CN102776382A - Extraction process for precious metals - Google Patents
Extraction process for precious metals Download PDFInfo
- Publication number
- CN102776382A CN102776382A CN2011101182249A CN201110118224A CN102776382A CN 102776382 A CN102776382 A CN 102776382A CN 2011101182249 A CN2011101182249 A CN 2011101182249A CN 201110118224 A CN201110118224 A CN 201110118224A CN 102776382 A CN102776382 A CN 102776382A
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- CN
- China
- Prior art keywords
- hydrochloric acid
- precious metals
- extraction
- thiourea
- extraction process
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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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- Manufacture And Refinement Of Metals (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
Precious metals are expensive and rare, so recovery of precious metals is necessary. An extraction process provided by the invention is used for extraction and recovery of a trace amount of precious metals in a quaternary ammonium salt organic mixed solution. According to the invention, a thiourea/hydrochloric acid/ethanol solution is used for extraction of the precious metals; in the thiourea/hydrochloric acid/ethanol solution, the concentration of hydrochloric acid is 0 to 1 mol/L, the concentration of thiourea is 0 to 2 mol/L, and a volume ratio of hydrochloric acid to ethanol is 1: 1 to 10: 1.
Description
(1) technical field
The present invention relates to the Study on extraction of thiocarbamide/hydrochloric acid/ethanolic soln to precious metal.
(2) background technology
Precious metal mainly refers to gold and silver and platinum metals 8 kinds of metallic elements such as (ruthenium, rhodium, palladium, osmium, iridium, platinum).They cost an arm and a leg, resource scarcity.Rare Metals has several different methods, most importantly liquid-liquid extraction.Arquad is because loading capacity is high, partition ratio is big, power speed is fast and water-soluble little; And can be used for the pH scope of various mineral acid systems and broad; Can also from neutrality or basic solvent, extract, thereby in precious metal extraction process extraction and separation technology, receive extensive attention.But owing to the difficult industrialness development and application that is influenced it by back extraction of this system.Therefore the research of back extraction minute amount of noble metal is the important topic that precious metal reclaims from the organic mixing solutions of quaternary ammonium salt.
Stripping process about precious metal in the organic mixing solutions of quaternary ammonium salt once had research, as extracting with acid or alkaline solution.Thiocarbamide is a kind of strong ligand, and it can form complex compound with many metals ions.Under certain condition, thiocarbamide has the ability of very strong entering inner sphere of complex, therefore is widely used in to dissolve and extraction with soaking of silver golden.
(3) summary of the invention
The present invention has studied the extraction process of thiocarbamide/hydrochloric acid/ethanolic soln to precious metal, has confirmed that concentration of hydrochloric acid is 0～1mol/L in the extraction system, and thiourea concentration is 0～2mol/L.Hydrochloric acid and ethanol volume ratio are 1: 1～10: 1
(4) embodiment
Below in conjunction with specific embodiment the present invention is described further, but protection scope of the present invention is not limited in this.
Embodiment 1:
Get 10mL thiourea solution (c=0.2mol/L), 5mL hydrochloric acid soln (c=0.5mol/L), 5mL absolute ethyl alcohol and the auriferous organic mixing solutions of 20mL in the 100mL separating funnel, vibration 15min leaves standstill, and treats to take off a layer water after the layering, and percentage extraction reaches 90%.
Embodiment 2:
Get 10mL thiourea solution (c=0.2mol/L), 5mL hydrochloric acid soln (c=0.5mol/L), 5mL absolute ethyl alcohol and the organic mixing solutions of 20mL platiniferous in the 100mL separating funnel, vibration 15min leaves standstill, and treats to take off a layer water after the layering, and percentage extraction reaches 93%.
Embodiment 3:
Get 15mL thiourea solution (c=0.2mol/L), 10mL hydrochloric acid soln (c=0.5mol/L), 5mL absolute ethyl alcohol and the auriferous organic mixing solutions of 30mL in the 250mL separating funnel, vibration 15min leaves standstill, and treats to take off a layer water after the layering, and percentage extraction reaches 94%.
Embodiment 4:
Get 10mL thiourea solution (c=0.1mol/L), 5mL hydrochloric acid soln (c=0.4mol/L), 5mL absolute ethyl alcohol and the argentiferous organic mixing solutions of 20mL in the 100mL separating funnel, vibration 15min leaves standstill, and treats to take off a layer water after the layering, and percentage extraction reaches 81%.
Embodiment 5:
Get 20mL thiourea solution (c=0.1mol/L), 15mL hydrochloric acid (c=1mol/L), 5mL absolute ethyl alcohol and the auriferous organic mixing solutions of 30mL in the 250mL separating funnel, vibration 15min leaves standstill, and treats to take off a layer water after the layering, and percentage extraction reaches 85%.
Claims (2)
1. thiocarbamide/hydrochloric acid/ethanolic soln is to the extraction process of precious metal.
2. for the described thiocarbamide/hydrochloric acid of claim 1/ethanolic soln, it is characterized by:
1) concentration of hydrochloric acid is 0～1mol/L;
2) thiourea concentration is 0～2mol/L;
3) hydrochloric acid and ethanol volume ratio are 1: 1～10: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101182249A CN102776382A (en) | 2011-05-09 | 2011-05-09 | Extraction process for precious metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101182249A CN102776382A (en) | 2011-05-09 | 2011-05-09 | Extraction process for precious metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102776382A true CN102776382A (en) | 2012-11-14 |
Family
ID=47121483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101182249A Pending CN102776382A (en) | 2011-05-09 | 2011-05-09 | Extraction process for precious metals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102776382A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104524808A (en) * | 2014-12-29 | 2015-04-22 | 东南大学 | 3-sulfoglutaramide type extraction agent and application thereof in extraction of palladium |
-
2011
- 2011-05-09 CN CN2011101182249A patent/CN102776382A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104524808A (en) * | 2014-12-29 | 2015-04-22 | 东南大学 | 3-sulfoglutaramide type extraction agent and application thereof in extraction of palladium |
| CN104524808B (en) * | 2014-12-29 | 2016-06-08 | 东南大学 | 3-sulfur glutaramide kind of extractants and the application in extraction of palladium thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Xinjiang University Document name: Notification that Application Deemed to be Withdrawn |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121114 |