CN116536521A - Method for efficiently recycling metallic iridium from waste iridium catalyst - Google Patents
Method for efficiently recycling metallic iridium from waste iridium catalyst Download PDFInfo
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- CN116536521A CN116536521A CN202310368329.2A CN202310368329A CN116536521A CN 116536521 A CN116536521 A CN 116536521A CN 202310368329 A CN202310368329 A CN 202310368329A CN 116536521 A CN116536521 A CN 116536521A
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- iridium
- waste
- ammonium chloride
- precipitate
- catalyst
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- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 229910052741 iridium Inorganic materials 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 61
- 239000003054 catalyst Substances 0.000 title claims abstract description 25
- 239000002699 waste material Substances 0.000 title claims abstract description 16
- 238000004064 recycling Methods 0.000 title abstract description 6
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- 235000019270 ammonium chloride Nutrition 0.000 claims abstract description 17
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002244 precipitate Substances 0.000 claims abstract description 15
- 238000001354 calcination Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- 238000001704 evaporation Methods 0.000 claims description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 8
- 230000008020 evaporation Effects 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 229910052573 porcelain Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- -1 Ammonium chloroiridium Chemical compound 0.000 claims description 4
- 238000003916 acid precipitation Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 14
- 229910052751 metal Inorganic materials 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000001590 oxidative effect Effects 0.000 abstract description 6
- 239000007800 oxidant agent Substances 0.000 abstract description 3
- IZJHFJOSJRYLBF-UHFFFAOYSA-N azanium;iridium;chloride Chemical compound [NH4+].[Cl-].[Ir] IZJHFJOSJRYLBF-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005554 pickling Methods 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 description 9
- 238000004821 distillation Methods 0.000 description 7
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 239000000460 chlorine Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 229910000510 noble metal Inorganic materials 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 238000009388 chemical precipitation Methods 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001698 pyrogenic effect Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011027 product recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012546 transfer Methods 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
- 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
- C22B11/00—Obtaining noble metals
- C22B11/02—Obtaining noble metals by dry processes
- C22B11/021—Recovery of noble metals from waste materials
- C22B11/026—Recovery of noble metals from waste materials from spent catalysts
-
- 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
Abstract
The invention discloses a method for efficiently recycling metallic iridium from a waste iridium catalyst, which can obtain the metallic iridium with high purity through simple three-step reaction; firstly, hydrochloric acid is added into a waste iridium catalyst for pickling to completely dissolve iridium, then ammonium chloride is added into the solution to obtain ammonium chloride iridium precipitate, and then the metal iridium is obtained after calcination and reduction; compared with the traditional method for recovering metallic iridium from the iridium-containing spent catalyst treated by the strong oxidant, the method provided by the invention has the advantages of short process period, low production cost, high recovery efficiency and the like.
Description
Technical Field
The invention relates to the technical field of iridium recovery in waste iridium catalysts, in particular to a method for efficiently recovering metallic iridium from waste iridium catalysts.
Background
The platinum group element has the characteristics of excellent catalytic activity, high melting point, high boiling point, low vapor pressure, oxidation resistance and corrosion resistance, and is widely applied to industries such as automobiles, petrifaction, medicines, palladium-gold, glass, aerospace, military and the like, and becomes an important component of modern industry. However, with the development of industries such as petroleum, chemical industry, environmental protection and the like, the dosage of noble metal catalysts is increased year by year, the catalysts lose activity due to problems of poisoning, easy construction of carriers, carbon accumulation and the like in the use process, the catalysts need to be replaced regularly, the noble metal content in the replaced catalysts is far higher than that in noble metal ores, and therefore, the secondary recycling of the rare noble metal-containing spent catalysts has great significance, resources can be fully utilized, and the damage to the ecological environment caused by heavy metal inflow into the natural environment can be effectively prevented.
At present, the separation and recovery method of the secondary resource of the metal iridium is mainly divided into a pyrogenic process and a wet process. The solid-phase metallic iridium is mainly smelted by adopting a pyrogenic process, and mainly comprises the following steps: induction melting, calcining, burning, microwave, reduction, and the like; the liquid-phase iridium is separated mainly by wet method, and usually by ion exchange method, chemical precipitation method, electrodialysis method, oxidative distillation method, extraction method and adsorption method.
1. Induction melting method: the induction melting method is a special melting technology for melting metals and alloys under vacuum. Several metals and alloys can be fused with iridium, and then pure iridium powder can be obtained through acid leaching or alkali leaching. The induction melting method for treating and recycling iridium has the advantages of simple subsequent processing technology, reduced hydration refining cost, and finer and purer produced products; the method has the defects of high reaction temperature, high temperature and absolute loss caused by iridium volatilization, and simultaneously causes environmental pollution.
2. Oxidative distillation: the oxidation distillation method mainly comprises the steps of adding a solution or slag containing metallic iridium into a distillation reaction vessel, adding a strong oxidant for distillation after the pH value is regulated by acid, and oxidizing and evaporating part of components in the solution to realize separation. The method has the advantages that the product recovery rate and purity are high through multiple times of distillation and filtration; the method has the defects of complicated steps, long time consumption, large reagent consumption, high energy consumption and the like due to repeated distillation and filtration, and the method needs to be cooperated with a separation method, so that the recovery of the metal iridium can not be independently completed.
3. Chemical precipitation: the chemical precipitation method is a method for separating and enriching solution components by utilizing an ion hydrolysis method or a insoluble salt precipitation method. The method has the advantages of simple operation, rapid reaction and short process period; but has the defects that the requirement on the concentration of metal ions in the feed liquid is high, the metal ions cannot be excessively high or excessively low,
4. extraction method: the extraction method uses the solubility difference of substances in two mutually insoluble solvent systems, and uses the combination of metallic iridium and an extracting agent to generate chelate which is easily dissolved in an organic solvent, so as to transfer iridium from a water phase to an organic phase, thereby achieving the purpose of separation or enrichment. The extraction method has the advantages that the high extraction rate can be obtained under the condition of few extraction stages, and the extraction method has simple equipment, convenient operation, selectivity and easy realization of automation. However, the extraction method has the defects that the concentration of feed liquid cannot be too high, and the back extraction rate of iridium can only reach 90 percent.
Based on the method, the invention provides a novel method for efficiently recovering the metallic iridium from the iridium-containing spent catalyst, and compared with the traditional iridium recovery technology, the method has the advantages of short process period, low production cost, high recovery efficiency and the like.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a method for efficiently recycling metallic iridium from waste iridium catalyst.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows: a method for efficiently recovering metallic iridium from waste iridium catalyst comprises the following steps
(1) And (3) chloridizing to prepare liquid: adding industrial hydrochloric acid and a proper amount of water into a reaction kettle filled with a waste catalyst containing metallic iridium, heating the feed liquid in the reaction kettle, introducing chlorine gas, stirring, fully reacting, and dissolving and completely reacting the materials;
(2) Ammonium chloroiridium acid precipitation: adding solid ammonium chloride into the solution, stirring until no precipitate is generated after adding ammonium chloride, standing, filtering, separating, and washing the precipitate with ammonium chloride solution;
(3) And (3) calcining and reducing: and (3) placing the ammonium chloroiridate precipitate in a porcelain evaporation dish, then placing the porcelain evaporation dish in a box-type resistance furnace, and slowly heating to 200 ℃ and preserving heat.
Preferably, the heating temperature in the step (1) is 50-70 ℃ and the reaction time is 2h.
Preferably, in the step (3), the ammonium chloroiridate is decomposed at 200 ℃ to generate metallic iridium, hydrogen chloride, ammonium chloride and nitrogen.
The invention has the beneficial effects that:
1. the invention adopts the whole treatment method, the treatment steps are simple, only three steps of reactions are needed to be completed, and the method has the advantages of shortening the process period, reducing the production cost, simplifying the process method and improving the recovery efficiency through a reasonable design scheme.
2. The recovery method is simple and easy to implement, does not need high-temperature high-pressure extreme reaction conditions, can perform reaction under milder conditions, and has the recovery rate of the treated metallic iridium reaching more than 97 percent, low production cost and high purity.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention.
Fig. 1 is a process flow diagram of the present invention.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
Referring to fig. 1, a method for efficiently recovering metallic iridium from a spent iridium catalyst according to a preferred embodiment of the present invention includes the steps of:
(1) And (3) chloridizing to prepare liquid: adding industrial hydrochloric acid and a proper amount of water into a reaction kettle filled with a waste catalyst containing metallic iridium, heating the feed liquid in the reaction kettle, introducing chlorine gas, stirring, fully reacting, and dissolving and completely reacting the materials;
(2) Ammonium chloroiridium acid precipitation: adding solid ammonium chloride into the solution, stirring until no precipitate is generated after adding ammonium chloride, standing, filtering, separating, and washing the precipitate with ammonium chloride solution;
(3) And (3) calcining and reducing: and (3) placing the ammonium chloroiridate precipitate in a porcelain evaporation dish, then placing the porcelain evaporation dish in a box-type resistance furnace, and slowly heating to 200 ℃ and preserving heat.
The method can obtain the high-purity iridium metal through a simple three-step reaction; firstly, hydrochloric acid is added into a waste iridium catalyst for pickling to completely dissolve iridium, then ammonium chloride is added into the solution to obtain ammonium chloride iridium precipitate, and then the metal iridium is obtained after calcination and reduction; compared with the traditional method for recovering metallic iridium from the iridium-containing spent catalyst treated by the strong oxidant, the method provided by the invention has the advantages of short process period, low production cost, high recovery efficiency and the like.
As a preferred embodiment of the invention, it may also have the following additional technical features:
in this example, the heating temperature in step (1) is 50-70℃and the reaction time is 2 hours.
In this example, the ammonium chloroiridate in step (3) is decomposed at 200 ℃ to form metallic iridium, hydrogen chloride, ammonium chloride and nitrogen.
Embodiment case 1:
a method for efficiently recovering metallic iridium from waste iridium catalyst comprises the following steps:
(1) And (3) chloridizing to prepare liquid: according to the report of the total element analysis, the content of the metallic iridium is 0.614 percent and the total content of the aluminum oxide and the silicon oxide is 94.28 percent in the dry state of 20t of the material.
100.00kg of materials (0.614 kg containing iridium) are put into a 200L reaction kettle, 65kg of industrial hydrochloric acid (about 50L) and 65L of water are added into the reaction kettle, the feed liquid in the reaction kettle is heated to about 50-70 ℃, and chlorine is introduced into the reaction kettle for stirring, and the reaction is carried out for 1.5 hours, so that iridium complex is completely dissolved;
stopping introducing chlorine after the reaction is completed (the mass of the chlorine is increased by 0.453kg after the reaction), and continuously performing heat preservation reaction on the reaction kettle for about 0.5h, wherein tail gas generated in the reaction kettle enters a tail gas absorbing device; the leached residues are washed by 75 liters of water through a suction filtration tank, are combined and transferred into the next 300L reaction kettle, about 180kg of leached residues are packaged and put in storage, and the leaching solution is about 125.453kg.
The main chemical reaction equation:
Ir+2Cl 2 +2HCl→H 2 IrCl 6 。
(2) Ammonium chloroiridium acid precipitation: adding excessive solid ammonium chloride into the solution, stirring until no precipitate is generated after adding ammonium chloride, standing, filtering, separating, and collecting precipitate; the precipitate was repeatedly washed with an ammonium chloride solution to remove excess impurities, yielding 1.379kg of ammonium chloroiridate precipitate.
The main chemical reaction equation:
H 2 IrCl 6 +2NH 4 Cl→(NH 4 ) 2 IrCl 6 ↓+2HCl。
(3) And (3) calcining and reducing: placing the ammonium chloroiridate obtained in the step (2) in a ceramic evaporation pan, then placing the ceramic evaporation pan in a box-type resistance furnace for calcination, heating to 200 ℃, and then preserving heat until the reaction is complete to obtain 0.601kg of metallic iridium; the total recovery rate of the iridium metal reaches 97.88 percent.
The main chemical reaction equation:
3(NH 4 ) 2 IrCl 6 →3Ir↓+16HCl+2NH 4 Cl+2N 2 ↑。
the invention adopts the whole treatment method, the treatment steps are simple, only three steps of reactions are needed to be completed, and the method has the advantages of shortening the process period, reducing the production cost, simplifying the process method and improving the recovery efficiency through a reasonable design scheme; the recovery method is simple and easy to implement, does not need high-temperature high-pressure extreme reaction conditions, can perform reaction under milder conditions, and has the recovery rate of the treated metallic iridium reaching more than 97 percent, low production cost and high purity.
The above additional technical features can be freely combined and superimposed by a person skilled in the art without conflict.
The foregoing is only a preferred embodiment of the present invention, and all technical solutions for achieving the object of the present invention by substantially the same means are within the scope of the present invention.
Claims (3)
1. A method for efficiently recovering metallic iridium from waste iridium catalyst is characterized in that: the method comprises the following steps:
(1) And (3) chloridizing to prepare liquid: adding industrial hydrochloric acid and a proper amount of water into a reaction kettle filled with a waste catalyst containing metallic iridium, heating the feed liquid in the reaction kettle, introducing chlorine gas, stirring, fully reacting, and dissolving and completely reacting the materials;
(2) Ammonium chloroiridium acid precipitation: adding solid ammonium chloride into the solution, stirring until no precipitate is generated after adding ammonium chloride, standing, filtering, separating, and washing the precipitate with ammonium chloride solution;
(3) And (3) calcining and reducing: and (3) placing the ammonium chloroiridate precipitate in a porcelain evaporation dish, then placing the porcelain evaporation dish in a box-type resistance furnace, and slowly heating to 200 ℃ and preserving heat.
2. The method for efficiently recovering metallic iridium from waste iridium catalyst according to claim 1, wherein: the heating temperature in the step (1) is 50-70 ℃ and the reaction time is 2h.
3. The method for efficiently recovering metallic iridium from waste iridium catalyst according to claim 1, wherein: and (3) decomposing the ammonium chloroiridate in the step (3) at 200 ℃ to generate metallic iridium, hydrogen chloride, ammonium chloride and nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310368329.2A CN116536521A (en) | 2023-04-09 | 2023-04-09 | Method for efficiently recycling metallic iridium from waste iridium catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310368329.2A CN116536521A (en) | 2023-04-09 | 2023-04-09 | Method for efficiently recycling metallic iridium from waste iridium catalyst |
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| CN116536521A true CN116536521A (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310368329.2A Pending CN116536521A (en) | 2023-04-09 | 2023-04-09 | Method for efficiently recycling metallic iridium from waste iridium catalyst |
Country Status (1)
| Country | Link |
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| CN (1) | CN116536521A (en) |
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2023
- 2023-04-09 CN CN202310368329.2A patent/CN116536521A/en active Pending
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