CN1087786C - Cyclic carbamate noble metal extractant - Google Patents
Cyclic carbamate noble metal extractant Download PDFInfo
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- CN1087786C CN1087786C CN97115115A CN97115115A CN1087786C CN 1087786 C CN1087786 C CN 1087786C CN 97115115 A CN97115115 A CN 97115115A CN 97115115 A CN97115115 A CN 97115115A CN 1087786 C CN1087786 C CN 1087786C
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- extraction agent
- extraction
- cyclic carbamates
- cyclic
- precious metal
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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 double-substituted cyclic carbonate noble metal extractant of the patent divides a substituent into two parts, respectively substitutes at two sides of a ring, and controls R1+R2To reduce steric hindrance when the R group is too large to form a pentacylium salt and associate these pentacylium salt homoanions with each other. The extraction performance of the extractants is obviously improved under the condition of keeping the extractants to have enough hydrophobicity (without using a diluent).
Description
Cyclic carbamate among the present invention is the new noble metal extractant of a class, they can extract under the situation without thinner, and in high acidity, realize Au, Pt, Pd under the situation of high ion concentration ... Deng precious metal ion with multiple base-metal ion (Cu, Ni, Co, Mg ...) between, the extracting and separating of globality.
In precious metal refining process in the past, realize precious metal (Au, Pt, Pd ...) same base metal (Cu, Ni, Co, Mg ...) separation often want chemical method to add multiple extraction process, in the extraction process often a kind of extraction agent also an extracting and separating go out a kind of, the interference of base metal exists always, treatment capacity is big, the numerous rope of treatment process, technology cost costliness.New extraction agent if can be arranged, can be with Au, Pt, Pd ... with base metal earlier separately, extract also enrichment Au, Pt, Pd earlier ..., concentrate again Au, Pt, Pd are separated, then treatment capacity diminishes, and treatment process is simplified, and the impurity content of precious metal also descends significantly.
In addition, in precious metal hydrometallurgy, it is very active to seek the research work that substitutes the prussiate leaching, leaches as muriate, and thiocarbamide leaches ...New leaching system also must have the novel extraction agent that is complementary with it to occur.The needs of these new leaching systems of cyclic carbamate positive adaptation.
Purpose of the present invention: invent a kind of new noble metal extractant.They are cyclic carbamates, they can be with precious metal (Au, Pt, Pd in strong acid media ...) with numerous base metals (Cu, Ni, Co, Mg ...) one or several times simple extraction sepn process in realize that precious metal separates with the globality between base metal, thereby simplify hydrometallurgy (precious metal) technology; And be new leaching system (leaching as muriate), supporting new extractant is provided.
Cyclic carbamate among the present invention has fine hydrophobicity and flowability, and the function of thinner is arranged itself, can be without thinner, they can be at PH=1, and muriate leaches in the feed liquid, under the high ion concentration condition, comparing 1: 1, during separating, realizes the single extraction that extracted three minutes from Cu
2+, Co
2+, Ni
2+, Mg
2+With 100%, 100%, 98.5% percentage extraction, extract Au, Pt, Pd in many base-metal ion, realize the overall separation between expensive, base metal.The consumption of described extraction agent be by collection liquid long-pending 5%～1000%, wherein 50%～200% more often use, described extraction agent can make extractant regeneration with reductive agent or electrolytic process back extraction precious metal.
Cyclic carbamate among the present invention share with cyclic carbonate, and selectivity can further improve.
When the feed liquid ionic concn strengthened, cyclic carbamates and they showed that with all not considerable changes of its extraction ability of suitable assembly of other noble metal extractant this kind of extractants has bigger saturated capacity.Representative of the present invention:
R
1Be 1 to 20 arbitrary alkyl or H in the carbon; R
2, R
3Be 1 to 20 arbitrary alkyl or H in the carbon.
Representative with reference to patent US 5348712
Embodiment 1
The extraction ability contrast is implemented
The chloroazotic acid that the minimal amounts of dissolved gold is arranged in the feed liquid, the muriate of hydrochloric acid and Pt, Pd leaches feed liquid, PH=1, and each concentration of metal ions is 800ppm in the feed liquid, compare 1: 1, do not add thinner, on vibrator the vibration 3 minutes, leave standstill 1 minute after, phase-splitting, tell water after the phase-splitting, measure various ionic concns in the raffinate with the ICP analysis of emission spectrography, the difference of concentration is the extraction quantity in the organic phase before this value and the extraction.
Extraction results:
Percent extraction (%) Au
3+Pt
4+Pd
2+Cu
2+Ni
2+Co
2+Mg
2+
1# 100 100 98.5 10 4 0.1 0.8
3# 99 0.1 2 0.1 0.1 0.1 0.8
1# is to Au
3+, Pt
4+, Pd
2+Several precious metals all have good extraction power, and the extraction power to Au also is far longer than the 3# representative that contrasts in the patent separately.
Embodiment 2
The 1# extraction agent with
Mix assembly.
Other operation, test with embodiment 1 result of implementation:
Au
3+ Pt
4+ Pd
2+ Cu
2+ Ni
2+ Co
2+?Mg
2+
Percent extraction (%) 100 100 99 0000
After the assembly on cyclic carbamate basis, selectivity further improves, and is more suitable in the sharp separation of the globality between expensive, base metal.
Embodiment 3
Au
3+Feed concentration change to 3000ppm from 200ppm always, other is operated with embodiment 1.
Experimental result: with Au in the feed liquid
3+Concentration continue to increase, 3# is to Au
3+Percentage extraction drop to 96.8% from 99%.
And 1#; 2#+1#; The extraction agent of 80%1#+20% mibk (or dialkyl sulfide, etc.), to Au
3+Percentage extraction remain on 100% always.
Embodiment 4
Add FeSO in the extraction liquid of embodiment 1
4Aqueous solution vibration 1 minute, phase-splitting, the water place golden yellow metal level of appearance on glass, organic phase partly is white by xanthochromia, extraction agent is reproduced.
Claims (11)
1. cyclic carbamates extraction agent, they can have or the diluent free situation under from acidic aqueous solution multiple precious metal ion of extracting and separating or complex compound, extraction liquid can make extractant regeneration with reductive agent or electrolytic process back extraction precious metal.
2. cyclic carbamates extraction agent according to claim 1 is characterized in that described cyclic carbamate is a five-ring, and precursor structure is as follows:
R
1Be 1 to 20 arbitrary alkyl or H in the carbon;
R
2, R
3Be 1 to 20 arbitrary alkyl or H in the carbon.
3. noble metal extractant that forms by assembly between the cyclic carbamates extraction agent of claim 1.
4. noble metal extractant that forms by assembly between the cyclic carbamates extraction agent of claim 1 and other noble metal extractant.
5. noble metal extractant that forms with assembly between the cyclic carbonate by the cyclic carbamates extraction agent of claim 1.
6. cyclic carbamates extraction agent according to claim 1 is characterized in that described extraction agent can be at hydrochloric acid, chloroazotic acid, nitric acid, sulfuric acid, in the muriate leach liquor and at hydrochloric acid, chloroazotic acid, nitric acid, sulfuric acid extracts precious metal ion in the various nitration mixture between the muriate leach liquor.
7. cyclic carbamates extraction agent according to claim 1, it is characterized in that described extraction agent can the extracting and separating feed liquid in the precious metal one or more.
8. cyclic carbamates extraction agent according to claim 1 is characterized in that described extraction agent extracting and separating precious metal from base metal.
9. cyclic carbamates extraction agent according to claim 1, the consumption that it is characterized in that described extraction agent for by collection liquid long-pending 5%～1000%.
10. cyclic carbamates extraction agent according to claim 1, the consumption that it is characterized in that described extraction agent for by collection liquid long-pending 50～200%.
11. cyclic carbamates extraction agent according to claim 1 is characterized in that extraction liquid can be with reductive agent or electrolytic process back extraction precious metal, the extraction agent of regenerating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97115115A CN1087786C (en) | 1997-07-23 | 1997-07-23 | Cyclic carbamate noble metal extractant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97115115A CN1087786C (en) | 1997-07-23 | 1997-07-23 | Cyclic carbamate noble metal extractant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1206048A CN1206048A (en) | 1999-01-27 |
| CN1087786C true CN1087786C (en) | 2002-07-17 |
Family
ID=5173134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97115115A Expired - Fee Related CN1087786C (en) | 1997-07-23 | 1997-07-23 | Cyclic carbamate noble metal extractant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1087786C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103509947A (en) * | 2012-06-18 | 2014-01-15 | 独立行政法人日本原子力研究开发机构 | Solvent extraction separation method for extracting and separating precious metal from hydrochloric acid solution |
| CN106187932B (en) * | 2016-07-27 | 2020-07-14 | 红河学院 | Method for extracting and separating palladium from multi-metal ion mixed solution by using 2- (2-methoxyethylsulfinyl) benzoxazole |
| CN106316980B (en) * | 2016-07-27 | 2021-02-05 | 红河学院 | 2- (sulfo-2-methoxyethyl) benzothiazole and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4525199A (en) * | 1981-05-04 | 1985-06-25 | Nelson Research & Development Co. | Method of improved pest control |
| US4638026A (en) * | 1983-10-19 | 1987-01-20 | Vulnax International Limited | Ozone-stabilized rubbery elastomers |
| US4840663A (en) * | 1986-10-22 | 1989-06-20 | Ciba-Geigy Corporation | Synergistic composition and method for selective weed control in rice |
| US5156666A (en) * | 1989-12-11 | 1992-10-20 | Isp Investments Inc. | Delivery system for agricultural chemicals |
-
1997
- 1997-07-23 CN CN97115115A patent/CN1087786C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4525199A (en) * | 1981-05-04 | 1985-06-25 | Nelson Research & Development Co. | Method of improved pest control |
| US4638026A (en) * | 1983-10-19 | 1987-01-20 | Vulnax International Limited | Ozone-stabilized rubbery elastomers |
| US4840663A (en) * | 1986-10-22 | 1989-06-20 | Ciba-Geigy Corporation | Synergistic composition and method for selective weed control in rice |
| US5156666A (en) * | 1989-12-11 | 1992-10-20 | Isp Investments Inc. | Delivery system for agricultural chemicals |
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| Publication number | Publication date |
|---|---|
| CN1206048A (en) | 1999-01-27 |
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