl-5-alkylsalicylaldoxime and/or 3-methyl-5-alkyl-2-hydroxyacetophenone oxime, in reagent compositions for metal extraction/isolation. One such method is of extracting a metal from an aqueous ammoniacal solution. Metals that can be extracted include nickel, zinc and copper. | 08-30-2012 |
| 20120282156 | MODIFICATION OF COPPER/IRON SELECTIVITY IN COPPER SOLVENT EXTRACTION SYSTEMS - Processes for improving copper/iron selectivity in a solvent extraction circuit by contacting an acidic aqueous solution containing dissolved copper and iron ions with a solvent extraction composition including an orthohydroxyaryloxime, a selectivity modifier, and an equilibrium modifier, wherein the ratio of selectivity modifier to orthohydroxyaryloxime is from 0.001 to 0.05, thereby decreasing the copper:iron transfer ratio, are provided herein. | 11-08-2012 |
| 20130302225 | Compositions And Methods Of Using A Ketoxime In A Metal Solvent Extraction Reagent - Provided are methods using a ketoxime in metal extraction. One aspect of the invention relates to a method for the recovery of metal from a metal-containing aqueous solution at an elevated temperature using a ketoxime. Another aspect relates to a method of separating iron/copper using a specific ketoxime. Aldoximes may also be added to the reagent compositions used in these methods. | 11-14-2013 |
| 20140271415 | MODIFIED OXIME EXTRACTANT FORMULATION - A solvent extraction composition that is particularly useful for the extraction of metals from a solution containing the metals. The solvent extraction composition includes an orthohydroxyaryloxime extractant, at least one water immiscible organic solvent, and an effective amount of a substantially water insoluble equilibrium modifier. The equilibrium modifier includes at least one of an aliphatic, aromatic or araliphatic compound comprising three or more ester functional groups. A method for the solvent extraction of a metal such as copper from an aqueous solution using the solvent extraction composition is also provided. | 09-18-2014 |
| 20140363356 | EXTRACTION OF GOLD - Disclosed is a process for extracting gold ions from an aqueous phase containing gold ions. The process comprises contacting the aqueous phase with an extractant phase consisting of or comprising an ionic liquid (IL) under liquid-liquid extraction conditions for a time sufficient to allow transfer of at least some of the gold ions from the aqueous phase to the extractant phase; and separating the extractant phase from the aqueous phase. | 12-11-2014 |
| 423025000 | Sorbing or magnetic separating | 7 |
| 20100296987 | Method for the Recovery of Gold from a Gold-Containing Solution - The invention relates to a method for the recovery of gold from a gold-containing chloride solution using activated carbon. The gold-containing solution and the carbon are contacted with each other, after which the gold that has formed as metallic particles on the surface of the carbon is separated from the carbon using physical methods as gold concentrate that contains metallic gold. | 11-25-2010 |
| 20110142736 | PROCESS OF RECOVERY OF BASE METALS FROM OXIDE ORES - A method for recovering base metal values from oxide ore is provided, where the ore includes a first group metal selected from iron, magnesium and aluminum and a second group metal selected from nickel, cobalt and copper. The method includes reducing ore particle size to suit the latter unit operations, favoring contact of the metal elements, contacting the ore with ferric or ferrous chloride, hydrated or anhydrous, to produce a mix of ore and iron(II or III) chloride, subjecting the mixture of the ore and ferric or ferrous chloride to enough energy to decompose the chlorides into hydrochloric acid and a iron oxide, contacting the readily-formed hydrochloric acid with the base metal oxides from the second group, forming their respective chlorides, selectively dissolve the produced base metal chlorides, leaving the metals as oxides and in the solid state, and recovering the dissolved base metal values from aqueous solution. | 06-16-2011 |
| 20120128556 | Oxine Modified Silican Polyamine Composites for the Separation of Gallium from Aluminum, Ferric From Nickel and Copper from Nickel - The oxine ligands 5-chloro-8-hydroxyquiniline and 5-sulfoxyl-8-hydroxyquinoline are covalently bound, using, for example, the Mannich reaction, to a silica gel polyamine composite made from a silanized amorphous silica xerogel and polyallylamine. The resulting modified composites, termed CB-1 (X═Cl) and SB-1 (X═SO | 05-24-2012 |
| 20120219479 | ADSORBENT AND METHOD OF COLLECTING PRECIOUS METAL USING THE SAME - An adsorbent contains a carbohydrate having an ether linkage. Alternatively, an adsorbent contains a carbohydrate having a cross-linkage formation produced by a dehydration reaction using a strong acid. In collection of a precious metal using the adsorbent, the adsorbent selectively adsorbs a precious metal dissolved in a solution. | 08-30-2012 |
| 20120308450 | PROCESS OF RECOVERY OF BASE METALS FROM OXIDE ORES - A method for recovering base metal values from oxide ore is provided, where the ore includes a first group metal selected from nickel, cobalt and copper. The method includes reducing ore particle size to suit the latter unit operation, favoring contact for the metal elements, contacting the ore with ferric or ferrous chloride, hydrated or anhydrous, to produce a mix of ore and iron (II or III) chloride subjecting the mixture of the ore and ferric or ferrous chloride to enough energy to decompose the chlorides into hydrochloric acid and a iron oxides from the second group, forming their respective chlorides, selectively dissolve the produced base metal chlorides, leaving the metal as oxides and in the solid state, and recovering the dissolved base metal values from aqueous solution. | 12-06-2012 |
| 20140348728 | Method for Improving Gold Recovery - Disclosed are methods and compositions for improving metal extraction processes by introducing at least one cationically charged compound selected from a group consisting of amines, particularly quaternary amines such as alkyldimethylbenzylammonium chlorides (ADBAC compounds), polyamines and other suitable cationic organic materials, and mixtures thereof, for neutralizing and/or coagulating excess anionic organic compounds including, for example, flotation reagents, surfactants, polymers, flotation reagent by-products and/or anti-scalant additives found in metal concentrate streams, and thereby reduce the downstream fouling of the activated carbon by these compounds. | 11-27-2014 |
| 20140377152 | COPPER RECOVERY APPARATUS AND COPPER RECOVERY METHOD - According to one embodiment, a copper recovery apparatus includes a precipitation tank configured to precipitate copper hydroxide grains in water, a filter aid supplier, a mixing tank configured to mix the filter aid with a water to produce a suspension, a separator provided with a filter, a line configured to supply the suspension to the separator, thereby forming a precoat layer formed of the filter aid on the filter, a separation tank configured to receive the detached matter of the precoat layer discharged together with the detaching water from the separator to magnetically separate copper hydroxide grains and filter aid, a line configure to discharge and recover the detaching water from the separation tank, and a line configured to return the separated filter aid to the filter aid supplier from the separation tank. | 12-25-2014 |
| 423026000 | Flotation | 9 |
| 20100233050 | Hardwood Lignosulfonates for Separating Gangue Materials From Metallic Sulfide Ores - Disclosed are compositions and methods for separating gangue material from metallic sulfide ores. The compositions typically include a lignosulfonate and do not include a cyanide salt. Suitable lignosulfonates may include lignosulfonates, for example hardwood lignosulfonate having a weight average molecular weight of about 3 kDa to about 12 kDa and having a relatively low sulfur content and a relatively low sulfonate content. | 09-16-2010 |
| 20110020198 | PROCESS FOR RECOVERING COPPER SULPHIDE FROM COPPER BEARING ORES BY FROTH FLOTATION - Process for recovering copper sulphide and optionally molybdenum sulphide from a copper bearing ore by froth flotation includes
| 01-27-2011 |
| 20120027652 | METATHETIC COPPER CONCENTRATE ENRICHMENT - In one aspect, the invention provides processes for producing an enriched copper concentrate from a copper-and-nickel-containing ore. Processes of the invention may include an initial step of comminuting the ore, to provide a ground ore comprising copper minerals and nickel minerals. The ground ore may be subjected to a floatation process, to separate the ground ore into distinct fractions, such as first and second concentrates. A first concentrate may for example be made up of copper-enriched-and-nickel-containing solids, while a second concentrate is made up of nickel-enriched-and-copper-containing solids. The floatation process may for example fractionate the ore so that the concentration of copper minerals is higher in the first concentrate than in the ore, and the concentration of the nickel minerals is higher in the second concentrate than the ore. | 02-02-2012 |
| 20130004389 | METHOD FOR SEPARATING ARSENIC MINERAL FROM COPPER-BEARING MATERIAL WITH HIGH ARSENIC GRADE - Disclosed herein is a method for separating an arsenic mineral from a copper-bearing material, including the steps of grinding a copper-bearing material containing arsenic, adding water to the copper-bearing material to prepare a slurry, and adding a flotation agent including a depressant, a frother, and a collector to the slurry and blowing air into the slurry for performing flotation to obtain a copper concentrate, wherein the depressant is a chelator. As the chelator, a polyethyleneamine or the like is used. Particularly, when triethylenetetramine is used as the chelator, the amount of triethylenetetramine to be added is preferably 1 to 10 equivalents relative to the amount of soluble copper generated by oxidation of the copper-bearing material, and the pH of the slurry is more preferably adjusted to 7 or more but 8 or less before the slurry is subjected to the flotation. | 01-03-2013 |
| 20140044617 | METATHETIC COPPER CONCENTRATE ENRICHMENT - In one aspect, the invention provides processes for producing an enriched copper concentrate from a copper-and-nickel-containing ore. Processes of the invention may include an initial step of comminuting the ore, to provide a ground ore comprising copper minerals and nickel minerals. The ground ore may be subjected to a floatation process, to separate the ground ore into distinct fractions, such as first and second concentrates. A first concentrate may for example be made up of copper-enriched-and-nickel-containing solids, while a second concentrate is made up of nickel-enriched-and-copper-containing solids. The floatation process may for example fractionate the ore so that the concentration of copper minerals is higher in the first concentrate than in the ore, and the concentration of the nickel minerals is higher in the second concentrate than the ore. | 02-13-2014 |
| 20140044618 | Process of Gold and Copper Recovery From Mixed Oxide - Sulfide Copper Ores - The present invention relates to a process of gold and copper recovery from gold-containing copper ores obtained from mixed oxide-sulfide copper ore bodies by a series of flotation stages. More specifically, the present invention relates to a process of gold and copper recovery whereby gold-containing ores obtained from mixed oxide-sulfide copper ore bodies, and/or copper flotation by-products thereof, are subjected to at least one flotation step following a dewatering step. In particular, it recovers copper and gold from the oxidized zone of porphyry and other mixed ore deposits. Likewise, the present process allows recovery of copper and gold from the tailings and scavenger concentrates which, in conventional process are no longer viable for further treatment. | 02-13-2014 |
| 20140369906 | ENRICHMENT OF METAL SULFIDE ORES BY OXIDANT ASSISTED FROTH FLOTATION - The present invention is directed to methods that can be used in the enrichment of metal sulfide ores in desired minerals in cases where the ores have sulfide-containing gangues. The method involves adding an oxidant to slurries prepared from the ores during, or immediately prior to froth flotation. | 12-18-2014 |
| 20160144381 | METHOD FOR RECOVERING A COPPER SULFIDE CONCENTRATE FROM AN ORE CONTAINING AN IRON SULFIDE - In a method for recovering a copper sulfide concentrate by froth flotation from an ore containing an iron sulfide, wet grinding of the ore with grinding media made of high chromium cast iron alloy having a chromium content of from 10 to 35% by weight is combined with an addition of hydrogen peroxide to the conditioned mineral pulp before or during flotation in order to improve concentrate grade and recovery of copper sulfides. | 05-26-2016 |
| 20160158768 | METHOD FOR RECOVERING A COPPER SULFIDE FROM AN ORE CONTAINING AN IRON SULFIDE - In a method for recovering a copper sulfide concentrate by froth flotation from an ore containing an iron sulfide, hydrogen peroxide is added to the conditioned mineral pulp before or during flotation in an amount effective to lower the redox potential of the conditioned mineral pulp in order to improve concentrate grade and recovery of copper sulfides. | 06-09-2016 |
| 423027000 | Leaching, washing, or dissolving | 19 |
| 20080241024 | Method for Leaching Metal Sulphide Minerals - The invention relates to a method for the sulphate-based leaching of metal sulphide minerals, such as chalcopyrite, CuFeS | 10-02-2008 |
| 20090123350 | Recovery of precious metals and their compounds from natural quartz ore using sodium silicate manufacturing techniques - This patent is an improvement of the well known process outlined in U.S. Pat. No. 4,336,235. The current invention is unique in the fact that it applies this well-known manufacturing technique to the recovery of precious metals locked in natural quartz complexes. The desired products of the process described herein are the precious metals and their compounds, which are not recoverable in appreciable yields by standard mining recovery techniques from the natural quartz ore complexes. In the aforementioned patent the application as a viable mining recovery operation is not obvious, nor is the invention presented herein covered in the claims of the aforementioned patent. By applying the process described in the original patent to precious metals bearing quartz ore complexes, greater yields of precious metals than are currently attainable can result from the mining recovery operations | 05-14-2009 |
| 20100098605 | Reduction Of Copper Content In The Molybdenite Concentrate - Methods and systems for removing copper minerals from a molybdenite concentrate. One embodiment provides leaching copper from the molybdenite concentrate with a leaching solution comprising ferric chloride, removing molybdenite from the leaching solution, introducing an acid into the leaching solution and introducing O | 04-22-2010 |
| 20130209335 | LEACHING PROCESS FOR COPPER CONCENTRATES CONTAINING CHALCOPYRITE - A method of recovering copper from chalcopyrite concentrate by chemical leaching, using pyrite and silver. The catalytic properties of pyrite in the chalcopyrite leaching process are significantly enhanced by pretreating the pyrite with silver ions. Particulate pyrite is exposed to a solution containing silver ions to form silver-treated pyrite. Particulate chalcopyrite and the silver-treated pyrite are mixed in an acidic sulfate leach solution. The copper is leached from the concentrate in the leach solution in the presence of an oxygen-containing gas, under conditions whereby the pyrite is substantially unoxidized. The leached copper is recovered from the solution by conventional methods. The used silver-treated pyrite is recycled to the leaching process. | 08-15-2013 |
| 20130266493 | METHOD FOR SEPARATING NICKEL FROM MATERIAL WITH LOW NICKEL CONTENT - The invention relates to a method for separating nickel and other valuable metalsparticularly from material having low nickel content, which contains iron and magnesium in addition to nickel and other valuable metals. The material havinglow nickel content is subjected to pulpingand atmospheric leaching in acidic and oxidising conditions, in which the majority of the metals in themate-rialdissolve and the iron is partially precipitated. The precipitated iron is sepa-rated from the solution, after which nickel and the other dissolved valuable metalsare precipitated as sulphides. | 10-10-2013 |
| 20130336857 | SUSTAINABLE PROCESS FOR RECLAIMING PRECIOUS METALS AND BASE METALS FROM E-WASTE - Processes for recycling electronic components removed from printed wire boards, whereby precious metals and base metals are extracted from the electronic components using environmentally friendly compositions. At least gold, silver and copper ions can be extracted from the electronic components and reduced to their respective metals using the processes and compositions described herein. | 12-19-2013 |
| 20140023572 | METHOD OF ORE PROCESSING - A method of selectively leaching a metal such as nickel from an ore or ore processing intermediate comprising the metal and cobalt. The ore or ore processing intermediate is contacted with an acidic leach solution comprising an amount of an oxidising agent sufficient to oxidise a major portion of the cobalt to thereby cause it to be stabilised in the solid phase while a major portion of the metal is dissolved for subsequent recovery. | 01-23-2014 |
| 20140147354 | STRIPPING AGENT AND METHOD OF USE - A method of removing mercury adsorbed onto activated carbon is provided. The method includes treating an adsorbed mixture of metal cyanide complexes on a carbon substrate with an acidic solution of a stripping agent that is a weak acid. The method also eliminates inorganic scalants from the carbon substrate. In precious metal mining operations, the disclosed method reduces environmental emissions of mercury during the gold elution and carbon reactivation processes. | 05-29-2014 |
| 20150329938 | HYDROMETALLURGICAL METHOD FOR THE REMOVAL OF RADIONUCLIDES FROM RADIOACTIVE COPPER CONCENTRATES - A hydro-metallurgical method | 11-19-2015 |
| 20150361523 | USE OF OXYGENATED OR POLYOXYGENATED INORGANIC WEAK ACIDS, OR DERIVATIVES, RESIDUES AND WASTE THEREOF, IN ORDER TO INCREASE THE RECOVERY OF COPPER AND/OR THE CONCENTRATION OF COPPER IN PROCESSES FOR THE LEACHING OR BIOLEACHING OF COPPER MINERALS - The invention concerns the use of oxygenated or polyoxygenated weak acids, or minerals or compounds that generate the same, or of solid and liquid wastes from plants producing oxygenated or polyoxygenated weak acids, or minerals or compounds and their derivatives to increase copper recovery from mineral and/or to increase the copper concentration of the pregnant leach solution in the copper leaching process or the copper bioleaching process. | 12-17-2015 |
| 423029000 | With a cyanide compound | 3 |
| 423030000 | And pressurizing | 1 |
| 20080286180 | Process for gold and silver recovery from a sulphide concentrate - A process for the extraction of a precious metal, such as gold or silver, from a sulphide ore or concentrate or other source material comprises subjecting the source material to pressure oxidation to produce a pressure oxidation slurry. The pressure oxidation slurry is flashed down to a lower temperature and pressure and is then subjected to a liquid/solid separation to obtain a pressure oxidation solution and a solid residue containing the precious metal. The solid residue is then subjected to cyanidation to extract the precious metal. The formation of thiocyanide during cyanidation is minimized or counteracted by effecting the cyanidation at an elevated oxygen pressure and a reduced retention time, such as 30 to 90 minutes. A method for the reduction of copper cyanide formation during cyanidation leaching is also provided. | 11-20-2008 |
| 423031000 | And agitating | 2 |
| 20080317649 | Process for recausticizing cyanide leach solutions - A method is shown for raising the pH of a cyanide leach solution of the type used in a heap leaching mining operation. Lime slurry is mixed with a side stream of barren cyanide solution in a reactor vessel in order to remove carbonate hardness, to regenerate the hydroxide alkalinity and to raise the pH of the resulting recausticized leach solution. A portion of the calcium carbonate precipitate formed in the reactor vessel is retained in order to encourage further crystal growth. Overflow from the reactor vessel passes through one or more cyclone separation stages in order to remove particulate solids. A cyclone overflow stream is directed back to the process to upwardly adjust the pH of the bulk of the barren cyanide solution. A cyclone underflow stream is directed back to the reactor vessel to provide seed crystal nuclei for precipitate growth. Periodically, precipitate grains are drained from the bottom of the reactor vessel, water-washed to recover cyanide solution, and discharged as carbonate sand and lime grit. | 12-25-2008 |
| 20090297412 | Solid/liquid reaction process and vessel incorporating buoyant covers - Disclosed is a solid/liquid reaction process comprising the steps of:
| 12-03-2009 |
| 423032000 | With ammonia or ammonium containing compound | 1 |
| 20130156661 | SYSTEMS AND METHODS FOR METAL RECOVERY - Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, leaching the roasted metal hearing material in a basic medium to yield a pregnant leach solution, conditioning the pregnant leach solution to thrill a preprocessed metal bearing material; and leaching the preprocessed metal bearing material in acid medium. | 06-20-2013 |
| 423034000 | Forming insoluble substance in liquid | 4 |
| 20090074640 | SILICA REMOVAL FROM PREGNANT LEACH SOLUTIONS - The present invention relates generally to a process for removing dissolved or colloidal silica from a pregnant leach solution (“PLS”). More particularly, an exemplary embodiment of the present invention relates to a process which mixes PLS with an acid source, preferably lean electrolyte, to induce formation of colloidal silica that can then be collected and removed. Additionally, in an exemplary embodiment of the present invention, at least one silica seeding agent is added to induce formation of colloidal silica, at least one flocculant is added to induce aggregation of the colloidal silica, and a solid-liquid separation process is utilized to remove advantageous amounts or substantially all of the colloidal silica, thereby providing relief from supersaturation of dissolved silica in the metal recovery processes. | 03-19-2009 |
| 20160201161 | POLYMER SUPPORT AND METHOD OF LEACHING OF MINERAL CONCENTRATES | 07-14-2016 |
| 423037000 | Sulfiding | 2 |
| 20120328494 | METHOD FOR RECOVERING INDIUM, SILVER, GOLD AND RARE, PRECIOUS AND BASE METALS FROM COMPLEX OXIDE AND SULFIDE ORES - The present invention relates to methods for recovering precious metals including silver and gold, rare metals including indium and gallium, base metals including copper, lead and zinc or a combination of precious, rare and base metals from complex oxide ores, sulfide ores or oxide and sulphide ores using an acid chloride oxidizing leach. | 12-27-2012 |
| 20150322544 | BRINE LEACHING PROCESS FOR RECOVERING VALUABLE METALS FROM OXIDE MATERIALS - A process is provided in which a silver- and base metal-containing material is contacted with an aqueous solution comprising an alkali and/or alkaline earth metal halide and an oxidant at a solution pH of at least about pH 6 to dissolve the silver into a pregnant leach solution while maintaining at least most of the base metal in the silver- and base metal-containing material. | 11-12-2015 |
| 423038000 | Halogenating | 1 |
| 20130058846 | METHOD FOR PROCESSING ACIDIC SOLUTION THAT CONTAINS IODIDE IONS AND IRON IONS - Provided is a method for separating and recovering iodine ingredients from acid solution containing iodide ions and iron (II) ions and for efficiently producing iron (III) ions. Said method is for treating acid solution containing the iodide ions and the iron (II) ions. Said method comprises a step of oxidizing the iron (II) ions in said solution into iron (III) ions with iron-oxidizing microorganisms, the step being performed in the presence of activated carbon. | 03-07-2013 |
| 423042000 | Forming insoluble substance in liquid | 8 |
| 20120114539 | Metal Recovery Process - A process for recovering a metal chloride or mixed metal chloride from a solid waste material comprising recoverable metal containing constituents produced by lead, copper or zinc smelting and refining processes, said process comprising the steps of: (i) heating the solid waste material; (ii) treating the heated material of step (i) with a gaseous chloride to form a gaseous metal chloride containing product; and (iii) treating the gaseous metal chloride containing product of step (ii) to recover the metal chloride or mixed metal chloride. The metal chloride may be further treated to extract the metal itself. | 05-10-2012 |
| 20120244050 | CLEANING AGENT FOR SILVER-CONTAINING COMPOSITION, METHOD FOR REMOVING SILVER-CONTAINING COMPOSITION, AND METHOD FOR RECOVERING SILVER - A cleaning agent for a silver-containing composition is provided which can readily remove silver adhered to an object to be cleaned with excellent operability and low environmental loads. This cleaning agent for the silver-containing composition includes an iron nitrate aqueous solution and used to remove silver derived from a composition containing silver nanoparticles having an average diameter of 1 nm to 100 nm adhered to the object to be cleaned. | 09-27-2012 |
| 20120301375 | LOW ENERGY METHOD OF PREPARING BASIC METAL CARBONATES AND OTHER SALTS - A method of preparing basic metal carbonate selected from the group consisting of zinc carbonate, nickel carbonate, silver carbonate, cobalt carbonate, tin carbonate, lead carbonate, manganese carbonate, lithium carbonate, sodium carbonate, and potassium carbonate from metals comprising: contacting the metal with an aqueous solution comprising an amine, carbonic acid, and oxygen under conditions where the metal is converted into basic metal carbonate; and recovering the basic metal carbonate. | 11-29-2012 |
| 20140120012 | METHOD FOR SELECTIVE PRECIPITATION OF IRON, ARSENIC AND ANTIMONY - A method for selectively processing a polymetallic oxide solution containing a plurality of base metals comprising at least one of: Cu, Co, Ni, Zn associated with iron, comprising acid leaching the solution; recovering a filtered leachate; oxidizing the leachate; and adjusting the pH of the leachate in presence of a complexing agent; wherein the acidic solution is one of: i) a hydrochloric acid solution and ii) a sulfuric acid solution at a pH lower than about 1.5, and the complexing agent is one of: i) ammonium chloride and ii) ammonium sulfate, the step of adjusting the pH comprising raising the pH to a range between about 2.5 and about 3.5. | 05-01-2014 |
| 20160076120 | METHOD FOR COLLECTING SILVER IONS AND PHOSPHORIC ACID IN WASTE FLUID - A method for collecting silver ions and phosphoric acid in a waste fluid includes collecting silver chloride from the waste fluid, collecting silver chloride including providing a chloride compound to the waste fluid; and collecting phosphoric acid, collecting phosphoric acid including distilling the waste fluid from which the silver chloride has been collected. | 03-17-2016 |
| 423043000 | Specified pH | 3 |
| 20080274026 | SELECTIVE PRECIPITATION OF METAL SULFIDES - A method for recovering zinc ions by selective zinc sulfide precipitation from an aqueous solution comprising zinc ions and metal ions of a metal that precipitates as a metal sulfide at a pH lower than a pH at which zinc ions precipitate as a zinc sulfide. | 11-06-2008 |
| 20080279737 | Method for processing waste copper solution/liquid to produce high copper content sludge - The present invention discloses a method for processing waste copper solution/liquid to produce high copper content sludge, mainly by recycling a low copper content waste solution from production of PCB in order to discharge a comparatively higher copper content sludge; first classify the waste solution into an acidic low concentration copper waste solution, an acidic high concentration copper waste solution, and an oxidized acidic high concentration copper waste liquid, and then mix with a strong alkali to react and form a cupric oxide sludge, then undergo dehydration/baking by an applicable equipment to remove water and get a comparatively higher copper content sludge; therefore, it is unnecessary to add other conversion agents to convert copper hydroxide into cupric oxide, thereby turning the valueless low copper content sludge from a waste water (or liquid) into a valuable recyclable high copper content sludge. | 11-13-2008 |
| 20150037230 | SIMPLE LOW ENERGY PROCESS FOR THE SEPARATION OF ZINC AND COPPER FROM AN AMMONIACAL SOLUTION - A method for selectively precipitating basic zinc carbonates (BZC) from basic copper carbonates (BCC) from an aqueous ammoniacal solution prepared using a mixture of copper- and zinc-containing materials. | 02-05-2015 |
| 423046000 | Halogenating | 1 |
| 20110058997 | PROCESS FOR CHLORINATING RESOURCES CONTAINING RECOVERABLE METALS - A process for chlorinating ore, slag, mill scale, scrap, dust and other resources containing recoverable metals from the groups 4-6, 8-12, and 14 in the periodic table. The process comprises: a) forming a liquid fused salt melt consisting essentially of aluminum chloride and at least one other metal chloride selected from the group consisting of alkali metal chlorides and alkaline earth metal chlorides, wherein the aluminum chloride content in the liquid salt melt exceeds 10% by weight; b) introducing the recoverable metal resources into said liquid salt melt: c) reacting the aluminum chloride as chlorine donor with said recoverable metal resource to form metal chlorides, which are dissolved in the salt melt; and d) recovering the formed metal chlorides from the salt melt. | 03-10-2011 |
