CN104342557A - Method for recovering platinum from waste catalyst - Google Patents
Method for recovering platinum from waste catalyst Download PDFInfo
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- CN104342557A CN104342557A CN201310500624.5A CN201310500624A CN104342557A CN 104342557 A CN104342557 A CN 104342557A CN 201310500624 A CN201310500624 A CN 201310500624A CN 104342557 A CN104342557 A CN 104342557A
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- spent catalyst
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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 invention discloses a method for recovering platinum from a waste catalyst. The method is characterized by comprising the following steps: (1) grinding: the waste catalyst is grinded to fine particles; (2) charking: the grinded waste catalyst is roasted for 1 hour; and the roasting temperature is 400-600 DEG C; (3) wet grinding: the treated waste catalyst and a grinding agent are mixed and put in an autoclave for sealing and wet grinding; and the ratio of the catalyst to the grinding agent is 8-10: 1; (4) leaching: the vacuum filtration is performed after the wet grinding to separate solids from liquid; and leaching residues and leaching liquid are put in the autoclave for pressurizing and heating; (5) the refined purification is performed. The method has the following beneficial effects: compared with a traditional recovery method, the method omits a step of acid dissolving in the recovery process, so that the cost is saved, the equipment loss is reduced, the three-waste treatment cost is reduced, and the purposes of reducing the production cost and reducing the production period are finally achieved.
Description
Technical field
The present invention relates to noble metal catalyst and reclaim field, especially a kind of method reclaiming platinum from spent catalyst.
Background technology
The range of application of platinum metals is extremely wide, is called as " modern industry vitamin b6 usp " and " the first high-technology metal ".Wherein platinum is most widely used, consumption is maximum.Be mainly used in chemistry, petrochemical complex catalyzer; Motor car exhaust gas catalysis purifies; Platinum ornaments; Temperature element; Glass, fiber glass industry crucible, bushing etc.
1875, since taking platinum as the process industry of contact process manufacture sulfuric acid of catalyzer, the industrial application of noble metal catalyst emerged in an endless stream.1913, platinum catalysis net was used for preparing nitric acid by ammonia oxidation; Nineteen thirty-seven, Ag/Al
2o
3catalyzer is used for oxidation of ethylene epoxy ethane; 1949, Pt/Al
2o
3catalyzer is used for petroleum reforming and produces high-quality gasoline; Nineteen fifty-nine, PdCl
2-CuCl
2catalyzer is used for oxidation of ethylene acetaldehyde; To late 1960s, there is again synthesizing acetic acid by methanol low-pressure carbonylation rhodium complex catalyst.Most catalyzer is the catalyzer of load highly disperse active metal on porous inorganic carrier.Shape has particulate state, spherical, column, sheet or cellular etc.
Since two thousand three, the application of platinum presents the situation that supply falls short of demand, and the platinum content in catalyzer is far away higher than the content of platinum in mineral reserve, and therefore spent catalyst becomes very important platinum secondary resource, has high recovery value.Existing recovery method mainly contains: mechanically peel method, and the consumption of this method reagent is few, becomes local, but metal dispersion, and technology difficulty is large; Smelting process, this kind of simple cost of method is low, but the rate of recovery is not high, and energy consumption is large; Carrier solubilizes method, this kind of method is simple, but reagent consumption is large, and higher to equipment requirements.
Summary of the invention
For solving the deficiencies in the prior art, the object of this invention is to provide a kind of method reclaiming platinum from inactive noble metal catalyst, possessing skills simple, the advantages such as easy to operate, the rate of recovery is high, agents useful for same reusable edible.
The present invention is achieved through the following technical solutions:
From spent catalyst, reclaim a method for platinum, it is characterized in that, comprise the following steps:
1) grind, spent catalyst is ground to form fine particle;
2) make charcoal, by the spent catalyst roasting 1h after grinding, maturing temperature is 400 ~ 600 DEG C;
3) wet-milling, seal wet-milling by putting into autoclave through the spent catalyst of above-mentioned process and abrasive mixing, the ratio of described catalyzer and abrasive is 8 ~ 10:1;
4) leach, wet ground final vacuum suction filtration, by solid-liquid separation, leached mud and leach liquor put into autoclave jointly, pressurized, heated;
5) essence is purified.
Further, described step 3) wet-milling temperature is 150 ~ 200 degrees Celsius, and reaches a timing in temperature, in still, blast oxygen.
Further, described step 3) abrasive is sodium hydroxide in wet-milling.
Further, described step 4) leach described in leach liquor be 5% ~ 10% NaCN solution.
Further, described step 4) leach described in leach liquor be 7% NaCN solution.
Further, described step 4) leach described in Heating temperature be 140 ~ 160 DEG C, pressure is 1.6 ~ 2MPa.
Further, what blast in still is pure oxygen.
Beneficial effect: compared with existing recovery method, the present invention eliminates this step acid-soluble in removal process, has saved cost, reduces equipment loss, reduces disposal of three wastes expense, finally reaches reduction production cost, reduces the object of production cycle.
Embodiment
In order to make technique means of the present invention, creation characteristic, reach object and effect is easy to understand, below in conjunction with specific embodiment, the present invention is further elaborated.
Embodiment 1
Spent catalyst grinds to form fine particle, spent catalyst after grinding is put into retort furnace roasting 1h, maturing temperature is 400 DEG C, after cooling, seal wet-milling by putting into autoclave through the spent catalyst of above-mentioned process and the mixing of abrasive sodium hydroxide, the ratio of catalyzer and abrasive is 8:1, and wet-milling temperature is 150 DEG C, and when temperature reaches 140 DEG C, in still, blast oxygen.Raw material after wet ground is through vacuum filtration, and by solid-liquid separation, leached mud and leach liquor put into autoclave jointly, and leach liquor is the NaCN solution of 5%, and leaching Heating temperature is 140 DEG C, and pressure is 1.6MPa, and recording platinum leaching yield after cooling is 90%.
Embodiment 2
Spent catalyst grinds to form fine particle, spent catalyst after grinding is put into retort furnace roasting 1h, maturing temperature is 400 DEG C, after cooling, seal wet-milling by putting into autoclave through the spent catalyst of above-mentioned process and the mixing of abrasive sodium hydroxide, the ratio of catalyzer and abrasive is 8:1, and wet-milling temperature is 170 DEG C, and when temperature reaches 160 DEG C, in still, blast oxygen.Raw material after wet ground is through vacuum filtration, and by solid-liquid separation, leached mud and leach liquor put into autoclave jointly, and leach liquor is the NaCN solution of 5%, and leaching Heating temperature is 160 DEG C, and pressure is 2MPa, and recording platinum leaching yield after cooling is 94%.
Embodiment 3
Spent catalyst grinds to form fine particle, spent catalyst after grinding is put into retort furnace roasting 1h, maturing temperature is 500 DEG C, after cooling, seal wet-milling by putting into autoclave through the spent catalyst of above-mentioned process and the mixing of abrasive sodium hydroxide, the ratio of catalyzer and abrasive is 10:1, and wet-milling temperature is 200 DEG C, and when temperature reaches 170 DEG C, in still, blast oxygen.Raw material after wet ground is through vacuum filtration, and by solid-liquid separation, leached mud and leach liquor put into autoclave jointly, and leach liquor is the NaCN solution of 7%, and leaching Heating temperature is 140 DEG C, and pressure is 1.6 ~ 2MPa, and recording platinum leaching yield after cooling is 93%.
Embodiment 4
Spent catalyst grinds to form fine particle, spent catalyst after grinding is put into retort furnace roasting 1h, maturing temperature is 600 DEG C, after cooling, seal wet-milling by putting into autoclave through the spent catalyst of above-mentioned process and the mixing of abrasive sodium hydroxide, the ratio of catalyzer and abrasive is 10:1, and wet-milling temperature is 200 DEG C, and when temperature reaches 175 DEG C, in still, blast oxygen.Raw material after wet ground is through vacuum filtration, and by solid-liquid separation, leached mud and leach liquor put into autoclave jointly, and leach liquor is the NaCN solution of 10%, and leaching Heating temperature is 160 DEG C, and pressure is 2MPa, and recording platinum leaching yield after cooling is 95%.
Claims (7)
1. from spent catalyst, reclaim a method for platinum, it is characterized in that, comprise the following steps:
1) grind, spent catalyst is ground to form fine particle;
2) make charcoal, by the spent catalyst roasting 1h after grinding, maturing temperature is 400 ~ 600 DEG C;
3) wet-milling, seal wet-milling by putting into autoclave through the spent catalyst of above-mentioned process and abrasive mixing, the ratio of described catalyzer and abrasive is 8 ~ 10:1;
4) leach, wet ground final vacuum suction filtration, by solid-liquid separation, leached mud and leach liquor put into autoclave jointly, pressurized, heated;
5) essence is purified.
2. a kind of method reclaiming platinum from spent catalyst according to claim 1, it is characterized in that, described step 3) wet-milling temperature is 150 ~ 200 degrees Celsius, and reach a timing in temperature, in still, blast the one in air, elevated oxygen level air or pure oxygen.
3. a kind of method reclaiming platinum from spent catalyst according to claim 1, is characterized in that, described step 3) abrasive is sodium hydroxide in wet-milling.
4. a kind of method reclaiming platinum from spent catalyst according to claim 1, is characterized in that, described step 4) leach described in leach liquor be 5% ~ 10% NaCN solution.
5. a kind of method reclaiming platinum from spent catalyst according to claim 1, is characterized in that, described step 4) leach described in leach liquor be 7% NaCN solution.
6. a kind of method reclaiming platinum from spent catalyst according to claim 1, is characterized in that, described step 4) leach described in Heating temperature be 140 ~ 160 DEG C, pressure is 1.6 ~ 2MPa.
7. a kind of method reclaiming platinum from spent catalyst according to claim 2, is characterized in that, what blast in still is pure oxygen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310500624.5A CN104342557A (en) | 2013-10-22 | 2013-10-22 | Method for recovering platinum from waste catalyst |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310500624.5A CN104342557A (en) | 2013-10-22 | 2013-10-22 | Method for recovering platinum from waste catalyst |
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| CN104342557A true CN104342557A (en) | 2015-02-11 |
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| CN201310500624.5A Pending CN104342557A (en) | 2013-10-22 | 2013-10-22 | Method for recovering platinum from waste catalyst |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105506288A (en) * | 2015-11-17 | 2016-04-20 | 上海派特贵金属环保科技有限公司 | Method and equipment for recycling platinum from invalid automobile exhaust catalyst |
Citations (5)
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|---|---|---|---|---|
| CN1417356A (en) * | 2001-11-07 | 2003-05-14 | 昆明贵金属研究所 | Extraction of platinum family metals and Cu, Ni and Co from sulfide ore or floated concentrate of platinum family metals |
| CN1861816A (en) * | 2005-05-13 | 2006-11-15 | 河南科技大学 | Tech. of recovering old silver platinum noble metals from antimony-smelting waste slag |
| CN102808084A (en) * | 2012-08-14 | 2012-12-05 | 云南大学 | Method for enriching platinum and palladium from pressurized cyanating solution |
| CN102936658A (en) * | 2011-08-15 | 2013-02-20 | 深圳市格林美高新技术股份有限公司 | Recovery method for platinum, aluminium and rhenium from waste reforming catalyst |
| CN103194606A (en) * | 2013-03-28 | 2013-07-10 | 贵研资源（易门）有限公司 | Method for concentrating platinum group metals from alumina-based waste catalyst |
-
2013
- 2013-10-22 CN CN201310500624.5A patent/CN104342557A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1417356A (en) * | 2001-11-07 | 2003-05-14 | 昆明贵金属研究所 | Extraction of platinum family metals and Cu, Ni and Co from sulfide ore or floated concentrate of platinum family metals |
| CN1861816A (en) * | 2005-05-13 | 2006-11-15 | 河南科技大学 | Tech. of recovering old silver platinum noble metals from antimony-smelting waste slag |
| CN102936658A (en) * | 2011-08-15 | 2013-02-20 | 深圳市格林美高新技术股份有限公司 | Recovery method for platinum, aluminium and rhenium from waste reforming catalyst |
| CN102808084A (en) * | 2012-08-14 | 2012-12-05 | 云南大学 | Method for enriching platinum and palladium from pressurized cyanating solution |
| CN103194606A (en) * | 2013-03-28 | 2013-07-10 | 贵研资源（易门）有限公司 | Method for concentrating platinum group metals from alumina-based waste catalyst |
Non-Patent Citations (1)
| Title |
|---|
| 黄昆: "加压氰化法提取铂族金属新工艺研究", 《中国优秀博硕士学位论文全文数据库（博士）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105506288A (en) * | 2015-11-17 | 2016-04-20 | 上海派特贵金属环保科技有限公司 | Method and equipment for recycling platinum from invalid automobile exhaust catalyst |
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Effective date of registration: 20160523 Address after: 201512, No. 468, Golden Ring Road, Jinshan Wei Town, Shanghai, Jinshan District Applicant after: SHANGHAI PAITE PRECIOUS METALS ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. Address before: 201512 No. 1148, Longsheng Road, Jinshan District petrochemical, Shanghai Applicant before: SHANGHAI PAITE PRECIOUS METALS ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. Applicant before: Zhang Baoliang |
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Application publication date: 20150211 |