CN107523692A - A kind of acidleach drop aluminium technique of high alumina failure tail-gas catalyst - Google Patents
A kind of acidleach drop aluminium technique of high alumina failure tail-gas catalyst Download PDFInfo
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- CN107523692A CN107523692A CN201710742934.6A CN201710742934A CN107523692A CN 107523692 A CN107523692 A CN 107523692A CN 201710742934 A CN201710742934 A CN 201710742934A CN 107523692 A CN107523692 A CN 107523692A
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- high alumina
- palladium
- obtains
- aluminum oxide
- gas catalyst
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/0015—Obtaining aluminium by wet processes
- C22B21/0023—Obtaining aluminium by wet processes from waste materials
- C22B21/003—Obtaining aluminium by wet processes from waste materials from spent catalysts
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- 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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Abstract
The present invention relates to a kind of acidleach of high alumina failure tail-gas catalyst to drop aluminium technique.Present invention process step is：High alumina failure tail-gas catalyst is levigate to the mesh of granularity=200~250, to it in add 0.1%~0.5% starch of high alumina failure tail-gas catalyst quality, be put into after mixing in reactor；Solid-liquid mass volume ratio 1 is pressed into above-mentioned mixed material:4~5 add water stirring 0.5h, add the concentrated sulfuric acid 1~2mol/L of Controlled acidity, are forced into 0.5~2Mpa, 100~150 DEG C of temperature, react 1~3h, be cooled to 50~60 DEG C, blowing filters after pressure release to normal pressure, obtains the filter residue containing platinum, palladium, rhodium and the filtrate containing aluminium；Pyrometallurgical smelting is carried out to filter residue, obtains platinum, palladium, rhodium noble metal, filtrate is precipitated by liquid caustic soda, obtains aluminum oxide.The platinum, palladium, rhodium noble metal direct yield of the present invention is all higher than 99.5%, 1.5 times of concentration of precious metal, the leaching rate of aluminum oxide is more than 85%, most of aluminum oxide is transferred in solution, convenience is provided for follow-up pyrometallurgical smelting, acidity is low in liquid leach simultaneously after, and liquid caustic soda consumption is small, and the aluminum oxide reclaimed in solution is easier to.
Description
Technical field
The present invention relates to a kind of acidleach of high alumina failure tail-gas catalyst to drop aluminium technique.
Background technology
As the concern that country administers to automobile exhaust pollution is more and more closer, China's auto-exhaust catalyst is promoted
Flourish, due to noble metal auto-exhaust catalyst high comprehensive performance and long service life the characteristics of so that your gold
Metal catalyst is occupied an leading position in vehicle exhaust industry.Auto-exhaust catalyst containing noble metal is developed so far, and main flow is with aluminum oxide
Graininess for carrier and cellular two kinds of existence forms using cordierite as main component.
The technique top priority that noble metal is reclaimed from automobile dead catalyst is pyrometallurgical smelting conversion sulphidisation technology, burnt
The technology such as burning or wet-leaching, reaches carrier and noble metal efficiently separates, then wet-process beneficiation obtains the process of concentrate separation refining.
In the evolution of Wet technique, because aluminum oxide has part with α-Al2O3Form exist, noble metal wrap up wherein, then
Inertia is converted into plus noble metal generation oxidation, vulcanization, phosphorization or forms special alloy, compound absorption organic matter
Third brings other impurity into, and the above situation noble metal easily loses activity, it is difficult to dissolves, above method noble metal yield is relatively low, dirty
It is high to contaminate processing cost, and handle low-grade material noble metal yield further to reduce.
The problem of being existed using thermal process processing catalyst is alumina content height, and slag making viscosity is big, need to be introduced a large amount of
Fluxing agent, the melting output quantity of slag is big, and precious metal losses are more.The content that aluminum oxide is reduced by wet method is connected pyrometallurgical smelting energy
Reaching reduces the purpose of smelting temperature and fluxing agent addition, and the technique noble metal entirety high income, Technological adaptability is strong, processing
Scale is big, but the problems such as leaching rate of alumina is unstable, and palladium easily loses in wet process be present.
The content of the invention
The purpose of the present invention is that a kind of acidleach of high alumina failure tail-gas catalyst is provided the problem of presence for prior art
Aluminium technique drops.
The concrete technical scheme of the present invention is as follows：
A kind of acidleach drop aluminium technique of high alumina failure tail-gas catalyst, comprises the following steps：
（1）High alumina failure tail-gas catalyst is levigate to the mesh of granularity -200~-250, to it in add high alumina failure tail gas catalyzed
0.1%~0.5% starch of agent quality, is put into reactor after mixing；
（2）To step（1）Mixed material in press solid-liquid mass volume ratio 1:4~5 add water stirring 0.5h, add concentrated sulfuric acid control
Relieving haperacidity 1~2mol/L of degree, 0.5~2Mpa is forced into, 100~150 DEG C of temperature, reacts 1~3h；
（3）50~60 DEG C are cooled to, blowing filters after pressure release to normal pressure, obtains the filter residue containing platinum, palladium, rhodium and the filter containing aluminium
Liquid；
（4）To step（3）Obtained filter residue carries out pyrometallurgical smelting, obtains platinum, palladium, rhodium noble metal；
（5）To step（3）Obtained filtrate is precipitated by liquid caustic soda, obtains aluminum oxide.
The invention has the advantages that：
1st, platinum, palladium, rhodium noble metal direct yield is all higher than 99.5%；2nd, 1.5 times of concentration of precious metal, the leaching rate of aluminum oxide are more than 85%.
Most of aluminum oxide is transferred in solution, convenience is provided for follow-up pyrometallurgical smelting；3rd, acidity is low in liquid after leaching, and liquid caustic soda disappears
Consumption is small, and the aluminum oxide reclaimed in solution is easier to.
Embodiment
Embodiment 1
High alumina failure tail-gas catalyst is levigate to the mesh of granularity -230, to its interior addition high alumina failure tail-gas catalyst quality
0.2% starch, it is put into after mixing in reactor；Solid-liquid mass volume ratio 1 is pressed into above-mentioned mixed material:5 add water stirring
0.5h, concentrated sulfuric acid Controlled acidity 1.5mol/L is added, be forced into 0.9Mpa, 150 DEG C of temperature, react 2h, be cooled to 55 DEG C, pressure release
Blowing filters after to normal pressure, obtains the filter residue containing platinum, palladium, rhodium and the filtrate containing aluminium；Pyrometallurgical smelting is carried out to filter residue, obtains platinum
Palladium rhodium noble metal, filtrate are precipitated by liquid caustic soda, obtain aluminum oxide.
Using above-mentioned technique, the direct yield of platinum, palladium, rhodium is all higher than 99.6%, 1.4 times of concentration of precious metal, grade alumina leaching
Rate is more than 85%, and bullion content is less than 0.0002g/L in waste liquid, and outer row's standard is reached after recovered aluminum oxide.
Embodiment 2
High alumina failure tail-gas catalyst is levigate to the mesh of granularity -250, to its interior addition high alumina failure tail-gas catalyst quality
0.3% starch, it is put into after mixing in reactor；Solid-liquid mass volume ratio 1 is pressed into above-mentioned mixed material:4 add water stirring
0.5h, concentrated sulfuric acid Controlled acidity 2mol/L is added, be forced into 1Mpa, 140 DEG C of temperature, react 2.5h, be cooled to 60 DEG C, pressure release is extremely
Blowing filters after normal pressure, obtains the filter residue containing platinum, palladium, rhodium and the filtrate containing aluminium；Pyrometallurgical smelting is carried out to filter residue, obtains platinum palladium
Rhodium noble metal, filtrate are precipitated by liquid caustic soda, obtain aluminum oxide.
Using above-mentioned technique, the direct yield of platinum, palladium, rhodium is all higher than 99.5%, 1.5 times of concentration of precious metal, grade alumina leaching
Rate is more than 86%, and bullion content is less than 0.0002g/L in waste liquid, and outer row's standard is reached after recovered aluminum oxide.
Embodiment 3
High alumina failure tail-gas catalyst is levigate to the mesh of granularity -240, to its interior addition high alumina failure tail-gas catalyst quality
0.5% starch, it is put into after mixing in reactor；Solid-liquid mass volume ratio 1 is pressed into above-mentioned mixed material:4 add water stirring
0.5h, concentrated sulfuric acid Controlled acidity 1mol/L is added, be forced into 1.5Mpa, 130 DEG C of temperature, react 2.5h, be cooled to 57 DEG C, pressure release
Blowing filters after to normal pressure, obtains the filter residue containing platinum, palladium, rhodium and the filtrate containing aluminium；Pyrometallurgical smelting is carried out to filter residue, obtains platinum
Palladium rhodium noble metal, filtrate are precipitated by liquid caustic soda, obtain aluminum oxide.
Using above-mentioned technique, the direct yield of platinum, palladium, rhodium is all higher than 99.5%, 1.6 times of concentration of precious metal, grade alumina leaching
Rate is more than 86%, and bullion content is less than 0.0002g/L in waste liquid, and outer row's standard is reached after recovered aluminum oxide.
Claims (1)
1. the acidleach drop aluminium technique of a kind of high alumina failure tail-gas catalyst, it is characterised in that comprise the following steps：
（1）High alumina failure tail-gas catalyst is levigate to the mesh of granularity -200~-250, to it in add high alumina failure tail gas catalyzed
0.1%~0.5% starch of agent quality, is put into reactor after mixing；
（2）To step（1）Mixed material in press solid-liquid mass volume ratio 1:4~5 add water stirring 0.5h, add concentrated sulfuric acid control
Relieving haperacidity 1~2mol/L of degree, 0.5~2Mpa is forced into, 100~150 DEG C of temperature, reacts 1~3h；
（3）50~60 DEG C are cooled to, blowing filters after pressure release to normal pressure, obtains the filter residue containing platinum, palladium, rhodium and the filter containing aluminium
Liquid；
（4）To step（3）Obtained filter residue carries out pyrometallurgical smelting, obtains platinum, palladium, rhodium noble metal；
（5）To step（3）Obtained filtrate is precipitated by liquid caustic soda, obtains aluminum oxide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710742934.6A CN107523692A (en) | 2017-08-25 | 2017-08-25 | A kind of acidleach drop aluminium technique of high alumina failure tail-gas catalyst |
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| CN201710742934.6A CN107523692A (en) | 2017-08-25 | 2017-08-25 | A kind of acidleach drop aluminium technique of high alumina failure tail-gas catalyst |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184465A (en) * | 2019-05-31 | 2019-08-30 | 贵研资源（易门）有限公司 | A method of recycling rare precious metal from spent automotive exhaust catalysts |
| CN113234931A (en) * | 2021-05-14 | 2021-08-10 | 昆明理工大学 | Failure Pt/Al2O3Method for comprehensively recovering platinum and aluminum from catalyst |
Citations (4)
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|---|---|---|---|---|
| CN1342779A (en) * | 2000-12-29 | 2002-04-03 | 张方宇 | Process for recovering metals Pt, Re and Al from waste reforming catalyst |
| CN101036889A (en) * | 2006-03-14 | 2007-09-19 | 上海耀华铂制品有限公司 | Recycling method of catalyzer having platinum |
| CN104060095A (en) * | 2014-06-17 | 2014-09-24 | 励福实业（江门）贵金属有限公司 | Method of recovering palladium from palladium-loading aluminum oxide waste catalyst |
| CN104831071A (en) * | 2015-04-08 | 2015-08-12 | 昆明理工大学 | Method for recovering platinum and palladium from waste carrier catalyst by hydrothermal method |
-
2017
- 2017-08-25 CN CN201710742934.6A patent/CN107523692A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1342779A (en) * | 2000-12-29 | 2002-04-03 | 张方宇 | Process for recovering metals Pt, Re and Al from waste reforming catalyst |
| CN101036889A (en) * | 2006-03-14 | 2007-09-19 | 上海耀华铂制品有限公司 | Recycling method of catalyzer having platinum |
| CN104060095A (en) * | 2014-06-17 | 2014-09-24 | 励福实业（江门）贵金属有限公司 | Method of recovering palladium from palladium-loading aluminum oxide waste catalyst |
| CN104831071A (en) * | 2015-04-08 | 2015-08-12 | 昆明理工大学 | Method for recovering platinum and palladium from waste carrier catalyst by hydrothermal method |
Non-Patent Citations (2)
| Title |
|---|
| 刘时杰编: "《铂族金属冶金学》", 30 June 2013, 中南大学出版社 * |
| 赵雨等: "硫酸加压溶解法从氧化铝基废催化剂中回收铂", 《贵金属》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184465A (en) * | 2019-05-31 | 2019-08-30 | 贵研资源（易门）有限公司 | A method of recycling rare precious metal from spent automotive exhaust catalysts |
| CN113234931A (en) * | 2021-05-14 | 2021-08-10 | 昆明理工大学 | Failure Pt/Al2O3Method for comprehensively recovering platinum and aluminum from catalyst |
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Application publication date: 20171229 |