CN102766767A - Ion exchange recovery method for precious metal platinum in spent automobile exhaust catalyst - Google Patents
Ion exchange recovery method for precious metal platinum in spent automobile exhaust catalyst Download PDFInfo
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 229910052697 platinum Inorganic materials 0.000 title claims abstract description 40
- 239000003054 catalyst Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000011084 recovery Methods 0.000 title claims abstract description 26
- 238000005342 ion exchange Methods 0.000 title claims abstract description 21
- 239000010970 precious metal Substances 0.000 title abstract description 6
- 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
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000001035 drying Methods 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 11
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 11
- 239000000706 filtrate Substances 0.000 claims abstract description 9
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 6
- 239000002253 acid Substances 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 4
- 229910000510 noble metal Inorganic materials 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- 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 6
- 239000006185 dispersion Substances 0.000 claims description 4
- 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
- 150000002500 ions Chemical class 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 abstract 5
- 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
- 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
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- -1 platinum group metals Chemical class 0.000 description 3
- 229910052703 rhodium Inorganic materials 0.000 description 3
- 239000010948 rhodium Substances 0.000 description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 3
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 2
- 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
- 238000005516 engineering process Methods 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
- 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
- 241001404789 Smilax glabra Species 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
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000008021 deposition Effects 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
- 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
- 150000002739 metals Chemical class 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 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
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- Catalysts (AREA)
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, and annual platinum, palladium above 60% all is used to produce cleaning catalyst for tail gases of automobiles.But platinum catalyst in use; Owing to different reasons; Cause catalytic activity to reduce gradually, finally scrap because of not satisfying process requirements, generally have only 3 ~ 5 years work-ing life; Along with automobile begins to get into the date of retirement in a large number, the auto-exhaust catalyst that has large quantities of platinum group metals needs to handle.As everyone knows, the price of platinum is very expensive, and China is the weary country of a relative plaque of platinum resource.In recent years, with the increase of automobile quantity and the raising of environmental protection standard, domestic demand to platinum increases year by year, wherein needs import more than 90%, a large amount of platiniferous spent catalyst of the annual generation of China simultaneously.Therefore,, carry out the research of reclaiming noble metal platinum in recovery and the purification techniques agent of platinum from the abandoned car tail-gas catalyst, improve the recovery of platinum, have very big economic worth in conjunction with China's national situation.
Developed countries such as U.S.A, day, Europe have formed the industry of a recycling in decades since the just recovery research work of noble metal platinum etc. in spent catalyst the 1950's.China's spent catalyst recovery operation is started late, in recent years along with country to the raising up of the attention of environmental protection and crude oil and other metals resources prices, also actively developed the recycling of spent catalyst.
The method that from the abandoned car tail-gas catalyst, reclaims the platinum metals at present comprises following several kinds:
" ion-exchange recovery method of gold, platinum and porpezite in the acid waste water " (200810068303.1) of Shenzhen Zhonghenglong Industrial Co., Ltd.; Adopt a kind of weakly alkaline absorption resin D301-III; Processing contains the precious metal waste water and waste liquid; Utilize the peculiar selectivity of this resin, the Separation and Recovery precious metal.
People's such as Zhang Fangyu " from the vehicle exhaust spent catalyst, reclaiming the method for platinum, palladium, rhodium " (02113059.0) provides a kind of employing ion exchange method separate precious metal.Through IX platinum, metallic palladium are adsorbed onto on the resin with anionite-exchange resin step gained precious metal dissolving liquid, rhodium gets into the 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 the ammonium chloroplatinate deposition, palladium still stays in the solution; To contain that palladium solution adds ammoniacal liquor complexing acidifying, hydrazine hydrate reduction gets palladium sponge; In the exchange tail washings, add copper powder displacement rhodium.
But the existing separating and purifying method recovery is not high, and separating effect is not good, therefore, at present researcher all simple, easy handling in various countries' in a kind of technology of research and development, the recovery is high, purity is high, the method for separating platinum and base metal selectively.
Summary of the invention
The ion-exchange recovery method that the purpose of this invention is to provide noble metal platinum in a kind of abandoned car tail-gas catalyst.
The technical scheme that the present invention taked is:
The ion-exchange recovery method of noble metal platinum in a kind of abandoned car tail-gas catalyst may further comprise the steps:
1) will discard catalyst breakage and be dissolved in chloroazotic acid, remove by filter solid substance, obtain leach liquor;
2) add silicon-dioxide in the toluene and fully dispersion, the amount ratio of silicon-dioxide and toluene is 1g: (10-25mL);
3) silane coupling agent is added in the system that goes up the step; Wherein, the mass ratio of silane coupling agent and silicon-dioxide is (0.3-0.5): 1;
4) the system thorough mixing that will go up the step disperses, and filters and obtains filter residue, with filter residue and drying, promptly gets ionite;
5) getting step 1) gained leach liquor, the ionite of step 4) gained, water, is 25mL with the three by amount ratio: (1-2.5) g: (75-80) mL carries out the thorough mixing dispersion, filters and obtains filter residue;
6) will go up residue washing, the drying that the step obtains, obtain the platiniferous ionite;
7) will go up ion-exchanger and the abundant mixed and dispersed of the concentrated sulfuric acid that goes on foot platiniferous, and filter and obtain insoluble matter and the filtrating that contains chloroplatinic acid; The amount ratio of the ion-exchanger of being taken in the used concentrated sulfuric acid and the step 5) in this step is (10-25mL): 1g;
8) insolubles is added in the entry, heating is filtered, and obtains filtrating and is dilute sulphuric acid, and filter residue is a regenerating ion-exchanger, reuse capable of circulation; The consumption of water and in the last step amount ratio of the vitriol oil be 1-2:1;
When the filtrating that 9) the step 7) gained is contained Platinic chloride is concentrated into the 10-20% of this former filtrate volume, stop heating, be cooled to room temperature, add the hydrochloric acid of 36-38wt%, continue to be concentrated into crystallization and separate out, stop heating, be cooled to room temperature, separate out crystallization, obtain Platinic chloride; The mass ratio of the ionite of wherein, being taken in the volume of used hydrochloric acid and the step 5) is (10-15mL): 1g.
In the step 1), the consumption of chloroazotic acid is 2-3 a times of theoretical consumption, and described theoretical consumption is meant the dissolving fully just of the solubilized part in the discarded catalyzer.
In the step 3), silane coupling agent is KH-540, KH
-792, a kind of among the NQ-62.
In the step 4), it is at room temperature to stir 5-8h that thorough mixing disperses.
In the step 4), drying temperature is 50-70 ℃, and be 5-8h time of drying.
In the step 5), it is to stir 5-8h down at 60-70 ℃ that thorough mixing disperses.
In the step 6), drying temperature is 50-70 ℃, and be 5-8h time of drying.
In the step 7), the concentration of the vitriol oil is 80-98wt%.
In the 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 present invention provides a kind of ion exchange method to reclaim platinum, compares with the conventional ion exchange process, and the ionite ratio is easier to synthesize, after the exchange, and desorption platinum ion simple to operate.
(2) ionite of the present invention's preparation 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) used ionite and sulfuric acid can reclaim usefulness again, very environmental protection.
Embodiment
Below in conjunction with specific embodiment the present invention is done further explanation:
Embodiment 1:
The ion-exchange recovery method of noble metal platinum in a kind of abandoned car tail-gas catalyst may further comprise the steps:
(1) will discard catalyst breakage to 3mm;
(2) under the room temperature catalyzer after the fragmentation inserted in the chloroazotic acid and stir 2h and make its dissolving, filter, obtain leach liquor; The consumption of chloroazotic acid is 2 times of theoretical consumption, and described theoretical consumption is meant the dissolving fully just of the solubilized part in the discarded catalyzer;
(3) add in the 25mL toluene 1g silicon-dioxide and abundant dispersed with stirring;
(4) 0.3g 3-TSL 8330 is added in the toluene suspension that upward goes on foot the silicon-dioxide that obtains;
(5) will go up the mixture that goes on foot gained, at room temperature stir 5h, and filter and collect filter residue,, promptly obtain ionite filter residue dry 5h under 50 ℃;
(6) from step 2) take out 25mL the leach liquor that obtains, get ionite that 1g goes up the step, get the 75mL deionized water, the three is mixed, stir 5h down at 60 ℃, filter and obtain filter residue;
(7) filter residue that will go up the step washs 3 times with deionized water, ethanol, ether successively, and dry 5h under 50 ℃ obtains the platiniferous ionite;
(8) will go up the ion-exchanger that goes on foot the platiniferous that obtains and put into the concentrated sulfuric acid that 25mL concentration is 98wt%, stir 5h, filter insoluble matter, and obtain filtrating and be platinum acid chloride solution;
(9) will go up the insolubles in step and add in the 25mL water, and at 90 ℃ of heating 2h down, filter, filter residue is a regenerating ion-exchanger, can reuse;
(10) will go up the step and filter the filtrating obtain, when the 10-20vol% of the most former filtrate volume of evaporated filtrate volume, stop heating at 100 ℃ of following evaporative crystallizations; Be cooled to room temperature, adding 10mL concentration is the hydrochloric acid of 36-38wt%, continues 100 ℃ of following evaporation concentration; Separate out as crystal, promptly stop heating, be cooled to room temperature; Separate out crystallization, promptly obtain Platinic chloride.
Embodiment 2:
The ion-exchange recovery method of noble metal platinum in a kind of abandoned car tail-gas catalyst may further comprise the steps:
(1) exhaust gas catalyst is crushed to below the 5mm;
(2) under the room temperature catalyzer after the fragmentation inserted in the chloroazotic acid and stir 2h and make its dissolving, filter, obtain leach liquor; The consumption of chloroazotic acid is 3 times of theoretical consumption, and described theoretical consumption is meant the dissolving fully just of the solubilized part in the discarded catalyzer;
(3) add in the 25mL toluene 1g silicon-dioxide and abundant dispersed with stirring;
(4) 1.5g N-(β-aminoethyl)-γ-An Bingjisanjiayangjiguiwan is added in the toluene suspension of the silicon-dioxide of going up the step;
(5) will go up the mixture that the step obtains, at room temperature stir 5h, and filter and collect filter residue,, promptly obtain ionite filter residue dry 5h under 50 ℃;
(6) from step 2) take out 50mL the leach liquor that obtains, get ionite that 5g goes up the step, get the 150mL deionized water, the three is mixed mutually, stir 5h down at 70 ℃, filter and obtain filter residue;
(7) filter residue that will go up the step washs 3 times with deionized water, ethanol, ether successively, and dry 5h under 50 ℃ obtains the platiniferous ionite;
(8) will go up the ion-exchanger that goes on foot the platiniferous that obtains and put into the concentrated sulfuric acid that 50mL concentration is 98wt%, stir 5h, filter insoluble matter, and obtain filtrating and be platinum acid chloride solution;
(9) will go up the insolubles in step and add in the 50mL water, and at 90 ℃ of heating 2h down, filter, filter residue is a regenerating ion-exchanger, can reuse;
(10) will go up the step and filter the filtrating obtain, when the 10-20vol% of the most former filtrate volume of evaporated filtrate volume, stop heating at 100 ℃ of following evaporative crystallizations; Be cooled to room temperature, add the hydrochloric acid that 75mL concentration is 36-38wt%, continue 100 ℃ of following evaporation concentration; Separate out as crystal, promptly stop heating, be cooled to room temperature; Separate out crystallization, promptly obtain Platinic chloride.
Claims (9)
1. the ion-exchange recovery method of noble metal platinum in the abandoned car tail-gas catalyst is characterized in that: may further comprise the steps:
1) will discard catalyst breakage and be dissolved in chloroazotic acid, remove by filter solid substance, obtain leach liquor;
2) add silicon-dioxide in the toluene and fully dispersion, the amount ratio of silicon-dioxide and toluene is 1g: (10-25mL);
3) silane coupling agent is added in the system that goes up the step; Wherein, the mass ratio of silane coupling agent and silicon-dioxide is (0.3-0.5): 1;
4) the system thorough mixing that will go up the step disperses, and filters and obtains filter residue, with filter residue and drying, promptly gets ionite;
5) getting step 1) gained leach liquor, the ionite of step 4) gained, water, is 25mL with the three by amount ratio: (1-2.5) g: (75-80) mL carries out the thorough mixing dispersion, filters and obtains filter residue;
6) will go up residue washing, the drying that the step obtains, obtain the platiniferous ionite;
7) will go up ion-exchanger and the abundant mixed and dispersed of the concentrated sulfuric acid that goes on foot platiniferous, and filter and obtain insoluble matter and the filtrating that contains chloroplatinic acid; The amount ratio of the ion-exchanger of being taken in the used concentrated sulfuric acid and the step 5) in this step is (10-25mL): 1g;
8) insolubles is added in the entry, heating is filtered, and obtains filtrating and is dilute sulphuric acid, and filter residue is a regenerating ion-exchanger, reuse capable of circulation; The consumption of water and in the last step amount ratio of the vitriol oil be 1-2:1;
When the filtrating that 9) the step 7) gained is contained Platinic chloride is concentrated into the 10-20% of this former filtrate volume, stop heating, be cooled to room temperature, add the hydrochloric acid of 36-38wt%, continue to be concentrated into crystallization and separate out, stop heating, be cooled to room temperature, separate out crystallization, obtain Platinic chloride; The mass ratio of the ionite of wherein, being taken in the volume of used hydrochloric acid and the step 5) is (10-15mL): 1g.
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 the step 1); The consumption of chloroazotic acid is 2-3 a times of theoretical consumption, and described theoretical consumption is meant the dissolving fully just of the solubilized part in the discarded catalyzer.
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 the step 3), silane coupling agent is KH-540, KH
-792, a kind of among the NQ-62.
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 the step 4), it is at room temperature to stir 5-8h that thorough mixing disperses.
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 the step 4), drying temperature is 50-70 ℃, and be 5-8h time of drying.
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 the step 5), it is to stir 5-8h down at 60-70 ℃ that thorough mixing disperses.
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 the step 6), drying temperature is 50-70 ℃, and be 5-8h time of drying.
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 the step 7), the concentration of the vitriol oil is 80-98wt%.
9. 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 the step 8), the temperature of heating is 90-100 ℃, and the time of heating is 2-4h.
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| CN112899493A (en) * | 2021-01-21 | 2021-06-04 | 有研亿金新材料有限公司 | Method for recovering and purifying platinum from platinum-tungsten alloy |
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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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| 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 |
| US20060167296A1 (en) * | 2002-08-09 | 2006-07-27 | Nathalie Guennouni | Method of preparing halogenoalkyldialkyl chlorosilane |
-
2012
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| CN1123843A (en) * | 1994-11-30 | 1996-06-05 | 核工业北京化工冶金研究院 | Recovery of platinum family elements from waste catalysts |
| JPH08269585A (en) * | 1995-03-28 | 1996-10-15 | Tokyo Electric Power Co Inc:The | Method for separating and recovering platinum family element 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 |
| US20060167296A1 (en) * | 2002-08-09 | 2006-07-27 | Nathalie Guennouni | Method of preparing halogenoalkyldialkyl chlorosilane |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112899493A (en) * | 2021-01-21 | 2021-06-04 | 有研亿金新材料有限公司 | Method for recovering and purifying platinum from platinum-tungsten alloy |
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