CN114599805A - Method for obtaining platinum and/or ruthenium - Google Patents
Method for obtaining platinum and/or ruthenium Download PDFInfo
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- CN114599805A CN114599805A CN202080077197.2A CN202080077197A CN114599805A CN 114599805 A CN114599805 A CN 114599805A CN 202080077197 A CN202080077197 A CN 202080077197A CN 114599805 A CN114599805 A CN 114599805A
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- ruthenium
- ozone
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910052697 platinum Inorganic materials 0.000 title claims abstract description 43
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910052707 ruthenium Inorganic materials 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 23
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 33
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000007858 starting material Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 230000002829 reductive effect Effects 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims 1
- 239000000243 solution Substances 0.000 description 50
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 12
- MUMZUERVLWJKNR-UHFFFAOYSA-N oxoplatinum Chemical compound [Pt]=O MUMZUERVLWJKNR-UHFFFAOYSA-N 0.000 description 11
- 229910003446 platinum oxide Inorganic materials 0.000 description 11
- 239000003054 catalyst Substances 0.000 description 9
- 229910001925 ruthenium oxide Inorganic materials 0.000 description 8
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 8
- 238000004090 dissolution Methods 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- ZFBIHEFLSPUZGE-UHFFFAOYSA-H ruthenium(3+);hexachloride Chemical class [Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Ru+3] ZFBIHEFLSPUZGE-UHFFFAOYSA-H 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229920000554 ionomer Polymers 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- -1 platinum cations Chemical class 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000009918 complex formation Effects 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920005597 polymer membrane Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
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Classifications
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- 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
-
- 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
- C22B11/046—Recovery of noble metals from waste materials from manufactured products, e.g. from printed circuit boards, from photographic films, paper or baths
-
- 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
- C22B11/06—Chloridising
-
- 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
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/10—Hydrochloric acid, other halogenated acids or salts thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/54—Reclaiming serviceable parts of waste accumulators
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Inert Electrodes (AREA)
Abstract
The invention relates to a method for obtaining platinum and/or ruthenium. This includes providing a solution (11) of ethanol in water, introducing at least one starting material (20) into the solution (12), introducing HCl into the solution (14), and introducing ozone into the solution (16) multiple times.
Description
The invention relates to a method for obtaining platinum and/or ruthenium. This is particularly useful for recovering platinum from fuel cells.
Prior Art
Platinum is an important raw material, which is used in particular for membrane electrode units (membrane electrode assemblies; MEAs). The membrane electrode unit represents the core component of a fuel cell. It consists of a central polymer membrane, two catalyst layers (with platinum disposed therein) on each side, and two carbon layers on each side. A fuel cell stack contains more than 100 such MEAs. The fuel cell stack is composed of carbon to an extent of more than 80 wt.%, but still contains about 30 grams of precious metal. Recovery of platinum and other precious metals may be carried out by pyrometallurgical or hydrometallurgical means.
In hydrometallurgical recovery, the metal to be recovered enters the aqueous solution through complex formation. An example of such a method is described in the article N, Hodnik, C, Baldizzone, "Platinum recycling green via induced surface potential alteration enhancing fast and influencing resolution", 2016, Nature Communications, Vol.7. In this case, platinum can pass from the industrial catalyst via the chloride as complexing agent into the hydrochloric acid solution. Here, ozone is used as the oxidizing agent and carbon monoxide is used as the reducing agent alternately, to thereby achieve instantaneous dissolution of platinum.
DISCLOSURE OF THE INVENTION
In a method for obtaining platinum and/or ruthenium, in particular platinum, a solution of an alcohol in water is provided. At least one starting material which contains platinum and/or ruthenium and from which platinum and/or ruthenium are to be obtained is introduced into the solution. In particular, the starting material is MEA or a fragment thereof. The alcohol is suitable to dissolve the ionomer binder that bonds the platinum-based and/or ruthenium-based catalyst, the carbon layer and the film to each other within a few minutes. In this way, a suspension can be obtained in which the catalyst is present separately from the other constituents of the MEA.
HCl was then introduced into the solution. This can be carried out in particular by adding hydrochloric acid. In this way, the pH of the solution is lowered, which stabilizes the hexachloroplatinate (IV) salt complex and the hexachlororuthenate (III) salt complex.
Finally, multiple oxidation steps are performed by introducing ozone into the solution. The ozone can surface oxidize the platinum and/or ruthenium contained in the catalyst in an acidic solution. In this case, the platinum and/or ruthenium are dissolved instantaneously and form soluble hexachloroplatinate (IV) salt complexes and/or hexachlororuthenate (III) salt complexes. Once the catalyst is completely covered with the platinum oxide layer and/or the ruthenium oxide layer, no further platinum and/or ruthenium goes into solution. In conventional transient dissolution processes of noble metals, as described for example by n. Hodnick and c. Baldizzone in the above mentioned article, it is now necessary to add a reducing agent to the solution in order to reduce the platinum oxide layer and/or the ruthenium oxide layer again. This is not necessary in the present method. This is because the alcohol plays a dual role in the process. It not only acts as a solvent for dissolving the ionomer binder, but also acts as a reducing agent with respect to platinum oxide and/or ruthenium oxide in a hydrochloric acid solution and in the absence of ozone. After the ozone introduction has ended, the reduction of platinum oxide and/or ruthenium oxide therefore takes place on the catalyst surface, and further platinum and/or ruthenium enters the solution as hexachloroplatinate (IV) and/or hexachlororuthenate (III) instantaneously, until the platinum surface and/or the ruthenium surface again becomes free of platinum oxide and/or ruthenium oxide. At this point, the dissolution of platinum and/or ruthenium again ceases and ozone must be reintroduced into the solution to introduce further platinum and/or ruthenium into the solution.
The alcohol is preferably selected from methanol, ethanol and isopropanol. Ethanol is particularly preferred. The concentration of alcohol in the provided solution is preferably greater than 50% by weight. This enables the ionic binder to dissolve quickly. In contrast, for the reduction of platinum oxide and/or ruthenium oxide, a concentration of 10 to 20% by weight is sufficient. Therefore, in order to reduce the process costs, it is preferred to reduce the alcohol concentration in the solution to a value in this range after the introduction of the at least one starting material and before the first introduction of ozone. This can be carried out in particular by diluting the solution with water.
When HCl is introduced, the HCl concentration in the solution is preferably adjusted to a value of 0.05 mol/l to 0.50 mol/l. An optimum pH for oxidizing platinum and/or ruthenium with ozone is thereby obtained.
After the introduction of the at least one starting material and before the first introduction of ozone, it is further preferred to introduce sodium chloride into the solution in a concentration of 0.5 mol/l to 5.0 mol/l. The chloride ion concentration in the solution is thereby increased, so that a large amount of platinum in the form of hexachloroplatinate (IV) salt complex and/or a large amount of ruthenium in the form of hexachlororuthenate (III) salt complex can thereby be stabilized in the solution.
The ozone is preferably introduced into the solution in the form of an ozone/oxygen mixture. This mixture can be produced in a simple manner by means of an ozone generator.
When ozone is introduced into the solution, it is preferable to adjust the concentration of ozone in the solution to not more than 5% by weight. The higher ozone concentration no longer contributes significantly to the oxidation of platinum and/or ruthenium, but rather leads primarily to the oxidation of the alcohol.
Each introduction is preferably carried out for a period of time of from 30 seconds to 30 minutes, respectively. In the case of a catalyst material as is commonly used in MEAs, such a period of time is sufficient for the entire platinum surface to be covered by a platinum oxide layer and/or the entire ruthenium surface to be covered by a ruthenium oxide layer. Therefore, further introduction of ozone does not cause oxidation of platinum and/or ruthenium, but only oxidation of alcohol.
Between the two introductions of ozone into the solution, the solution is preferably purged in each case with an inert gas, such as, in particular, nitrogen or argon. In this way, the ozone still present in the solution is rapidly expelled from the solution. This is advantageous because the reduction of platinum oxide and/or ruthenium oxide only begins when the solution is free of ozone, and before this a redox reaction takes place between the alcohol and the remaining ozone.
Platinum and/or ruthenium can be obtained from the solution by reduction. For this purpose, in particular after ozone has been introduced into the solution a predetermined number of times (after which no further platinum and/or ruthenium can be expected to re-enter the solution), the remaining solid material can be filtered out of the solution and the solution can then be treated, for example with hydrogen or another reducing agent, to thereby precipitate the metallic platinum and/or ruthenium from the solution.
Brief Description of Drawings
Embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description.
Fig. 1 shows a flow chart of an embodiment of a method according to the invention.
Fig. 2 schematically shows the instantaneous dissolution of platinum in an embodiment of the method according to the invention.
Examples of the invention
As shown in fig. 1, after the start 10 of an embodiment of the method according to the invention, a solution of 11 ethanol in water is first provided. In this example, the solution contained 90 wt% ethanol and 10 wt% water. Thereafter, the starting material 20 is introduced 12 into the solution in the form of a comminuted MEA. The solution was stirred for 10 minutes, wherein the ionomer binder of the MEA entered the solution and the MEA sections thereby decomposed into catalyst, carbon and membrane.
The solution was then diluted 13 with water until its ethanol content was reduced to 20 wt.%. Hydrochloric acid is subsequently added 14 so much that the HCl concentration in the solution is 0.1 mol/l and its pH is lowered to 1 in particular. In addition, 15 so many sodium chloride was added that the solution contained 1 mol/l sodium chloride. Thereafter, instantaneous dissolution of platinum from the starting material 20 is started.
A mixture of oxygen and ozone generated by means of a corona effect is introduced 16 for a period of 10 minutes, wherein care is taken that the ozone concentration in the solution does not rise to more than 5% by weight. The solution is then flushed 17 with nitrogen. After another 10 minutes, 16 ozone additions were repeated. As shown in fig. 2, upon treatment of metallic platinum 21 with ozone, platinum cations go into solution, which is immediately stabilized as hexachloroplatinate (IV) salt complex. Here, a platinum oxide layer 22 is gradually formed on the surface of the platinum 21 until the surface is completely covered and the dissolution of the platinum 21 is finished. Once the remaining ozone has been expelled from the solution, the ethanol begins to reduce the platinum oxide layer 22, with platinum cations re-entering the solution. The reduction step is ended when the entire platinum surface is free of platinum oxide 22. Thereafter, the next oxidation step is started by reintroducing ozone into the 16 solution. These steps are repeated so long until inspection 18 shows that the platinum 21 has completely dissolved. In the present embodiment, it is checked in a check 18 whether a predetermined number of oxidation and reduction cycles have elapsed (after which complete dissolution of the platinum 21 is expected). The process then ends 19, in which the residue of the starting material 20 is filtered off from the solution and the solution is passed to a reductive work-up. The metal platinum can be precipitated by reduction by introducing hydrogen into the solution.
Claims (9)
1. A process for obtaining platinum and/or ruthenium, comprising the following steps:
a) providing a solution (11) of an alcohol in water,
b) introducing at least one starting material (20) comprising platinum and/or ruthenium into the solution (12),
c) HCl is introduced into the solution (14),
d) ozone is introduced into the solution (16) a plurality of times.
2. The method according to claim 1, characterized in that the alcohol concentration in step a) is more than 50% by weight and is reduced between step b) and step d) to a concentration (13) of 10 to 20% by weight.
3. The method according to claim 1 or 2, characterized in that the HCl concentration in the solution in step c) is adjusted to a value of 0.05 to 0.50 mol/l.
4. The method according to any one of claims 1 to 3, characterized in that, between step b) and step d), NaCl is introduced into the solution (15) at a concentration of 0.5 to 5.0 mol/l.
5. A method according to any one of claims 1 to 4, characterized in that ozone is introduced into the solution in the form of an ozone/oxygen mixture.
6. The method according to any one of claims 1 to 5, wherein the concentration of ozone in the solution in step d) is at most 10 wt.%.
7. The method according to any one of claims 1 to 6, characterized in that each introduction (16) is carried out for a period of time of 30 seconds to 30 minutes, respectively.
8. The method according to any one of claims 1 to 7, characterized in that the solution (17) is purged with at least one inert gas between two ozone introductions (16), respectively.
9. The method according to any one of claims 1 to 8, characterized in that the platinum and/or ruthenium are obtained from the solution by reduction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019217188.5 | 2019-11-07 | ||
| DE102019217188.5A DE102019217188A1 (en) | 2019-11-07 | 2019-11-07 | Process for the extraction of platinum and / or ruthenium |
| PCT/EP2020/076755 WO2021089233A1 (en) | 2019-11-07 | 2020-09-24 | Method for obtaining platinum and/or ruthenium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114599805A true CN114599805A (en) | 2022-06-07 |
Family
ID=72659238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080077197.2A Pending CN114599805A (en) | 2019-11-07 | 2020-09-24 | Method for obtaining platinum and/or ruthenium |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4055198A1 (en) |
| CN (1) | CN114599805A (en) |
| DE (1) | DE102019217188A1 (en) |
| WO (1) | WO2021089233A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011102418A (en) * | 2009-11-11 | 2011-05-26 | Eco-System Recycling Co Ltd | Separation method for platinum and ruthenium |
| JPWO2012029379A1 (en) * | 2010-09-03 | 2013-10-28 | Jx日鉱日石金属株式会社 | High-purity platinum recovery method |
| CN105229203A (en) * | 2013-04-11 | 2016-01-06 | 赛丹思科大学 | For reclaiming the method for platinum metals from catalytic structure |
| US20180347008A1 (en) * | 2015-10-27 | 2018-12-06 | Max-Planck-Institut Für Eisenforschung GmbH | Method for the Recovery of Precious Metal |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3935798A1 (en) * | 1989-10-27 | 1991-05-02 | Basf Ag | METHOD FOR OBTAINING RUTHENIUM TETROXIDE BY OXIDATION OF AQUEOUS SOLUTIONS OF ALKALI RUTHENATES |
| DE10000274C1 (en) * | 2000-01-05 | 2001-05-03 | Heraeus Gmbh W C | Process for recovering osmium and ruthenium from precious metal concentrates comprises collecting osmium tetroxide in an absorption solution and leaching out ruthenium with an agent |
| 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 |
| ES2462496T3 (en) * | 2008-12-30 | 2014-05-23 | Basf Se | Ruthenium recovery procedure from used catalysts containing ruthenium oxide |
-
2019
- 2019-11-07 DE DE102019217188.5A patent/DE102019217188A1/en active Pending
-
2020
- 2020-09-24 WO PCT/EP2020/076755 patent/WO2021089233A1/en unknown
- 2020-09-24 EP EP20780670.4A patent/EP4055198A1/en active Pending
- 2020-09-24 CN CN202080077197.2A patent/CN114599805A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011102418A (en) * | 2009-11-11 | 2011-05-26 | Eco-System Recycling Co Ltd | Separation method for platinum and ruthenium |
| JPWO2012029379A1 (en) * | 2010-09-03 | 2013-10-28 | Jx日鉱日石金属株式会社 | High-purity platinum recovery method |
| CN105229203A (en) * | 2013-04-11 | 2016-01-06 | 赛丹思科大学 | For reclaiming the method for platinum metals from catalytic structure |
| US20180347008A1 (en) * | 2015-10-27 | 2018-12-06 | Max-Planck-Institut Für Eisenforschung GmbH | Method for the Recovery of Precious Metal |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021089233A1 (en) | 2021-05-14 |
| EP4055198A1 (en) | 2022-09-14 |
| DE102019217188A1 (en) | 2021-05-12 |
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