CN102766767B - Ion exchange recovery method for precious metal platinum in end-of-life vehicle exhaust catalyst - Google Patents
Ion exchange recovery method for precious metal platinum in end-of-life vehicle exhaust catalyst Download PDFInfo
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 229910052697 platinum Inorganic materials 0.000 title claims abstract description 40
- 239000003054 catalyst Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000011084 recovery Methods 0.000 title claims abstract description 25
- 238000005342 ion exchange Methods 0.000 title claims abstract description 23
- 239000010970 precious metal Substances 0.000 title abstract description 6
- 206010011906 Death Diseases 0.000 title 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000706 filtrate Substances 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 11
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 11
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 4
- 229910000510 noble metal Inorganic materials 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- 239000006185 dispersion Substances 0.000 claims description 10
- 229960001866 silicon dioxide Drugs 0.000 claims description 10
- 238000002425 crystallisation Methods 0.000 claims description 8
- 230000008025 crystallization Effects 0.000 claims description 8
- NICDRCVJGXLKSF-UHFFFAOYSA-N nitric acid;trihydrochloride Chemical compound Cl.Cl.Cl.O[N+]([O-])=O NICDRCVJGXLKSF-UHFFFAOYSA-N 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 7
- 230000001172 regenerating effect Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 2
- 239000001117 sulphuric acid Substances 0.000 claims description 2
- 235000011149 sulphuric acid Nutrition 0.000 claims description 2
- 239000002253 acid Substances 0.000 abstract description 7
- 238000001914 filtration Methods 0.000 abstract description 7
- 150000002500 ions Chemical class 0.000 abstract description 7
- 238000001704 evaporation Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002386 leaching Methods 0.000 abstract 2
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 12
- 239000007789 gas Substances 0.000 description 10
- 229910052763 palladium Inorganic materials 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- -1 platinum group metals Chemical class 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000010948 rhodium Substances 0.000 description 3
- 229910052703 rhodium Inorganic materials 0.000 description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 230000000536 complexating effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QYSYEILYXGRUOM-UHFFFAOYSA-N [Cl].[Pt] Chemical compound [Cl].[Pt] QYSYEILYXGRUOM-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
-
- 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 an ion exchange recovery method for precious metal platinum in a spent automobile exhaust catalyst. The method comprises the following steps of: 1) crushing a spent catalyst, dissolving the crushed spent catalyst into aqua regia, and filtering to remove solid matter to obtain a leaching liquor; 2) dissolving silicon dioxide into methylbenzene; 3) adding a silane coupling agent into the system in the previous step; 4) fully mixing and dispersing the system in the previous step, dispersing, filtering to obtain filter residue, and drying to obtain an ion exchanger; 5) fully mixing and dispersing the leaching liquor, the ion exchanger and water, and filtering to obtain filter residue; 6) washing and drying the filter residue obtained in the previous step to obtain a platinum-containing ion exchanger; 7) fully mixing and dispersing the platinum-containing ion exchanger and concentrated sulfuric acid, and filtering to obtain insolubles and a filtrate containing chloroplatinic acid; 8) adding the insolubles into water, heating, and filtering to obtain a filtrate, namely dilute sulfuric acid and filter residue, namely a regenerated ion exchanger which can be recycled; and 9) evaporating the filtrate containing the chloroplatinic acid obtained in step 7), concentrating and crystallizing. The recovery method is easy to operate and has a good impurity removal effect, and materials can be circularly recovered.
Description
Technical field
The present invention relates to the ion-exchange recovery method of noble metal platinum in a kind of abandoned car tail-gas catalyst.
Background technology
Metal platinum has detergent power to vehicle exhaust, surpasses every year 60% platinum, palladium all for the production of cleaning catalyst for tail gases of automobiles.But platinum catalyst in use, due to different reasons, cause catalytic activity to reduce gradually, finally because not meeting process requirements, scrap, generally only have 3 ~ 5 years work-ing life, along with automobile starts to enter the date of retirement in a large number, the auto-exhaust catalyst that has large quantities of platinum group metals needs to process.As everyone knows, the price of platinum is very expensive, and China is a weary country of the relative plaque of platinum resource.In recent years, with the increase of automobile quantity and the raising of environmental protection standard, the domestic demand to platinum increases year by year, wherein more than 90% needs import, a large amount of platinum-containing waste catalysts of the annual generation of China simultaneously.Therefore, in conjunction with China's national situation, carry out the research of reclaiming noble metal platinum in the recovery of platinum from abandoned car tail-gas catalyst and purification techniques agent, improve the rate of recovery of platinum, there is very large economic worth.
Beautiful, day, Ou Deng developed country is since the just recovery research work of noble metal platinum etc. in spent catalyst the 1950's, formed in decades the industry of a recycling.China's waste catalyst recovery work is started late, and along with country is to the raising up of the attention of environmental protection and crude oil and other metals resources prices, has also actively developed the recycling of spent catalyst in recent years.
The method that reclaims at present platinum metals from abandoned car tail-gas catalyst comprises following several:
" ion-exchange recovery method of gold, platinum and porpezite in acid waste water " (200810068303.1) of Shenzhen Zhonghenglong Industrial Co., Ltd., adopt a kind of weakly alkaline absorption resin D301-III, process containing precious metal waste water and waste liquid, utilize the peculiar selectivity of this resin, Separation and Recovery precious metal.
The people's such as Zhang Fangyu " reclaiming the method for platinum, palladium, rhodium from vehicle exhaust spent catalyst " (02113059.0), provides a kind of employing Strong acid ion-exchanger precious metal.Step gained precious metal is dissolved to liquid and with anionite-exchange resin, through ion-exchange, platinum, metallic palladium are adsorbed onto on resin, rhodium enters exchange tail washings; With perchloric acid or sodium hydroxide solution drip washing resin, platinum, the synchronous desorb of palladium; In leacheate, add solid ammonium chloride, make platinum be ammonium chloroplatinate precipitation, palladium still stays in solution; To add ammoniacal liquor complexing acidifying, hydrazine hydrate reduction to obtain palladium sponge containing palladium solution; In exchange tail washings, add copper powder displacement rhodium.
But the existing separating and purifying method rate of recovery is not high, separating effect is not good, therefore, at present various countries' researcher all, easy handling simple in a kind of technique of research and development, the rate of recovery is high, purity is high, the method for Separation of Pt and base metal selectively.
Summary of the invention
The ion-exchange recovery method that the object of this invention is to provide noble metal platinum in a kind of abandoned car tail-gas catalyst.
The technical solution used in the present invention is:
An ion-exchange recovery method for noble metal platinum in abandoned car tail-gas catalyst, comprises the following steps:
1) will discard catalyst breakage and be dissolved in chloroazotic acid, removing by filter solid substance, obtaining leach liquor;
2) silicon-dioxide is added in toluene and fully and disperse, the amount ratio of silicon-dioxide and toluene is 1g:(10-25mL);
3) silane coupling agent is added in the system of upper step; Wherein, the mass ratio of silane coupling agent and silicon-dioxide is (0.3-0.5): 1;
4) by the abundant blending dispersion of the system of upper step, filter and obtain filter residue, by filter residue and drying, obtain ion-exchanger;
5) getting step 1) gained leach liquor, the ion-exchanger of step 4) gained, water, is 25mL:(1-2.5 by three by amount ratio) g:(75-80) mL carries out abundant blending dispersion, and filter and obtain filter residue;
6) residue washing upper step being obtained, dry, obtains the ion-exchanger of platiniferous;
7) will be fully on the platinum-containing ion exchange step with concentrated sulfuric acid mixed dispersion agent, insoluble matter was filtered to obtain a filtrate and chlorine platinum acid; dosage 5) in this step, the use of concentrated sulfuric acid and the step of ion exchangers drawn ratio (10-25mL): 1g;
8) insolubles is added to the water, heating, filters, and obtaining filtrate is dilute sulphuric acid, and filter residue is regenerating ion-exchanger, reuse capable of circulation; In the consumption of water and upper step, the amount ratio of the vitriol oil is 1-2:1;
9) while step 7) gained being concentrated into the 10-20% of this former filtrate volume containing the filtrate of Platinic chloride, stop heating, be cooled to room temperature, add the hydrochloric acid of 36-38wt%, continue to be concentrated into crystallization, stop heating, be cooled to room temperature, crystallization, obtains Platinic chloride; The mass ratio of the ion-exchanger of wherein, taking in the volume of hydrochloric acid used and step 5) is (10-15mL): 1g.
In step 1), doubly, described theoretical consumption refers to the solubilized part in discarded catalyzer is dissolved just completely the 2-3 that the consumption of chloroazotic acid is theoretical consumption.
In step 3), silane coupling agent is KH-540, KH
-792, a kind of in NQ-62.
In step 4), fully blending dispersion is at room temperature to stir 5-8h.
In step 4), drying temperature is 50-70 ℃, and be 5-8h time of drying.
In step 5), fully blending dispersion is to stir 5-8h at 60-70 ℃.
In step 6), drying temperature is 50-70 ℃, and be 5-8h time of drying.
In step 7), the concentration of the vitriol oil is 80-98wt%.
In step 8), the temperature of heating is 90-100 ℃, and the time of heating is 2-4h.
The invention has the beneficial effects as follows: (1) the invention provides a kind of ion exchange method and reclaims platinum, compares with conventional ion exchange process, and ion-exchanger ratio is easier to synthesize, after exchange, desorption platinum ion simple to operate.
(2) ion-exchanger that prepared by the present invention is different to the binding ability of the complexing ion of different valence state, and selectivity is higher, and impurity-eliminating effect is better.
(3) ion-exchanger used and sulfuric acid can recycle, very environmental protection.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further:
embodiment 1:
An ion-exchange recovery method for noble metal platinum in abandoned car tail-gas catalyst, comprises the following steps:
(1) will discard catalyst breakage to 3mm;
(2) under room temperature, the catalyzer after fragmentation is inserted and in chloroazotic acid, stir 2h it is dissolved, filter, obtain leach liquor; The consumption of chloroazotic acid is 2 times of theoretical consumption, and described theoretical consumption refers to the solubilized part in discarded catalyzer is dissolved just completely;
(3) 1g silicon-dioxide is added in 25mL toluene and abundant dispersed with stirring;
(4) 0.3g 3-TSL 8330 is added in the toluene suspension of the silicon-dioxide that upper step obtains;
(5) by the mixture of upper step gained, at room temperature stir 5h, filter and collect filter residue, by filter residue dry 5h at 50 ℃, obtain ion-exchanger;
(6) from step 2) take out 25mL the leach liquor that obtains, get the upper step of 1g ion-exchanger, get 75mL deionized water, three is mixed, at 60 ℃, stir 5h, filter and obtain filter residue;
(7) filter residue of upper step is washed 3 times with deionized water, ethanol, ether successively, at 50 ℃, be dried 5h, obtain the ion-exchanger of platiniferous;
(8) the platinum containing ion exchange agent, get into the 25mL concentration of sulfuric acid in 98wt% 5h, stirring, filtering to obtain filtrate is insoluble, chloroplatinic acid solution;
(9) insolubles of upper step is added in 25mL water, at 90 ℃, heat 2h, filter, filter residue is regenerating ion-exchanger, can reuse;
(10) upper step is filtered to the filtrate evaporative crystallization at 100 ℃ obtaining, when evaporating the 10-20vol% of the most former filtrate volume of filtrate volume, stop heating, be cooled to room temperature, adding 10mL concentration is the hydrochloric acid of 36-38wt%, continuation is evaporation concentration at 100 ℃, when there being crystal to separate out, stop heating, be cooled to room temperature, crystallization, obtains Platinic chloride.
embodiment 2:
An ion-exchange recovery method for noble metal platinum in abandoned car tail-gas catalyst, comprises the following steps:
(1) exhaust gas catalyst is crushed to below 5mm;
(2) under room temperature, the catalyzer after fragmentation is inserted and in chloroazotic acid, stir 2h it is dissolved, filter, obtain leach liquor; The consumption of chloroazotic acid is 3 times of theoretical consumption, and described theoretical consumption refers to the solubilized part in discarded catalyzer is dissolved just completely;
(3) 1g silicon-dioxide is added in 25mL toluene and abundant dispersed with stirring;
(4) 1.5g N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane is added in the toluene suspension of silicon-dioxide of upper step;
(5) mixture upper step being obtained, at room temperature stirs 5h, filters and collects filter residue, by filter residue dry 5h at 50 ℃, obtains ion-exchanger;
(6) from step 2) take out 50mL the leach liquor that obtains, get the upper step of 5g ion-exchanger, get 150mL deionized water, three is mixed mutually, at 70 ℃, stir 5h, filter and obtain filter residue;
(7) filter residue of upper step is washed 3 times with deionized water, ethanol, ether successively, at 50 ℃, be dried 5h, obtain the ion-exchanger of platiniferous;
(8) the platinum containing ion exchange agent, get into the 50mL concentration of sulfuric acid in 98wt% 5h, stirring, filtering to obtain filtrate is insoluble, chloroplatinic acid solution;
(9) insolubles of upper step is added in 50mL water, at 90 ℃, heat 2h, filter, filter residue is regenerating ion-exchanger, can reuse;
(10) upper step is filtered to the filtrate evaporative crystallization at 100 ℃ obtaining, when evaporating the 10-20vol% of the most former filtrate volume of filtrate volume, stop heating, be cooled to room temperature, add the hydrochloric acid that 75mL concentration is 36-38wt%, continuation is evaporation concentration at 100 ℃, when there being crystal to separate out, stop heating, be cooled to room temperature, crystallization, obtains Platinic chloride.
Claims (8)
1. an ion-exchange recovery method for noble metal platinum in abandoned car tail-gas catalyst, is characterized in that: comprise the following steps:
1) will discard catalyst breakage and be dissolved in chloroazotic acid, removing by filter solid substance, obtaining leach liquor;
2) silicon-dioxide is added in toluene and fully and disperse, the amount ratio of silicon-dioxide and toluene is 1g:(10-25mL);
3) silane coupling agent is added in the system of upper step; Wherein, the mass ratio of silane coupling agent and silicon-dioxide is (0.3-0.5): 1;
4) by the abundant blending dispersion of the system of upper step, filter and obtain filter residue, by filter residue and drying, obtain ion-exchanger;
5) getting step 1) gained leach liquor, the ion-exchanger of step 4) gained, water, is 25mL:(1-2.5 by three by amount ratio) g:(75-80) mL carries out abundant blending dispersion, and filter and obtain filter residue;
6) residue washing upper step being obtained, dry, obtains the ion-exchanger of platiniferous;
7), by the ion-exchanger of upper step platiniferous and the abundant blending dispersion of the vitriol oil, filter and obtain insolubles and the filtrate that contains Platinic chloride; The amount ratio of the ion-exchanger of taking in the vitriol oil used and step 5) in this step is (10-25mL): 1g;
8) insolubles is added to the water, heating, filters, and obtaining filtrate is dilute sulphuric acid, and filter residue is regenerating ion-exchanger, reuse capable of circulation; In the consumption of water and upper step, the amount ratio of the vitriol oil is 1-2:1;
9) while step 7) gained being concentrated into the 10-20% of this former filtrate volume containing the filtrate of Platinic chloride, stop heating, be cooled to room temperature, add the hydrochloric acid of 36-38wt%, continue to be concentrated into crystallization, stop heating, be cooled to room temperature, crystallization, obtains Platinic chloride; The mass ratio of the ion-exchanger of wherein, taking in the volume of hydrochloric acid used and step 5) is (10-15mL): 1g; In step 3), silane coupling agent is KH-540, KH
-792, a kind of in NQ-62.
2. the ion-exchange recovery method of noble metal platinum in a kind of abandoned car tail-gas catalyst according to claim 1, it is characterized in that: in step 1), the consumption of chloroazotic acid is 2-3 times of theoretical consumption, and described theoretical consumption refers to the solubilized part in discarded catalyzer is dissolved just completely.
3. the ion-exchange recovery method of noble metal platinum in a kind of abandoned car tail-gas catalyst according to claim 1, is characterized in that: in step 4), fully blending dispersion is at room temperature to stir 5-8h.
4. the ion-exchange recovery method of noble metal platinum in a kind of abandoned car tail-gas catalyst according to claim 1, is characterized in that: in step 4), drying temperature is 50-70 ℃, and be 5-8h time of drying.
5. the ion-exchange recovery method of noble metal platinum in a kind of abandoned car tail-gas catalyst according to claim 1, is characterized in that: in step 5), fully blending dispersion is to stir 5-8h at 60-70 ℃.
6. the ion-exchange recovery method of noble metal platinum in a kind of abandoned car tail-gas catalyst according to claim 1, is characterized in that: in step 6), drying temperature is 50-70 ℃, and be 5-8h time of drying.
7. the ion-exchange recovery method of noble metal platinum in a kind of abandoned car tail-gas catalyst according to claim 1, is characterized in that: in step 7), the concentration of the vitriol oil is 80-98wt%.
8. the ion-exchange recovery method of noble metal platinum in a kind of abandoned car tail-gas catalyst according to claim 1, is characterized in that: in step 8), the temperature of heating is 90-100 ℃, and the time of heating is 2-4h.
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| CN110724828A (en) * | 2019-10-23 | 2020-01-24 | 金川集团股份有限公司 | Method for dissolving precious metal in waste catalyst |
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| CN1038199C (en) * | 1994-11-30 | 1998-04-29 | 核工业北京化工冶金研究院 | Recovery of platinum family elements from waste catalysts |
| JP3366485B2 (en) * | 1995-03-28 | 2003-01-14 | 東京電力株式会社 | Method for separation and recovery of platinum group elements and technetium |
| CN1385545A (en) * | 2002-05-24 | 2002-12-18 | 张方宇 | Method for recovering platinum, palladium and rhodium from waste catalyst in car tail gas |
| FR2843392B1 (en) * | 2002-08-09 | 2004-09-10 | Rhodia Chimie Sa | PROCESS FOR THE PREPARATION OF HALOGENOALKYLDIALKYLCHLOROSILANE |
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| CN110724828A (en) * | 2019-10-23 | 2020-01-24 | 金川集团股份有限公司 | Method for dissolving precious metal in waste catalyst |
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