US20130146477A1 - Method for recovering noble metals and other byproducts from ore - Google Patents
Method for recovering noble metals and other byproducts from ore Download PDFInfo
- Publication number
- US20130146477A1 US20130146477A1 US13/701,245 US201013701245A US2013146477A1 US 20130146477 A1 US20130146477 A1 US 20130146477A1 US 201013701245 A US201013701245 A US 201013701245A US 2013146477 A1 US2013146477 A1 US 2013146477A1
- Authority
- US
- United States
- Prior art keywords
- ore
- ore particles
- electrolytic bath
- bath
- noble metals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 58
- 229910000510 noble metal Inorganic materials 0.000 title claims abstract description 30
- 239000006227 byproduct Substances 0.000 title description 13
- 239000002245 particle Substances 0.000 claims abstract description 57
- 238000011084 recovery Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 230000035939 shock Effects 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-DYCDLGHISA-N deuterium hydrogen oxide Chemical compound [2H]O XLYOFNOQVPJJNP-DYCDLGHISA-N 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims description 12
- 238000002604 ultrasonography Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 5
- 239000004677 Nylon Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 description 9
- 239000003440 toxic substance Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002105 nanoparticle Substances 0.000 description 3
- 231100000252 nontoxic Toxicity 0.000 description 3
- 230000003000 nontoxic effect Effects 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 231100000614 poison Toxicity 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052805 deuterium Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001510 metal chloride Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 231100000167 toxic agent Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 229910052722 tritium Inorganic materials 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- -1 platinum group metals Chemical class 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/20—Electrolytic production, recovery or refining of metals by electrolysis of solutions of noble metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
Definitions
- the present invention relates to a method for recovering noble metals and other byproducts from ore.
- the present invention relates in particular to a method for recovering noble metals and other byproducts by disintegration of ore using nontoxic processes.
- Leaching is a relatively cheap recovery method with a recovery rate of around 50%, using toxic substances such as mercury, cyanide, strong acids, etc.
- Electrochemistry has a high recovery rate of up to 98% but is a slow process, which makes it uneconomical for the recovery of noble metals from ore.
- An aim of the present invention is thus to propose an industrially applicable method for recovering noble metals and other byproducts from ore allowing for a high recovery rate.
- Another aim of the present invention is to propose an industrially applicable and economical method for recovering noble metals and other byproducts from ore
- Still another aim of the present invention is to propose an industrially applicable method for recovering noble metals and other byproducts from ore that doesn't use nor produce any toxic substance.
- a method for the recovery of noble metals comprising the steps of subjecting ore particles to an electrolytic bath enhanced by an ultrasonic bath, the electrolytic bath comprising heavy and/or semi-heavy water; shock heating the ore particles for disintegrating them; and separating noble metals from the remains of said disintegrated ore particles.
- the method of the invention for recovering noble metals and other byproducts from ore is economical applicable at an industrial scale. Experiments have shown that it has a typical recovery rate of 95 to 99.9%. No toxic substance is used or produced during any step of the method.
- FIG. 1 schematically illustrates an electrolytic bath placed inside an ultrasonic bath for performing a step of the method according to a preferred embodiment of the invention
- FIG. 2 schematically illustrates a crucible placed in a microwave oven for performing another step of the method according to a preferred embodiment of the invention
- FIG. 3 schematically illustrates a cone shaped container placed in an ultrasonic bath for performing still another step of the method according to a preferred embodiment of the invention.
- the method of the invention for the recovery of noble metals and other byproducts from ore preferably comprises the following steps:
- the method of the invention for recovering noble metals and other byproducts from ore is preferably performed on small particles of crushed ore.
- the ore is thus crushed down to a predetermined target particle size, which participates to an increased efficiency of the next steps of the method of the invention for maximizing the recovery rate achieved with the method of the invention.
- the target size for the ore particles is preferably smaller than or equal to 590 microns (30 US Mesh), more preferably smaller than or equal to 420 microns (40 US Mesh), even more preferably smaller than or equal to 250 microns (60 US Mesh). Crushing of the ore is performed using any appropriate, preferably mechanical, method.
- the crushed ore is further centrifuged in order to create micropores and/or cracks or macropores in the ore particles and/or in order to further open micropores and/or cracks or macropores made in the ore particles during crushing.
- the preferably crushed ore is placed in an electrolytic bath and simultaneously submitted to ultrasounds.
- the ore particles are placed in two ore containers 30 that are immersed at a distance from each other in an electrolytic bath 1 .
- the external walls of the ore containers 30 are preferably permeable to the ions of the electrolytic bath.
- the external walls of the containers 30 are made of a microporous nylon membrane.
- the ore containers 30 are preferably cone shaped for an improved efficiency of the method of the invention. Other shapes are however possible within the frame of the invention.
- An electrode 3 is located in each ore container 30 .
- the electrodes 3 are electrically connected to a source of electrical power, which is not represented on the figures.
- the electrodes 3 are for example made of titanium or nickel and preferably have both the same shape and size.
- the electrodes 3 are preferably metallic rods that are located vertically along the central axis of their respective ore container 30 . Other shapes and configurations of the electrodes are however possible within the scope of the invention.
- Each electrode may for example comprise several branches that are spread within their respective ore container.
- the electrolytic bath 1 is placed in an ultrasonic bath 2 , in which ultrasounds are generated that propagate through the walls of the electrolytic bath container 10 and into the electrolytic bath 1 .
- the temperature of the ultrasonic bath 2 is preferably around eighty degrees Celsius.
- the composition of the electrolytic bath 1 preferably includes heavy and/or semi-heavy water, such as for example deuterium or tritium.
- the concentration of heavy and/or semi-heavy water in the electrolytic bath 1 is for example between 2 to 5 percents.
- the composition of the ultrasonic bath 2 is for example essentially water and/or any liquid in which ultrasounds efficiently propagate.
- the ultrasounds are preferably generated by one or more ultrasonic transducers located preferably inside the ultrasonic bath container 20 , which are not shown on the figures for the sake of readability and conciseness.
- the electrolytic processing of the ore is initiated by applying direct current (DC) voltage to the electrodes 3 , for example six volts DC voltage with a current density of six amperes per square decimeter (A/dm 2 ).
- DC direct current
- One of the electrodes 3 becomes the anode, while the other electrode 3 becomes the cathode.
- the polarity of the DC voltage is inversed at regular intervals in order to submit the ore contained in both ore containers 30 to the same treatment, i.e. to the same polarities for equivalent periods of time.
- the DC voltage is for example applied to the electrodes 3 for a total of two hours, divided in four cycles of thirty minutes each. After each cycle of thirty minutes, the polarity of the DC voltage is changed, i.e. after each cycle of thirty minutes, the cathode becomes the anode and vice versa.
- chlorine and other gases and/or soluble salts are produced near the anode, which penetrate the ore particles contained in the corresponding ore container 30 . These gases and/or soluble salts will participate to the disintegration of the ore particles in a next step of the method.
- reactive metal chlorides for example sodium, calcium, potassium, etc.
- Alkaline reactions then take place near the cathode, which generates an at least partial disintegration the ore particles contained in the corresponding ore container 30 .
- the ultrasonic bath 2 enhances the penetration of the substances produced near the cathode into the macro- and micropores of the ore particles contained in the corresponding ore container 30 .
- free hydrogen atoms are absorbed by platinum group metals (PGM) present in the ore particles, whereas this absorption is drastically increased by the ultrasonic bath 2 .
- PGM platinum group metals
- the electrolytic processing of the ore particles enhanced by the ultrasonic bath 2 and preferably comprising a number of alternated cycles, cleans and fills the macro- and micropores of the ore particles with substances generated in the electrolytic bath 1 , thereby preparing the ore particles for a next step of the method of the invention.
- the prepared ore particles which were submitted to the electrolytic bath enhanced by ultrasonic bath in a previous step of the method, are placed in a crucible 5 .
- the crucible 5 is preferably made of magnetite powder and fire clay.
- the crucible 5 containing the ore particles is introduced into an oven 4 , preferably a microwave oven, for shock heating of the ore particles, i.e. the ore particles are subjected to a very fast and important temperature increase.
- the temperature of the ore particles is for example elevated to a temperature between 200 and 300° C. within 60 to 180 seconds, preferably to 250° C. within 120 seconds.
- Shock heating of the ore particles is preferably performed in a microwave oven. Submitting the prepared ore particles to high power microwave radiations provokes high excitation of the heavy, semi-heavy and light water molecules in the ore particles, thereby rapidly increasing their temperature. Other technologies are however possible within the frame of the invention for shock heating the ore particles.
- the PGM also release the previously absorbed hydrogen at a high pressure, which also participates to the disintegration of the ore particles and to the release of nanoparticles of noble metals.
- reactive metal chlorides were used in the electrolytic bath, then, during shock heating, different salts, including for example bicarbonates, and alkalines which have dissolved in the electrolyte bath and have penetrated the macro- and micropores of the ore particles react with ore substances causing various chemical reactions. As a result of these chemical reactions, some ore substances become soluble, thereby further participating to the disintegration of the ore and the release of noble metals.
- the shock microwave heating process for example lasts fifteen minutes at a microwave frequency of 2.45 GHz, the input power of the microwave radiation depending on the quantity of ore particles in the oven.
- the disintegrated ore particles and the released nanoparticles are submitted to a next step of separation of noble metals from the remaining ore, preferably to a mechanical step of separation.
- This step of separation according to a preferred embodiment of the invention is schematically illustrated in FIG. 3 .
- the step of separation uses gravity separation enhanced by ultrasounds.
- the disintegrated ore preferably together with the remaining content of the crucible used for shock heating, is put into a preferably cone shaped container 7 made of a permeable material, for example a microporous nylon membrane.
- the filled cone shaped container 7 is placed into an ultrasonic bath 6 , preferably with its tip oriented towards the ground, for an ultrasonic induced gravity separation of the noble metals. Under the effect of the ultrasonic waves, the content of the container 7 is slightly agitated, and the noble metals and other by products tend to sink to the tip of the container 7 , while the remains of the disintegrated ore particles are pushed towards the top.
- separation technologies preferably mechanical technologies, are however possible within the frame of the invention.
- separation of noble metals and other byproducts from the remains of the disintegrated ore particles is made through centrifugation of the crucible's content. Separation can also be performed with the help of electrostatic, magnetic and/or chemically-based techniques.
- the remaining liquid from the electrolytic bath 1 and from the ultrasonic bath 6 and also the sludge, i.e. the remains of the disintegrated ore particles, are preferably tested for the presence of noble metals that are for example collected, i.e. separated, using similar or other separation techniques.
- the method of the invention for the recovery of noble metals and other byproducts by disintegration of ore using nontoxic multi-step processing allows for a very high recovery rate (95-99.9%) and does not use any toxic substances like cyanide or mercury, thereby being environmentally friendly.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP10164665.1 | 2010-06-01 | ||
| EP10164665 | 2010-06-01 | ||
| PCT/EP2010/064678 WO2011150984A1 (fr) | 2010-06-01 | 2010-10-01 | Procédé de récupération de métaux nobles et d'autres sous-produits à partir d'un minerai |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US20130146477A1 true US20130146477A1 (en) | 2013-06-13 |
Family
ID=42989639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/701,245 Abandoned US20130146477A1 (en) | 2010-06-01 | 2010-10-01 | Method for recovering noble metals and other byproducts from ore |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20130146477A1 (fr) |
| EP (1) | EP2576850B1 (fr) |
| CN (1) | CN102947472A (fr) |
| AP (1) | AP2012006649A0 (fr) |
| AU (1) | AU2010354435A1 (fr) |
| CA (1) | CA2800694A1 (fr) |
| EA (1) | EA201291166A1 (fr) |
| WO (1) | WO2011150984A1 (fr) |
| ZA (1) | ZA201208874B (fr) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2907899B1 (fr) * | 2014-05-30 | 2016-07-27 | Nicolae Costache | Procédé pour la récupération de métaux et d'éléments non métalliques et métalliques à partir d'objets contenant des composés organiques |
| CA3255360A1 (fr) * | 2022-03-16 | 2023-09-21 | Flsmidth A/S | Système et procédé de commande ou d'élimination de dépôts durs sur des cathodes d'extraction électrolytique |
| WO2025205275A1 (fr) * | 2024-03-26 | 2025-10-02 | 日本製鉄株式会社 | Minerai de fer en poudre |
| JP7719425B1 (ja) * | 2024-03-26 | 2025-08-06 | 日本製鉄株式会社 | 粉末状の鉄鉱石 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB497835A (en) * | 1937-05-21 | 1938-12-21 | William Henry Vale Junior | A process for the separation of metals or metal compounds |
| US3772003A (en) * | 1972-02-07 | 1973-11-13 | J Gordy | Process for the electrolytic recovery of lead, silver and zinc from their ore |
| US4382845A (en) * | 1981-08-10 | 1983-05-10 | Chevron Research Company | Selective electrowinning of palladium |
| US4406752A (en) * | 1981-11-12 | 1983-09-27 | General Electric Company | Electrowinning of noble metals |
| US4510027A (en) * | 1981-04-15 | 1985-04-09 | Freeport Minerals Company | Simultaneous leaching and electrodeposition of precious metals |
| US20080302671A1 (en) * | 2007-06-07 | 2008-12-11 | David Pearce | Sequential lixivation and precipitation of metals from refractory ores by utilising variable oxidation reduction potentials and a variable PH system |
| US20090071840A1 (en) * | 2006-04-17 | 2009-03-19 | Rafael Calif | Method for extracting metals from ore |
| US20090145774A1 (en) * | 2007-12-08 | 2009-06-11 | Comsats Institute Of Information Technology | Novel Sonoelectrolysis for Metal Removal |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4139432A (en) * | 1976-08-16 | 1979-02-13 | Ghiringhelli Hugh A | Process for electrochemically recovering precious metals from ores |
| PH21188A (en) * | 1985-09-10 | 1987-08-12 | Butler Dean | Leaching process |
| GB8720279D0 (en) * | 1987-08-27 | 1987-10-07 | Tetronics Res & Dev Co Ltd | Recovery of gold |
| CN1194109C (zh) * | 2002-05-20 | 2005-03-23 | 严卓理 | 含砷硫有毒难处理物的金矿砂的超声预处理方法 |
| RU2263152C1 (ru) * | 2004-04-29 | 2005-10-27 | Галайко Владимир Васильевич | Способ извлечения золота при гидромеханизированной разработке песков глинистых россыпей и валунчатых окисленных руд кор выветривания |
| CN1304612C (zh) * | 2005-09-01 | 2007-03-14 | 徐致钢 | 从含铂族金属矿石中提取铂族金属的工艺 |
| CL2008003423A1 (es) | 2008-11-18 | 2010-10-29 | Rb Ingenieria Ltda | Proceso para tratar concentrados sulfurados de cobre en celda de dos camaras, anodica y catodica, con primera y segunda membranas, respectivamente, donde el electrolito, combinacion de h2so4 y hci con agua, se cargan en ambas camaras y el concentrado se carga en la camara anodica, donde se generan ondas ultrasonicas; y celda. |
-
2010
- 2010-10-01 WO PCT/EP2010/064678 patent/WO2011150984A1/fr not_active Ceased
- 2010-10-01 EP EP10760350.8A patent/EP2576850B1/fr active Active
- 2010-10-01 AP AP2012006649A patent/AP2012006649A0/xx unknown
- 2010-10-01 CA CA2800694A patent/CA2800694A1/fr not_active Abandoned
- 2010-10-01 US US13/701,245 patent/US20130146477A1/en not_active Abandoned
- 2010-10-01 CN CN2010800676122A patent/CN102947472A/zh active Pending
- 2010-10-01 EA EA201291166A patent/EA201291166A1/ru unknown
- 2010-10-01 AU AU2010354435A patent/AU2010354435A1/en not_active Abandoned
-
2012
- 2012-11-26 ZA ZA2012/08874A patent/ZA201208874B/en unknown
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB497835A (en) * | 1937-05-21 | 1938-12-21 | William Henry Vale Junior | A process for the separation of metals or metal compounds |
| US3772003A (en) * | 1972-02-07 | 1973-11-13 | J Gordy | Process for the electrolytic recovery of lead, silver and zinc from their ore |
| US4510027A (en) * | 1981-04-15 | 1985-04-09 | Freeport Minerals Company | Simultaneous leaching and electrodeposition of precious metals |
| US4382845A (en) * | 1981-08-10 | 1983-05-10 | Chevron Research Company | Selective electrowinning of palladium |
| US4406752A (en) * | 1981-11-12 | 1983-09-27 | General Electric Company | Electrowinning of noble metals |
| US20090071840A1 (en) * | 2006-04-17 | 2009-03-19 | Rafael Calif | Method for extracting metals from ore |
| US20080302671A1 (en) * | 2007-06-07 | 2008-12-11 | David Pearce | Sequential lixivation and precipitation of metals from refractory ores by utilising variable oxidation reduction potentials and a variable PH system |
| US20090145774A1 (en) * | 2007-12-08 | 2009-06-11 | Comsats Institute Of Information Technology | Novel Sonoelectrolysis for Metal Removal |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2010354435A1 (en) | 2012-12-20 |
| EP2576850A1 (fr) | 2013-04-10 |
| CN102947472A (zh) | 2013-02-27 |
| AP2012006649A0 (en) | 2012-12-31 |
| WO2011150984A1 (fr) | 2011-12-08 |
| EA201291166A1 (ru) | 2013-06-28 |
| ZA201208874B (en) | 2013-08-28 |
| CA2800694A1 (fr) | 2011-12-08 |
| EP2576850B1 (fr) | 2015-03-04 |
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