CN106011467A - Method for extracting gold/silver from oxidized graphene - Google Patents
Method for extracting gold/silver from oxidized graphene Download PDFInfo
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- CN106011467A CN106011467A CN201610533960.3A CN201610533960A CN106011467A CN 106011467 A CN106011467 A CN 106011467A CN 201610533960 A CN201610533960 A CN 201610533960A CN 106011467 A CN106011467 A CN 106011467A
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- silver
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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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
- C22B3/24—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition by adsorption on solid substances, e.g. by extraction with solid resins
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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
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention belongs to the technical field of wet metallurgy, and particularly relates to a method for extracting gold/silver from oxidized graphene. A gold/silver cyano complex solution is prepared through a gold/silver standard solution and cyanide; the oxidized graphene is placed in the gold/silver cyano complex solution to adsorb a gold/silver cyano complex for 5 h-50 h; and the oxidized graphene is separated, the gold/silver cyano complex is desorbed from the oxidized graphene, accordingly, the gold/silver is extracted, and meanwhile the desorbed oxidized graphene can be repeatedly used. The method has the beneficial effects that the large specific surface, the abundant functional group and high-activity sites of the oxidized graphene are utilized for adsorbing the gold/silver cyano complex, and therefore the purpose of extracting the gold/silver is achieved; and meanwhile, due to the fact that the surface of the oxidized graphene is completely exposed, the gold/silver complex adsorbed to the surface is prone to desorption, and adsorbent can be repeatedly utilized. The method is easy to operate, the gold/silver can be rapidly and effectively extracted, and the oxidized graphene can be repeatedly used and is low in cost.
Description
Technical field
The invention belongs to technical field of wet metallurgy, be specifically related to a kind of method utilizing graphene oxide to extract gold/silver.
Background technology
Hydrometallurgy industry mainly has from containing the method extracting gold/silver cyano complex gold/your liquid silver-colored: zinc method of cementation, electrolysis are sunk
Area method, ion exchange resin exchange adsorption method, active carbon adsorption.Zinc method of cementation cost of investment is low, but replacing velocity is slow, all
Phase is long；Strike power consumption is big；Ion exchange resin exchange adsorption method selectivity is bad, cost is high.Therefore three all cannot be used for
On a large scale, from gold/your liquid silver-colored, gold/silver is extracted at low cost.Activated carbon has bigger specific surface area, abundant hole due to it
Structure, more functional group, become the fertile absorber extracting gold/silver.The bigger serface of activated carbon is primarily due to it and enriches
Mesoporous, microcellular structure, and these pore passage structures have slowed down the activated carbon absorption to gold/silver cyano complex, and easy when it adsorbs
Blocking, hinders its continuation absorption to gold/silver cyano complex, reduces the utilization rate of activated carbon hole, and the gold in duct/silver cyanogen network
Compound is difficult to desorption, have impact on reusing of activated carbon.Therefore being badly in need of finding one can rapidly and efficiently ADSORPTION OF GOLD/silver cyano complex
To extract gold/silver, and can reusable adsorbent.
Summary of the invention
The purpose of the present invention is to propose to a kind of method utilizing graphene oxide to extract gold/silver, it overcomes existing gold/silver extracting method
Present in extraction rate is slow, efficiency is low, golden/silver is difficult to desorption, adsorbent such as can not reuse at the problem, it is easy to quick adsorption
And desorption gold/silver.
The present invention solves above-mentioned technical problem and be the technical scheme is that the method utilizing graphene oxide to extract gold/silver, uses
Gold/silver label liquid and cyanide preparation gold/silver cyano complex solution；Graphene oxide is placed in ADSORPTION OF GOLD in gold/silver cyano complex solution/
Silver cyano complex 5-50h；Separate graphene oxide, gold/silver cyano complex is desorbed from graphene oxide, to extract gold/silver,
The graphene oxide being simultaneously desorbed is reusable.
By such scheme, described graphene oxide is the surface Graphene with oxygenated functional group.
By such scheme, described graphene oxide consumption is 0.01-1g, and the consumption of described gold/silver cyano complex solution is
50-1000ml, the gold/silver concentration in described gold/silver cyano complex solution is 10-1000mg/l.
By such scheme, described graphene oxide is powder.
By such scheme, described by the concrete operation step that gold/silver cyano complex is desorbed from graphene oxide it is: put it into and contain
In 0.01-1M cyanide, 0.05-0.5M NaOH aqueous solution under the conditions of 70-90 DEG C magnetic stirrer 3-10h.
By such scheme, described cyanide is Cyanogran. or potassium cyanide.
By such scheme, described gold/silver cyano complex is Au in gold/silver label liquid+/Ag+With CN in cyanide-Formed with
Au(CN)2 -/Ag(CN)2 -The complex that form exists.
By such scheme, the method for described separation graphene oxide is sucking filtration or centrifugation.
The present invention utilizes the features such as graphene oxide specific surface area is big, functional group abundant, avtive spot is the most exposed from gold/your liquid silver-colored
Middle ADSORPTION OF GOLD/silver cyano complex, and be desorbed gold/silver cyano complex from graphene oxide further to reach to reclaim gold/silver, inhale
Attached dose of reusable purpose.
The beneficial effects of the present invention is: utilize the Large ratio surface of graphene oxide, abundant functional group, high activity site ADSORPTION OF GOLD/
Silver cyano complex thus reach extract gold/silver purpose, simultaneously because surface of graphene oxide is the most exposed, be adsorbed in the gold on surface
/ silver complex is prone to desorption, can realize reusing of adsorbent.The method is simple to operate, can fast and effeciently extract gold/silver,
And graphene oxide is reusable, low cost.
Detailed description of the invention
Being described further the present invention below in conjunction with embodiment, the scope of protection of present invention is not limited to embodiment statement
Scope:
Embodiment 1.
The gold-cyanide complex solution that gold concentration is 100mg/l is prepared with gold mark liquid and Cyanogran.；Subsequently 0.01g graphene oxide is put
ADSORPTION OF GOLD cyano complex 30h in 100ml gold-cyanide complex solution；Centrifugation graphene oxide, calculates to obtain oxidation stone after tested
Ink alkene reaches 524mg/g to the adsorbance of gold.Graphene oxide is placed in 20ml water-soluble containing 0.01M NaCN, 0.05M NaOH
Liquid, is warming up to 80 DEG C, and magnetic agitation 3h desorption gold-cyanide complex extracts gold, and the graphene oxide of desorption is reusable.
Embodiment 2.
The gold-cyanide complex solution that gold concentration is 10mg/l is prepared with gold mark liquid and Cyanogran.；Subsequently 0.01g graphene oxide is put
ADSORPTION OF GOLD cyano complex 5h in 50ml gold-cyanide complex solution；Centrifugation graphene oxide, calculate after tested in solution
Gold-cyanide complex is extracted the most substantially.Graphene oxide is placed in 20ml and contains in 0.05M NaCN, 0.1M NaOH aqueous solution,
Being warming up to 70 DEG C, magnetic agitation 5h desorption gold-cyanide complex extracts gold.Graphene oxide after desorption is continued absorption 50ml gold
Concentration is the gold-cyanide complex solution 5h of 10mg/l, centrifugation graphene oxide, calculates to obtain the golden cyanogen of 90% in solution after tested
Complex is extracted.
Embodiment 3.
The gold-cyanide complex solution that gold concentration is 1000mg/l is prepared with gold mark liquid and potassium cyanide；Subsequently 1g graphene oxide is put
ADSORPTION OF GOLD cyano complex 50h in 1000ml gold-cyanide complex solution；Sucking filtration obtains graphene oxide, calculates to obtain oxidation stone after tested
Ink alkene reaches 721mg/g to the adsorbance of gold.Graphene oxide is placed in 50ml and contains in 1M KCN, 0.5M NaOH aqueous solution,
Being warming up to 90 DEG C, magnetic agitation 10h desorption gold-cyanide complex extracts gold.Graphene oxide after desorption is continued absorption 1000ml
Gold concentration is the gold-cyanide complex solution 50h of 1000mg/l, and centrifugation graphene oxide calculates to obtain graphene oxide pair after tested
The adsorbance of gold reaches 605mg/g.
Embodiment 4.
The gold-cyanide complex solution that gold concentration is 600mg/l is prepared with gold mark liquid and potassium cyanide；Subsequently 0.5g graphene oxide is put
ADSORPTION OF GOLD cyano complex 30h in 500ml gold-cyanide complex solution；Sucking filtration obtains graphene oxide, calculates to obtain oxidation stone after tested
Ink alkene reaches 550mg/g to the adsorbance of gold.Graphene oxide is placed in 50ml containing 0.05M KCN, 0.1M NaOH aqueous solution
In, it being warming up to 80 DEG C, magnetic agitation 5h desorption gold-cyanide complex extracts gold.Graphene oxide after desorption is continued absorption 500ml
Gold concentration is the gold-cyanide complex solution 30h of 600mg/l, centrifugation graphene oxide, calculate after tested graphene oxide to gold
Adsorbance reach 508mg/g.Graphene oxide is placed in 50ml and contains in 0.05M KCN, 0.1M NaOH aqueous solution, heat up
To 80 DEG C, magnetic agitation 5h desorption gold-cyanide complex extracts gold.Graphene oxide after desorption is continued absorption 500ml gold dense
Degree is the gold-cyanide complex solution 30h of 600mg/l, centrifugation graphene oxide, calculates to obtain the graphene oxide suction to gold after tested
Attached amount reaches 436mg/g.
Embodiment 5.
The silver-colored cyano complex solution that silver concentration is 100mg/l is prepared with silver label liquid and potassium cyanide；Subsequently 0.1g graphene oxide is put
Adsorption For Ag cyano complex 24h in 250ml silver cyano complex solution；Centrifugation graphene oxide, calculates to obtain oxidation stone after tested
Ink alkene reaches 314mg/g to the adsorbance of silver.Graphene oxide is placed in 20ml containing 0.1M NaCN, 0.2M NaOH aqueous solution
In, it being warming up to 80 DEG C, magnetic agitation 8h desorption silver cyano complex extracts silver.Graphene oxide after desorption is continued absorption 250ml
Silver concentration is the silver-colored cyano complex solution 24h of 100mg/l, centrifugation graphene oxide, calculate after tested graphene oxide to silver
Adsorbance reach 252mg/g.
Embodiment 6.
The silver-colored cyano complex solution that silver concentration is 500mg/l is prepared with silver label liquid and Cyanogran.；Subsequently 0.5g graphene oxide is put
Adsorption For Ag cyano complex 30h in 500ml silver cyano complex solution；Sucking filtration obtains graphene oxide, calculates to obtain oxidation stone after tested
Ink alkene reaches 603mg/g to the adsorbance of silver.Graphene oxide is placed in 50ml containing 0.05M NaCN, 0.1M NaOH aqueous solution
In, it being warming up to 85 DEG C, magnetic agitation 8h desorption silver cyano complex extracts silver.Graphene oxide after desorption is continued absorption 500ml
Silver concentration is the silver-colored cyano complex solution 30h of 500mg/l, centrifugation graphene oxide, calculate after tested graphene oxide to silver
Adsorbance reach 516mg/g.Graphene oxide is placed in 50ml and contains in 0.05M NaCN, 0.1M NaOH aqueous solution, heat up
To 85 DEG C, magnetic agitation 8h desorption silver cyano complex extracts silver.Graphene oxide after desorption is continued absorption 500ml silver dense
Degree is the silver-colored cyano complex solution 30h of 500mg/l, centrifugation graphene oxide, calculates to obtain the graphene oxide suction to silver after tested
Attached amount reaches 412mg/g.
Claims (8)
1. the method utilizing graphene oxide to extract gold/silver, uses gold/silver label liquid and cyanide preparation gold/silver cyano complex solution；
Graphene oxide is placed in ADSORPTION OF GOLD/silver cyano complex 5-50h in gold/silver cyano complex solution；Separate graphene oxide, by gold/
Silver cyano complex is desorbed from graphene oxide, and to extract gold/silver, the graphene oxide being simultaneously desorbed is reusable.
2. the graphene oxide that utilizes as described in claim 1 extracts golden/silver-colored method, it is characterised in that described graphene oxide
For surface with the Graphene of oxygenated functional group.
3. the graphene oxide that utilizes as described in claim 1 extracts golden/silver-colored method, it is characterised in that described graphite oxide
Alkene consumption is 0.01-1g, and the consumption of described gold/silver cyano complex solution is 50-1000ml, described gold/silver cyano complex solution
In gold/silver concentration be 10-1000mg/l.
4. the graphene oxide that utilizes as described in claim 1 extracts golden/silver-colored method, it is characterised in that described graphene oxide
For powder.
5. the graphene oxide that utilizes as described in claim 1 extracts golden/silver-colored method, it is characterised in that described by gold/silver cyanogen network
The concrete operation step that compound is desorbed from graphene oxide is: put it into containing 0.01-1M cyanide, 0.05-0.5M NaOH
In aqueous solution under the conditions of 70-90 DEG C magnetic stirrer 3-10h.
6. the graphene oxide that utilizes as described in claim 5 extracts golden/silver-colored method, it is characterised in that described cyanide is cyanogen
Change sodium or potassium cyanide.
7. the graphene oxide that utilizes as described in claim 1 extracts golden/silver-colored method, it is characterised in that described gold/silver cyanogen complexation
Thing is Au in gold/silver label liquid+/Ag+With CN in cyanide-Formed with Au (CN)2 -/Ag(CN)2 -The complex that form exists.
8. the graphene oxide that utilizes as described in claim 1 extracts golden/silver-colored method, it is characterised in that described separation oxidation stone
The method of ink alkene is sucking filtration or centrifugation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610533960.3A CN106011467A (en) | 2016-07-08 | 2016-07-08 | Method for extracting gold/silver from oxidized graphene |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610533960.3A CN106011467A (en) | 2016-07-08 | 2016-07-08 | Method for extracting gold/silver from oxidized graphene |
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| CN106011467A true CN106011467A (en) | 2016-10-12 |
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| CN201610533960.3A Pending CN106011467A (en) | 2016-07-08 | 2016-07-08 | Method for extracting gold/silver from oxidized graphene |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832355A (en) * | 2021-09-16 | 2021-12-24 | 清华大学深圳国际研究生院 | Method for recovering gold from solution containing gold ions |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109224A (en) * | 1984-12-03 | 1986-09-24 | 霍麦斯塔克矿山公司 | Gold recovery process |
| CN101451191A (en) * | 2007-11-30 | 2009-06-10 | 灵宝市金源矿业有限责任公司 | Fast gold-leaching process by CIP process |
| CN103418166A (en) * | 2013-08-05 | 2013-12-04 | 南昌大学 | Method for adsorbing and separating low-concentration rare earth ions with oxidized graphene colloid |
| CN104744618A (en) * | 2013-12-25 | 2015-07-01 | 浙江衢州万能达科技有限公司 | Preparation method for gold adsorption resin modified by lactam radical |
-
2016
- 2016-07-08 CN CN201610533960.3A patent/CN106011467A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109224A (en) * | 1984-12-03 | 1986-09-24 | 霍麦斯塔克矿山公司 | Gold recovery process |
| CN101451191A (en) * | 2007-11-30 | 2009-06-10 | 灵宝市金源矿业有限责任公司 | Fast gold-leaching process by CIP process |
| CN103418166A (en) * | 2013-08-05 | 2013-12-04 | 南昌大学 | Method for adsorbing and separating low-concentration rare earth ions with oxidized graphene colloid |
| CN104744618A (en) * | 2013-12-25 | 2015-07-01 | 浙江衢州万能达科技有限公司 | Preparation method for gold adsorption resin modified by lactam radical |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832355A (en) * | 2021-09-16 | 2021-12-24 | 清华大学深圳国际研究生院 | Method for recovering gold from solution containing gold ions |
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