CN114134336A - Low-cost reducing agent for selective precipitation of noble metal ions - Google Patents
Low-cost reducing agent for selective precipitation of noble metal ions Download PDFInfo
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- CN114134336A CN114134336A CN202111472217.9A CN202111472217A CN114134336A CN 114134336 A CN114134336 A CN 114134336A CN 202111472217 A CN202111472217 A CN 202111472217A CN 114134336 A CN114134336 A CN 114134336A
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- 229910000510 noble metal Inorganic materials 0.000 title claims abstract description 52
- 150000002500 ions Chemical class 0.000 title claims abstract description 29
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 20
- 238000001556 precipitation Methods 0.000 title claims abstract description 14
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 59
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000010931 gold Substances 0.000 claims abstract description 35
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052737 gold Inorganic materials 0.000 claims abstract description 32
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 28
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 28
- 239000000126 substance Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 22
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 10
- -1 amide organic compounds Chemical class 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229910021645 metal ion Inorganic materials 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 2
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 claims description 2
- 229910001431 copper ion Inorganic materials 0.000 claims description 2
- 229910001453 nickel ion Inorganic materials 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 229910001432 tin ion Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 17
- 239000002699 waste material Substances 0.000 abstract description 12
- 238000011084 recovery Methods 0.000 abstract description 6
- 238000001914 filtration Methods 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 239000002244 precipitate Substances 0.000 abstract description 5
- 238000006479 redox reaction Methods 0.000 abstract description 3
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 150000002739 metals Chemical class 0.000 abstract description 2
- 230000033116 oxidation-reduction process Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 18
- 239000010970 precious metal Substances 0.000 description 10
- 238000009616 inductively coupled plasma Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000006228 supernatant Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- MUJIDPITZJWBSW-UHFFFAOYSA-N palladium(2+) Chemical compound [Pd+2] MUJIDPITZJWBSW-UHFFFAOYSA-N 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- OCKGFTQIICXDQW-ZEQRLZLVSA-N 5-[(1r)-1-hydroxy-2-[4-[(2r)-2-hydroxy-2-(4-methyl-1-oxo-3h-2-benzofuran-5-yl)ethyl]piperazin-1-yl]ethyl]-4-methyl-3h-2-benzofuran-1-one Chemical compound C1=C2C(=O)OCC2=C(C)C([C@@H](O)CN2CCN(CC2)C[C@H](O)C2=CC=C3C(=O)OCC3=C2C)=C1 OCKGFTQIICXDQW-ZEQRLZLVSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000005548 dental material Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hcl hcl Chemical compound Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- 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
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (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)
Abstract
A reducing agent for selective precipitation of low-cost noble metal ions belongs to the technical field of waste resource recovery. The invention selectively reduces and precipitates the noble metal (gold, platinum and palladium) ions in the solution containing the noble metal (gold, platinum and palladium) by a simple, effective and low-cost reducing agent to obtain the simple substance of the noble metal (gold, platinum and palladium). Based on the characteristic that the oxidation-reduction potential of noble metals (gold, platinum and palladium) is higher than that of common metals, the basic principle of oxidation-reduction reaction is utilized, the ions of the noble metals (gold, platinum and palladium) in the waste liquid are selectively reduced into simple substances by using an organic reducing agent, and then the simple substances are separated out by filtering, so that the recovery and the utilization are realized, the method is simple, and the process flow for recovering the noble metals (gold, platinum and palladium) is shortened. The used reducing agent is convenient and easy to obtain, has low price, reduces the application cost and is easy to realize large-scale production.
Description
Technical Field
The invention belongs to the technical field of waste resource recovery, and relates to a novel reducing agent for selective precipitation of noble metal (gold, platinum and palladium) ions in water.
Background
Gold (Au), platinum (Pt), and palladium (Pd), which are noble metals having excellent physical and chemical properties, are essential for many high-tech industries because they can be used as raw materials for catalysts, electronic products, fuel cells, and medicines, which are also well-known high-grade ornaments having extremely high economic value. However, the abundance of noble metals (gold, platinum, palladium) on earth is extremely low, and its rarity and high price greatly limit its further commercial development and application in various fields. On the one hand, the demand for noble metals has increased dramatically in recent years, far exceeding the supply. On the other hand, the waste containing precious metals is not sufficiently efficiently treated due to the limitations of the recovery technique, resulting in a large amount of precious metals being retained in the waste. Researchers are also looking for new alternatives to address the current dilemma, however, finding alternatives to precious metals would be a lengthy process and their actual performance needs to be examined in practice. Therefore, there is an urgent need to search for more efficient techniques for recovering precious metals from secondary resources to solve the current problems.
Solids (electronic and jewelry waste, spent catalysts and dental materials, anode mud, slag, fly ash, etc.), liquids (leachate, waste process fluid, industrial waste water, etc.) or slurries (sewage sludge, mine tailings, etc.) are potential sources of secondary precious metal resources. Two important liquid sources of precious metal ions are metal leach liquors and waste process liquors, which are aqueous solutions containing large amounts of precious metal ions. For leaching of precious metals from solids, reagents such as hydrochloric acid, hydrochloric acid-chloride, aqua regia and thiosulfuric acid have been used, such as for extracting precious metals from copper anode sludge, waste light emitting diodes and waste printed circuit boards. The concentration of noble metal ions in the metal leach solution is typically 2 to 1000 mg/l, and is typically several orders of magnitude less than other coexisting elements such as fe (iii), cu (ii), ni (ii), zn (ii), pb (ii), and al (iii). Meanwhile, in industrial processes such as semiconductor and printed circuit board manufacturing, gold melting, plating, etching, and the like, various waste process liquids including waste rinsing water, plating liquid, etchant, and the like are generated. Unlike metal leach liquors, spent process liquors typically contain from 15 to 5800 mg/l of precious metal ions, possibly in concentrations greater than, compatible with, or less than other co-existing elements, such as al (iii), cu (ii), ni (ii), zn (ii), and sn (iv). How to separate the noble metal ions from these coexisting ions is the core of research.
Today there are several methods for recovering noble metal ions from noble metal-containing liquids, such as solvent extraction, ion exchange and adsorption. Both have merits and are not perfect. The solvent extraction method requires the use of a large amount of hazardous organic solvents, easily pollutes the environment, and requires a long time because of the necessity of a plurality of extraction steps. Although the ion exchange method is cheap, simple and environment-friendly, the separation period is long and the elution is difficult. Adsorption is considered an effective and economical technique for recovering noble metal ions from solution due to its excellent performance and low production cost. In general, the ideal adsorbent should satisfy the following conditions: a large surface area; high adsorption capacity and selectivity; high chemical and mechanical stability; easy to separate, regenerate and reuse; the cost effectiveness is high. However, no suitable ideal adsorbent has been found.
Disclosure of Invention
The invention aims to obtain a noble metal simple substance by selectively reducing and precipitating noble metal ions in a noble metal-containing solution by a simple, effective and low-cost reducing agent.
The reducing agent used in the present invention is one or more of amide organic compounds (e.g., N-Dimethylformamide (DMF), N-Dimethylacetamide (DMA), etc.), ethanol, and methanol.
The method for selectively reducing the noble metal ions in the noble metal-containing solution to obtain the noble metal simple substance comprises the following steps:
(1) adding a reducing agent to the noble metal ion-containing solution in an amount not exceeding the volume of the solution.
(2) And sealing the container containing the liquid, putting the container into a baking oven at 50-70 ℃, and heating and preserving heat for 6-10 hours to obtain the noble metal simple substance.
The method is used for selectively reducing and precipitating the noble metal from the solution containing noble metal ions and coexisting ions such as copper ions, aluminum ions, nickel ions and tin ions to obtain the noble metal simple substance.
The principle of the invention is as follows: the oxidation-reduction potentials of gold, platinum and palladium in the noble metal are all higher than those of other common metals (such as copper, aluminum, nickel and tin) in the solution containing the noble metal. The higher the potential, the more oxidizing and more likely redox reactions occur. At a given temperature, amide organic compounds (such as N, N-Dimethylformamide (DMF), N-Dimethylacetamide (DMA) and the like), ethanol and methanol have reducibility and can perform redox reaction with noble metals, so that the noble metals can be selectively precipitated in the solution.
The invention has the beneficial effects that: almost all noble metal (gold, platinum and palladium) ions in the noble metal-containing liquid can be reduced into the noble metal simple substance, and then the noble metal simple substance is obtained by separating through filtration and is recycled, so that the process flow of noble metal recovery is greatly shortened. The maximum recovery rate of gold, palladium and platinum of 98.3%, 95.4% and 94.6% can be obtained by using the reducing agent of the invention, and the purity is detected to be more than 98.5%. The used reducing agent is easy to obtain, the price is low, the method is simple, the application cost is reduced, and the large-scale production is easy to realize.
Detailed Description
The present invention will be further described with reference to examples, in which reducing agents (amide-based organic compounds such as N, N-Dimethylformamide (DMF), N-Dimethylacetamide (DMA), etc.), ethanol and methanol) are used in an amount of 30% to 80% based on the amount of the noble metal ion-containing solution, but the present invention is not limited to the following examples.
Example 1 gold-containing ion solution was prepared according to the ratio of Au concentration 260.16mg/L, Cu concentration 203.52mg/L, Ni concentration 180.83mg/L, Al concentration 187.83mg/L, Sn concentration 198.04mg/L, 100mL of the prepared solution was put in a bottle, 40mL of N, N-Dimethylformamide (DMF) was added, the bottle was sealed, and after heating and heat preservation in a 50-degree oven for 7 hours, precipitates appeared at the bottom of the bottle, and after filtration, X-ray diffractometer (XRD) was performed for testing, which was in accordance with the powder diffraction pattern of gold simple substance. And (3) performing Inductively Coupled Plasma (ICP) test on the supernatant after the reaction, wherein the result shows that the gold precipitation rate is 98.3%.
Example 2A palladium ion-containing solution was prepared according to the ratio of Pd 99.23mg/L, Cu 203.52mg/L, Ni 180.83mg/L, Al concentration 187.83mg/L, Sn concentration 198.04mg/L, 100mL of the prepared solution was put in a bottle, 50mL of N, N-Dimethylacetamide (DMA) was added, the bottle was sealed, and after heating and holding in a 60-degree oven for 10 hours, a precipitate appeared at the bottom of the bottle, which was filtered and tested by an X-ray diffractometer (XRD) to conform to the powder diffraction pattern of the palladium simple substance. The supernatant after the reaction was subjected to an inductively coupled plasma spectrometer (ICP) test, and the result showed that the palladium precipitation rate was 95.4%.
Example 3 platinum ion-containing solution was prepared according to the ratio of Pt concentration 130.46mg/L, Cu, 203.52mg/L, Ni, 180.83mg/L, Al, 187.83mg/L, Sn, 198.04mg/L, 100mL of the prepared solution was put in a bottle, 40mL of ethanol was added, the bottle was sealed, and after heating and holding in a 60-degree oven for 8 hours, precipitates appeared at the bottom of the bottle, and after filtration, X-ray diffractometry (XRD) was performed to test the powder diffractogram according to the platinum simple substance. The supernatant after the reaction was subjected to an inductively coupled plasma spectrometer (ICP) test, and the result showed that the platinum precipitation rate was 87.8%.
Example 4 gold-containing palladium ion solution was prepared according to the ratio of Au concentration 260.16mg/L, Pd concentration 99.23mg/L, Cu concentration 203.52mg/L, Ni concentration 180.83mg/L, Al concentration 187.83mg/L, Sn concentration 198.04mg/L, 100mL of the prepared solution was put in a bottle, 40mL of N, N-Dimethylformamide (DMF) was added, the bottle was sealed, and after being placed in a 50-degree oven and heat-insulated for 7 hours, precipitate appeared at the bottom of the bottle, and after filtration, X-ray diffractometry (XRD) was performed to test, which was in accordance with the powder diffraction pattern of gold simple substance. The supernatant after the reaction was subjected to an inductively coupled plasma spectrometer (ICP) test, and the results showed that the gold precipitation rate was 96.7% and the palladium precipitation rate was 91.2%.
Claims (4)
1. The application of the reducing agent for the selective precipitation of the low-cost noble metal (gold, platinum and palladium) ions is characterized in that the noble metal (gold, platinum and palladium) ions in a solution containing the noble metal (gold, platinum and palladium) ions is selectively reduced and precipitated to obtain a noble metal (gold, platinum and palladium) simple substance, and the reducing agent is one or more of amide organic compounds (such as N, N-Dimethylformamide (DMF), N-Dimethylacetamide (DMA) and the like), ethanol and methanol.
2. The use of a reducing agent for the selective precipitation of low-cost noble metal ions (gold, platinum, palladium) according to claim 1, characterized in that it comprises the following steps:
(1) adding a reducing agent with the volume not exceeding that of the solution into the solution containing noble metal ions (gold, platinum and palladium);
(2) and sealing the container containing the liquid, putting the container into a baking oven at 50-70 ℃, and heating and preserving heat for 6-10 hours to obtain the noble metal (gold, platinum and palladium) simple substance.
3. Use of a reducing agent for the selective precipitation of low-cost noble metal ions (gold, platinum, palladium) according to claim 2, characterized in that the amount of reducing agent used does not exceed the amount of solution containing noble metal ions (gold, platinum, palladium).
4. The application of the reducing agent for selective precipitation of low-cost noble metal (gold, platinum and palladium) ions according to claim 1 is used for selective reduction precipitation of noble metal (gold, platinum and palladium) ions in a solution containing the noble metal (gold, platinum and palladium) ions and other metal ions to obtain a noble metal (gold, platinum and palladium) simple substance, wherein the other metal ions are one or more of copper ions, aluminum ions, nickel ions and tin ions.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111472217.9A CN114134336A (en) | 2021-12-03 | 2021-12-03 | Low-cost reducing agent for selective precipitation of noble metal ions |
| PCT/CN2022/080535 WO2023097923A1 (en) | 2021-12-03 | 2022-03-14 | Low-cost reducing agent for selective precipitation of noble metal ions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111472217.9A CN114134336A (en) | 2021-12-03 | 2021-12-03 | Low-cost reducing agent for selective precipitation of noble metal ions |
Publications (1)
| Publication Number | Publication Date |
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| CN114134336A true CN114134336A (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111472217.9A Pending CN114134336A (en) | 2021-12-03 | 2021-12-03 | Low-cost reducing agent for selective precipitation of noble metal ions |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114134336A (en) |
| WO (1) | WO2023097923A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023097923A1 (en) * | 2021-12-03 | 2023-06-08 | 北京工业大学 | Low-cost reducing agent for selective precipitation of noble metal ions |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105385854A (en) * | 2015-12-11 | 2016-03-09 | 励福(江门)环保科技股份有限公司 | Method for recycling precious metal including gold, platinum and palladium in jewelry processing polishing powder |
| CN109719304A (en) * | 2017-10-27 | 2019-05-07 | 中国科学院大连化学物理研究所 | The method and application of noble metal orphan's atom are prepared in a kind of solution |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10121156A (en) * | 1996-08-26 | 1998-05-12 | Kawasaki Kasei Chem Ltd | Metallic ion treating agent and treatment of noble metallic complex ion |
| JP2013227608A (en) * | 2012-04-25 | 2013-11-07 | Ibaraki Univ | Method for selectively recovering noble metal |
| CN103397186B (en) * | 2013-07-12 | 2014-12-17 | 湖南省同力电子废弃物回收拆解利用有限公司 | Regenerating method and process for recycling rare precious metals from electronic wastes |
| CN103421956A (en) * | 2013-07-26 | 2013-12-04 | 西北师范大学 | Technology for recycling platinum and palladium from acid solution containing low concentration of platinum family precious metals by adopting reducing precipitation method |
| CN104263936B (en) * | 2014-08-18 | 2017-01-25 | 中国科学院长春应用化学研究所 | Method for separating and recovering precious metals |
| CN105779766A (en) * | 2016-03-23 | 2016-07-20 | 江西铜业集团公司 | Method for gathering platinum and palladium in solution |
| CN113549762B (en) * | 2021-06-18 | 2023-04-25 | 苏州市富荣环保科技有限公司 | Separation and extraction process of rare noble metals in electronic waste |
| CN114134336A (en) * | 2021-12-03 | 2022-03-04 | 北京工业大学 | Low-cost reducing agent for selective precipitation of noble metal ions |
-
2021
- 2021-12-03 CN CN202111472217.9A patent/CN114134336A/en active Pending
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2022
- 2022-03-14 WO PCT/CN2022/080535 patent/WO2023097923A1/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105385854A (en) * | 2015-12-11 | 2016-03-09 | 励福(江门)环保科技股份有限公司 | Method for recycling precious metal including gold, platinum and palladium in jewelry processing polishing powder |
| CN109719304A (en) * | 2017-10-27 | 2019-05-07 | 中国科学院大连化学物理研究所 | The method and application of noble metal orphan's atom are prepared in a kind of solution |
Non-Patent Citations (1)
| Title |
|---|
| 曹艳丽等: "形貌可控贵金属纳米颗粒的合成、光学性质及生长机制", 《物理化学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023097923A1 (en) * | 2021-12-03 | 2023-06-08 | 北京工业大学 | Low-cost reducing agent for selective precipitation of noble metal ions |
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| WO2023097923A1 (en) | 2023-06-08 |
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