EP3797178A1 - Method and device for extracting gold and/or silver and/or at least one platinum group metal - Google Patents
Method and device for extracting gold and/or silver and/or at least one platinum group metalInfo
- Publication number
- EP3797178A1 EP3797178A1 EP19723352.1A EP19723352A EP3797178A1 EP 3797178 A1 EP3797178 A1 EP 3797178A1 EP 19723352 A EP19723352 A EP 19723352A EP 3797178 A1 EP3797178 A1 EP 3797178A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- electrolyte solution
- starting materials
- circulation line
- silver
- 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.)
- Pending
Links
Classifications
-
- 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
-
- 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/42—Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
-
- 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
-
- 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
- C22B11/042—Recovery of noble metals from waste materials
- C22B11/048—Recovery of noble metals from waste materials from spent catalysts
-
- 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/02—Apparatus therefor
-
- 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
- C22B3/46—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the present invention relates to an apparatus for recovering gold and / or silver and / or at least one platinum metal
- the present invention relates to a process for the recovery of gold and / or silver and / or at least one
- Gold, silver and platinum metals such as platinum, palladium, ruthenium, rhenium and iridium are essential raw materials.
- Their recovery from scrap metals, for example, as part of catalyst materials or electronic devices can be done pyrometallurgisch or hydrometallurgisch. The pyrometallurgical recovery takes place by melting the scrap metal and then processing it by various methods. However, this is very energy intensive and associated with the generation of toxic emissions.
- Complexing agent can be recovered at a pH of 1.
- Recovery of ruthenium and iridium with chloride as complexing agent can in the pH range from 13 to 14. This is alternately a
- Oxidizing agent and a Reduktionsmitel used.
- the apparatus for recovering gold and / or silver and / or at least one platinum metal from starting materials comprises a container adapted to receive the starting materials and to receive an electrolyte solution.
- Platinum metals (PGM) are understood as meaning the light platinum metals ruthenium, rhodium and palladium and the heavy platinum metals osmium, iridium and platinum.
- Electrolyte solution is in particular an aqueous solution which contains chloride anions, bromide anions and / or iodide anions as complexing agent for gold and / or silver and / or at least one platinum metal.
- Electrolytic solution may be included, for example, as alkali chlorides, alkali bromides and / or alkali metal iodides.
- the pH of the electrolyte solution can be selected depending on the complexing agents. When using alkali chlorides, a pH of less than 3 is preferred. When using alkali metal iodides, in particular pH values of up to 10 can be provided.
- At least one gas outlet is arranged on an upper side of the container.
- the device has at least one circulation line with an introduction and a discharge.
- the introduction and the discharge are each arranged on the container.
- the introduction and the discharge are intended to initiate from the circulation line electrolyte solution through the introduction into the container and to derive through the derivative again from this.
- Circulation line allows a continuous or discontinuous exchange of the electrolyte solution in the container.
- introduction or the discharge is arranged at or next to the top of the container and the other of these elements is arranged at or next to the bottom of the container, wherein the underside of the top opposite.
- At least one gas inlet is arranged in the circulation line.
- An oxidizing agent source is at least one such
- Gas inlet connected. It represents in particular ozone as gaseous
- a reducing agent source is at least one Gas inlet connected, which may be the same or a different gas introduction than that, which provides the oxidizing agent.
- the reducing agent source supplies the gas inlet in particular with hydrogen as a gaseous reducing agent. It is also preferred that the
- Apparatus further comprises an inert gas source and / or a carbon monoxide source, which is connected in each case with at least one gas inlet.
- the inert gas source in particular provides nitrogen or a noble gas.
- the device is capable of allowing recovery of gold and / or silver and / or at least one platinum metal from the starting materials, with transient dissolution of the metals by alternate oxidation and reduction.
- Metal cations are complexed by the anions of the electrolyte solution in solution and thus stabilized.
- the inert gas source may be used to remove oxidant from the electrolyte solution
- carbon monoxide is advantageous because carbon monoxide is a strong reducing agent for platinum complexes.
- carbon monoxide adsorbs on platinum surfaces and thus prevents the precipitation of the platinum upon introduction of the reducing agent in the
- the starting materials are placed in the container and covered with the electrolyte solution.
- the electrolyte solution is continuously or discontinuously circulated through the circulation line.
- at least one gas introduction at least one gaseous oxidizing agent and at least one gaseous reducing agent are alternately introduced into the electrolyte solution, so that the
- a Meta Ilextraktor is arranged, which is adapted to salts of gold and / or silver and / or at least to bind a platinum metal.
- metal ion extractor is located upstream of the gas inlet in the circulation line. In this way, always first metal ion complexes from the
- Adsorbent in particular activated carbon.
- Embodiment is the metal extra ktor to a device for the electrochemical cementation of metals.
- Embodiment is the metal extra ktor to a device for the electrochemical cementation of metals.
- Silver cations and / or platinum metal cations is.
- the container is as
- Distillation column formed with multiple floors or shelves. Distillation columns are used in the chemical industry for distillative
- the starting materials are placed on the bottoms of the distillation column when using a device according to the first embodiment becomes.
- the starting materials are immobilized and the
- Distillation column is then filled via the circulation line with the electrolyte solution. This allows a good contact of the
- Oxidizing agent or reducing agent Oxidizing agent or reducing agent.
- the container is designed as a heterogeneous reactor. This allows the uptake of large quantities of starting materials which can be suspended in the container in the electrolyte solution.
- the introduction for the electrolyte solution be at or near the bottom of the container and the discharge be at or near its top.
- the process may be carried out so that the starting materials are in the form of particles smaller than 0.1 mm, the particles constituting at most 10% by volume of the total volume of the electrolytic solution and the particles.
- Such fine and so finely divided particles can form a suspension with the electrolyte solution throughout the container, thereby reducing the total
- Container volume can be made a contact between the starting materials, the electrolyte solution and the gases introduced.
- the container is designed as a bed reactor, in particular as a fixed bed reactor (FBR), moving bed reactor (MBR) or rotating bed reactor (RBR).
- FBR fixed bed reactor
- MLR moving bed reactor
- RBR rotating bed reactor
- a granulate of the starting materials can be fixed and simultaneously treated in a stream of the electrolyte solution.
- the basket may be rotatably arranged in a rotary bed reactor.
- the starting materials should be in the form of particles larger than 0.2 mm. Unlike the use of the heterogeneous reactor, such large particles no longer form a suspension throughout
- Electrolyte solution but always fall back to the bottom of the container or to the bottom of the basket.
- the bed reactor allows a larger amount of starting materials to be placed in a container of a given size than is possible in the heterogeneous reactor.
- the particles can make up 20 to 40% by volume of the total volume of the electrolyte solution and the particles.
- connection arranged next to the underside is located closer to the underside in the side wall than to the top side and a connection arranged next to the top side is located closer to the upper side than to the lower side in the side wall.
- Fig. 1 shows a schematic cross-sectional view of a device
- Fig. 2 shows a schematic cross-sectional view of a device
- FIG. 3 shows a schematic cross-sectional view of a device according to a third embodiment of the invention.
- an apparatus for recovering gold and / or silver and / or at least one platinum metal from starting materials 11 comprises a container 20 in the form of a
- the container 20 has an upper side 21 and a lower side 22.
- a gas discharge line 30 is arranged on the upper side 21 of the container 20. This gas discharge 30 simultaneously acts as the introduction 41 of a circulation line 40.
- Circulation line 40 is arranged adjacent to the underside 22 of the container 20 in its side wall.
- An electrolyte reservoir 43 is via a first
- Three-way valve 44 connected to the circulation line 40 and a second three-way valve 45 connects the circulation line 40 above the gas discharge 30 with an outlet 46.
- a gas inlet 50 in the form of a Venturi nozzle is arranged in the circulation line 40. This is connected to an ozonizer as the oxidant source 51 and to a reductant source 52 adapted to introduce hydrogen and which also has an unillustrated nitrogen source and carbon monoxide source.
- a third three-way valve 53 is arranged, via which only either the oxidant source 51 or the reducing agent source 52 is always connected to the gas inlet 50.
- a Meta Ilextraktor 60 is arranged between the first three-way valve 44 and the gas inlet 50.
- the distillation column has three plates 71,
- Starting materials 11 initially placed on the floors 71, 72, 73. These starting materials 11 were obtained from the comminution of a fuel cell. From the electrolyte reservoir 43, an electrolytic solution containing 3 mol / l NaCl and 0.001 mol / l HCl and having a pH of 3 is passed through the first three-way valve 44 into the circulation passage 40. It passes the Meta Ilextraktor 60, which is set up to be dissolved in the electrolyte solution To bind metal ions by ion exchange. Since the electrolyte solution at the beginning of the process still contains no metal ions, it does not interact with the metal ion extractor 60.
- the gas inlet 50 By means of the gas inlet 50, it is enriched with ozone generated by the ozonizer 51 and then passed through the second three-way valve 45 into the container 20. It fills the container 20 so that the ozone can react with the starting materials 11, with metal ions going into solution as complexes. During the reaction, the second three-way valve 45 is opened so that gases escaping from the electrolyte solution through the
- Gas outlet 30 can reach the outlet 46 to leave the device there.
- the outlet 46 is connected to an ozone decomposer, not shown.
- the electrolyte solution is in turn passed through the circulation line 40 in the Meta Ilextraktor 60, so now complexed metal ions are bound. Subsequently, the now circulated electrolyte solution by means of the gas inlet 50 in a
- Flushing step added with nitrogen to expel remaining in the container 20 ozone residues from this. Then, in a reduction step, a mixture of hydrogen and carbon monoxide by means of the gas inlet 50 in the
- Electrolyte solution initiated and these reducing agents are with the
- the container 20 is designed as a heterogeneous reactor.
- the introduction 41 of the circulation line 40 is arranged in the underside of the container 20 and the discharge line 42 is arranged in its side wall next to its upper side 41.
- the gas outlet 30 is located at the top 21 of the container 20 and is not connected to the circulation line 40.
- the Circulation line 40 has neither three-way valves 44, 45 nor a
- Electrolyte reservoir 43 on.
- the gas inlet 50 which as in the first
- Embodiment is carried out downstream of the Meta Ilextraktors 60 is arranged in the circulation line 40.
- An unillustrated branch from the circulation passage 40 in the vicinity of the inlet 41 makes it possible to scavenge particles of the starting materials 11 smaller than 0.1 mm into the container 20 together with the electrolytic solution 12 until it is filled with the electrolytic solution 12 , The particles make the
- the container 20 is designed as a rotary bed reactor. As shown in Fig. 3, this embodiment of the device differs from the second embodiment, first, in that the introduction 41 and the discharge line 42 are interchanged with each other and that in the container 20, a closed basket 80 is arranged. This receives the starting materials 11 and fixes them.
- the starting materials 11 arranged in the basket 80 are in the form of granular particles larger than 0.2 mm.
- the meshes of the basket 80 are smaller than 0.2 mm, so that the particles can not leave the basket 80 either up or down.
- Starting materials 11 and the electrolyte solution 12 in the container 20 in the present embodiment is 30 vol .-%.
- Gas treatment in the process for recovering gold and / or silver and / or at least one platinum metal is carried out using this apparatus in the same manner as in the first embodiment, and metal ions are bound in the same manner by means of the metal extractor 60.
- the basket 80 is thereby rotated in the flow of the electrolyte solution 12 about its longitudinal axis.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018208079.8A DE102018208079A1 (en) | 2018-05-23 | 2018-05-23 | Method and apparatus for recovering gold, silver and platinum metals |
PCT/EP2019/061631 WO2019223996A1 (en) | 2018-05-23 | 2019-05-07 | Method and device for extracting gold and/or silver and/or at least one platinum group metal |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3797178A1 true EP3797178A1 (en) | 2021-03-31 |
Family
ID=66484022
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19723352.1A Pending EP3797178A1 (en) | 2018-05-23 | 2019-05-07 | Method and device for extracting gold and/or silver and/or at least one platinum group metal |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3797178A1 (en) |
CN (1) | CN112119171A (en) |
DE (1) | DE102018208079A1 (en) |
WO (1) | WO2019223996A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021211142A1 (en) * | 2021-10-04 | 2023-04-06 | Robert Bosch Gesellschaft mit beschränkter Haftung | Ball mill and process for obtaining at least one metal |
CN115572831B (en) * | 2022-10-14 | 2023-10-24 | 陕西理工大学 | Catalytic reaction equipment |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3957505A (en) * | 1974-08-05 | 1976-05-18 | Bayside Refining And Chemical Company | Gold reclamation process |
US5250273A (en) * | 1990-01-18 | 1993-10-05 | Canadian Liquid Air Ltd - Air Liquide Canada Ltee | Hydrometallurgical leaching process and apparatus |
IT1306811B1 (en) * | 1999-07-30 | 2001-10-02 | Ct Sviluppo Materiali Spa | METAL DISSOLUTION PROCEDURE IN A SOLUTION TO PERREALIZE AN ELECTROLYTIC DEPOSITION AND DISSOLUTION SYSTEM |
ES2184630B1 (en) * | 2001-08-03 | 2004-01-16 | Soc Es Carburos Metalicos Sa | METHODS OF SELECTIVE LIXIVIATION OF METALS. |
DE102005061954A1 (en) * | 2005-12-23 | 2007-07-05 | Basf Ag | Recycling of ruthenium from an used ruthenium catalyst comprises treating the catalyst containing ruthenium oxide in a hydrogen stream and treating the carrier material containing ruthenium metal with hydrochloric acid |
US20140230604A1 (en) * | 2011-10-04 | 2014-08-21 | Fine Gold Recovery Pty Ltd. | Recovery of metals from ores |
CN102560128B (en) * | 2012-03-05 | 2013-10-09 | 武汉凯迪工程技术研究总院有限公司 | Method for recovering ruthenium from waste aluminum oxide loaded ruthenium catalyst |
CN104263945A (en) * | 2014-10-08 | 2015-01-07 | 昆明贵金属研究所 | Method for recovering platinum metal from waste catalyst |
CN204918700U (en) * | 2015-07-17 | 2015-12-30 | 中南大学 | A oxidation treatment device for gold mine |
DE102015118279A1 (en) * | 2015-10-27 | 2017-04-27 | Max-Planck-Institut Für Eisenforschung GmbH | Process for recovering precious metals |
-
2018
- 2018-05-23 DE DE102018208079.8A patent/DE102018208079A1/en active Pending
-
2019
- 2019-05-07 EP EP19723352.1A patent/EP3797178A1/en active Pending
- 2019-05-07 CN CN201980034298.9A patent/CN112119171A/en active Pending
- 2019-05-07 WO PCT/EP2019/061631 patent/WO2019223996A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
CN112119171A (en) | 2020-12-22 |
DE102018208079A1 (en) | 2019-11-28 |
WO2019223996A1 (en) | 2019-11-28 |
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