Class / Patent application number | Description | Number of patent applications / Date published |
075631000 | Noble metal, singly or in combination | 14 |
20100257978 | PROCESS FOR RECOVERING PLATINUM GROUP METALS FROM ORES AND CONCENTRATES - A method for recovering at least one platinum group metal (PGM) species from a feed product selected from the group consisting of chromite ore, chromite ore concentrate and PGM concentrate comprising the steps of: mixing the feed with at least one salt so as to produce a mixture, whereby the concentration of salt in the mixture is sufficient to convert at least one PGM species into a corresponding PGM chloride salt; and contacting the mixture with gaseous chlorine and CO at a temperature between about 240° C. and 800° C. to induce the conversion of at least one species of PGM into a solid material containing a corresponding PGM chloride salt, whereby said chloride salt of at least one PGM species can be recovered. | 10-14-2010 |
20110088512 | Method of precious metal recovery - The proposed methods of precious metal recovery and may be applied to the recovery of precious metals from various types of mineral raw source materials containing organic compounds of precious metals and chlorides of alkali and earth metals, e.g. collective concentrate produced from clay-salt residue of potassium production, or marker clays, etc. This method includes chlorinating roasting of the collective concentrate produced during enrichment of the material with residual chlorides, or natural concentrate with up to 15% chlorides content. Thereafter, the cinder is leached by an aqua-regia solution, the precious metals are recovered from the pulp via of sorption, chlorinating roasting is held at 600-700° C., the precious metals are leached from the cinder using diluted solution of aqua-regia, and then via sorption. The process is cost-efficient due to the use of chlorinating agent, reduction of the process steps number, decreasing of the roasting temperature, and the leaching by diluted acid. | 04-21-2011 |
20110174112 | Method for the recovery of nobel metals - The invention relates to methods of precious metals recovery and may be applied to the recovery of precious metals from mineral raw materials containing chlorides of alkali and earth metals, e.g. slimes of potassium production. The method includes the following: excessive chlorides and water are separated from the slimes containing precious metals and chlorides of alkali and earth metals, after which the slimes are forwarded to drying and roasting at the temperature of 850-950° C., and then the cider is leached by diluted solution of hydrochloric acid. The precious metals are recovered from the produced pulp by sorption with the help of resin (e.g. AM-2B). | 07-21-2011 |
20120036962 | SURFACE-MODIFIED BIOMASS, PREPARATION METHOD THEREOF, AND METHOD FOR RECOVERING VALUABLE METALS USING THE SAME - The present invention relates to a surface-modified biomass which is crosslinked with an amine group-containing cationic polymer on the surface of a cell biomass, its preparation method, and a method for recovering valuable metals using the same. The surface-modified biomass of the present invention has an advantage of improving adsorption of and affinity with anionic pollutants as a result of further introducing a cationic functional group by crosslinking of the amine group-containing cationic polymer on the surface of the biomass. In addition, the method for recovering valuable metals with the present invention is environment-friendly, economical, and harmless to the human body. | 02-16-2012 |
20120118108 | Recovery of Precious Metals from Spent Homogeneous Catalysts - This disclosure concerns the recovery of PGM (platinum group metals) from spent homogeneous catalysts present in an organic phase. Specifically, a pyrometallurgical process is provided whereby the PGM, and Rh in particular, are concentrated in a metallurgical phases, rendering them accessible for refining according to known processes. To this end, a process is disclosed comprising the steps of:—providing a molten bath furnace, having a submerged injector equipped for liquid fuel firing;—providing a molten bath comprising a metallic and/or matte phase, and a slag phase;—feeding the spent homogeneous catalyst and an O | 05-17-2012 |
20130180363 | METHOD FOR EFFICIENTLY RECOVERING PLATINUM GROUP ELEMENTS FROM COPPER-IRON SCRAP - A method for efficiently recovering a platinum group element comprises melting copper-iron scrap containing a platinum group element, forming the melt into two liquid phases, a molten copper phase containing at least one rare metal selected from the group consisting of Nd, Pr, and Dy and a molten iron phase having a carbon concentration of at least 1 mass %, with the carbon contained in the molten iron phase being derived from carbon contained in the melt, separating the two liquid phases, recovering the molten copper phase, and separating and recovering from the molten copper phase a platinum group element dissolved therein. The copper-iron scrap may contain a rare metal, or a member containing a rare metal may be added to the melt with a preferred total concentration of rare metals in the melt being at least 1 mass %. | 07-18-2013 |
20130276585 | METHOD FOR CONCENTRATING AND RECOVERING PRECIOUS METALS FROM SPENT MOBILE PHONE PCBS AND SPENT AUTO-CATALYSTS USING WASTE NONFERROUS SLAG - The present invention relates to a method of concentrating and recovering precious metals from waste mobile phone PCBs and spent automotive catalysts using waste nonferrous slag, in which precious metals such as gold, silver, platinum, palladium or rhodium can be concentrated and recovered by simultaneously treating different industrial wastes, including waste nonferrous slag, waste mobile phone PCBs and spent automotive catalysts, and industrial waste can be recycled as resources. According to the present invention, it is possible to maximize the utilization ratio of precious metal resources that totally depend on the import in terms of the domestic situation of a poor-natural resources country. In addition, the industrial waste can widely be utilized for the recovery of precious metals in the fields of household appliance recycling and electronic part manufacture, and the recycling of industrial by-products discharged in the field of non-ferrous refinery. | 10-24-2013 |
20140053687 | METHOD OF RECOVERING PGM - A method of suppressing a distribution of PGM into a Cu2O slag in an oxidation smelting of a method of recovering PGM, is provided, including: carrying out reduction smelting to a treatment target member containing PGM, Cu and/or Cu | 02-27-2014 |
20140090518 | METHOD FOR OBTAINING METALS AND RARE EARTH METALS FROM SCRAP - The method is used to obtain metals, noble metals, and rare earth metals from scrap. The aim of the invention is to provide a method that allows an efficient recovery even from electronic scrap. This is achieved in that the scrap and carbon-containing materials (A) are oxidized with oxygen containing gases ( | 04-03-2014 |
20140373682 | METHOD FOR RECOVERING RUTHENIUM FROM SPENT RUTHENIUM-BASED CATALYST CARRIED ON ALUMINUM OXIDE - A method for recovering ruthenium from a spent ruthenium-based catalyst carried on aluminum oxide includes: drying, calcining, and cooling a spent catalyst; grinding the spent catalyst into black powder; placing the black powder in a fluidized bed reactor, purging the reactor with hydrogen and heating the black powder to obtain ruthenium metal, then heating the black powder in a mixed atmosphere of oxygen and ozone to obtain RuO | 12-25-2014 |
20150068365 | INTEGRATED PROCESS FOR PRODUCTION OF OZONE AND OXYGEN - Embodiments of the present invention provide systems and methods for efficiently producing both a low-pressure ozone stream and high-pressure oxygen stream using a single air separation unit. The low-pressure ozone stream and high-pressure oxygen stream can be produced with significant energy savings and can be used in variety of applications, including the extraction of precious metals from ore with aqueous oxidation reactors and high-pressure oxidation reactors. | 03-12-2015 |
075632000 | Palladium(Pd) | 1 |
20140150608 | METHOD OF RECOVERING PLATINUM GROUP ELEMENTS - Provided is a method of unevenly distributing a specific element in a copper phase out of platinum group elements that exist in the copper phase, including further adding copper into a molten copper phase containing the platinum group elements including at least rhodium, thereby increasing a distribution ratio of rhodium in the molten copper phase. | 06-05-2014 |
075633000 | Platinum(Pt) | 1 |
20130139648 | Recovery Method for High Purity Platinum - A high purity platinum recovery method including the steps of dissolving a platinum alloy containing ruthenium in aqua regia and eliminating residue, thereafter causing acid with platinum dissolved therein and an ammonium chloride solution to react so as to deposit chloroplatinic ammonium salt, and reducing the chloroplatinic ammonium salt to obtain a platinum sponge. The method is characterized in that acid with platinum dissolved therein and the ammonium chloride solution are caused to react at a temperature of 40° C. or higher. Provided is a method which enables recovery, at a high yield, of high purity platinum which can be reused in a platinum and a platinum-containing target as a result of efficiently eliminating ruthenium, cobalt, chromium, copper, iron, nickel, silicon and the like which become included in a spent platinum alloy sputtering target, particularly a magnetic material target, and in scraps such as mill ends, sawdust, and surface grinding scraps generated during the production process of such a target. | 06-06-2013 |
075637000 | Gold(Au) | 1 |
20120144959 | SMELTING METHOD - A method of recovering gold from a gold containing source material comprising: forming a molten pool comprising at least one metal selected from the group consisting of copper, silver, gold and platinum group metals; and adding at least part of the source material into the molten pool of metal. | 06-14-2012 |