CN1073214A - Wet process for purifying gold - Google Patents
Wet process for purifying gold Download PDFInfo
- Publication number
- CN1073214A CN1073214A CN92110591A CN92110591A CN1073214A CN 1073214 A CN1073214 A CN 1073214A CN 92110591 A CN92110591 A CN 92110591A CN 92110591 A CN92110591 A CN 92110591A CN 1073214 A CN1073214 A CN 1073214A
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- CN
- China
- Prior art keywords
- gold
- add
- mud
- gold mud
- water
- 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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- 239000010931 gold Substances 0.000 title claims abstract description 68
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000001704 evaporation Methods 0.000 claims abstract description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000005406 washing Methods 0.000 claims description 13
- NICDRCVJGXLKSF-UHFFFAOYSA-N nitric acid;trihydrochloride Chemical compound Cl.Cl.Cl.O[N+]([O-])=O NICDRCVJGXLKSF-UHFFFAOYSA-N 0.000 claims description 12
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 10
- 229910017604 nitric acid Inorganic materials 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- -1 this moment Substances 0.000 claims description 6
- 241000370738 Chlorion Species 0.000 claims description 5
- 229910021538 borax Inorganic materials 0.000 claims description 5
- 239000000706 filtrate Substances 0.000 claims description 5
- 239000006210 lotion Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000004328 sodium tetraborate Substances 0.000 claims description 5
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 4
- 239000012467 final product Substances 0.000 claims description 4
- 238000010926 purge Methods 0.000 claims description 4
- 238000006424 Flood reaction Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 abstract description 7
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 4
- 238000005554 pickling Methods 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- 230000002452 interceptive effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 abstract 2
- 239000003638 chemical reducing agent Substances 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 1
- 230000000873 masking effect Effects 0.000 abstract 1
- 229910000510 noble metal Inorganic materials 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 10
- 235000011167 hydrochloric acid Nutrition 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 229910021607 Silver chloride Inorganic materials 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- DDYSHSNGZNCTKB-UHFFFAOYSA-N gold(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Au+3].[Au+3] DDYSHSNGZNCTKB-UHFFFAOYSA-N 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 2
- 101710134784 Agnoprotein Proteins 0.000 description 1
- 229910021591 Copper(I) chloride Inorganic materials 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- 229910003771 Gold(I) chloride Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010946 fine silver Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- FDWREHZXQUYJFJ-UHFFFAOYSA-M gold monochloride Chemical compound [Cl-].[Au+] FDWREHZXQUYJFJ-UHFFFAOYSA-M 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- YPJKMVATUPSWOH-UHFFFAOYSA-N nitrooxidanyl Chemical compound [O][N+]([O-])=O YPJKMVATUPSWOH-UHFFFAOYSA-N 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000003352 sequestering agent Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
Images
Classifications
-
- 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)
Abstract
The invention relates to a purification of noble metal, in particular to a purification process of gold. The existing wet gold purification process adopts the method of dissolving gold in aqua regia, adding a reducing agent to reduce the gold, or adding a masking agent to complex an interfering substance and then extracting, which needs to consume a large amount of reducing agent or extracting agent and has higher cost. The invention breaks through the traditional process, adopts the simple purification processes of directly heating and evaporating the gold-containing aqua regia, combining acid pickling for impurity removal, high-temperature smelting and the like, and obtains high-quality gold. Compared with the prior art, the method has the characteristics of high product purity, low production cost, simple process and practicability.
Description
The present invention relates to a kind of precious metal and purify, specifically, is a kind of technology of wet purification gold.
At present, the technology of wet purification gold all adopts thick gold is dissolved in the chloroazotic acid, adds reductive agent again gold is restored, or add other interfering ion of sequestering agent complexing, adds the method that extraction agent extracts gold again.Chinese patent GK86106293 discloses a kind of method of extracting gold from contain golden chloroazotic acid, this method adds yellow soda ash remove nitrate radical in containing golden wang aqueous solution after, and regulates pH value, after the intensification, Reaction Separation goes out to contain the throw out of gold trioxide and gold, and the dry and said throw out of smelting obtains gold.Though the solution that extracts in this way behind the gold approaches neutrality, can reduce environmental pollution, there is following defective:
1. theoretically, at AuCl
3Add Na in the solution
2CO
3Can generate Au(OH)
3↓, but the pH value of necessary strict control solution, when basicity is superfluous, Au(OH)
3Can generate aurate (NaAuO
2) and dissolve, so the pH value of this method is crucial, there is not the people of certain analysis foundation to be difficult to grasp, therefore in practical application, be subjected to certain restriction.
2. because Au
2O
3Be intermediate oxide, the throw out that this method obtains can't carry out pickling, and other metal hydroxides coprecipitation is arranged unavoidably, causes the gained gold impure.
3. this method will be driven HNO equally
3, use Na again
2CO
3Neutralization, this method formality is longer by comparison, complex process.
There is weak point in purpose of the present invention at above-mentioned prior art exactly, and provides a kind of method simple, is easy to grasp, and cost is lower, the purifying golden process that product purity is higher.
Purpose of the present invention can realize in the following manner: thick gold is placed container, the chloroazotic acid that adds new preparation floods thick gold, heating for dissolving is 15～25 minutes then, if thick gold is not molten intact, can add the chloroazotic acid redissolve again, until dissolving fully, take off cooling, water syringe wall slightly, filter, washing with water to filter paper does not have yellow, filtrate and washing lotion merging, gained solution heating evaporation is extremely done, gold mud is promptly separated out, take off cooling after, add concentrated hydrochloric acid submergence gold mud, water purge wall of cup also repeats evaporate to dryness, to catch up with most nitric acid, take off cooling after, the hydrochloric acid soln that added 1: 1 boils washes 1～2 time, to remove copper, plumbous, zinc, iron, impurity such as silver, the hydrochloric acid that adds can flood gold mud and get final product, and this moment, solution did not have yellow substantially, filtered, washing with water does not have chlorion to gold mud and exists, gold mud is changed in another container, use 1: 1 salpeter solution to boil again and wash 1～2 time, the add-on of nitric acid also is to get final product can flood gold mud, filter, clean, oven dry is put into the magnetic crucible with gold mud, add a small amount of borax, be smelted into purified gold bullion at 1000～1100 ℃.
Compared with prior art, the present invention has following advantage:
1. product purity is higher, and through comparatively advanced at present Electron probe quantitative analysis test, Gold Content reaches 99.694%, surpasses bank's gold bar quality 99.5% of international standard, can be used for being processed into the 24K gold ornaments.
2. production cost is low, and it does not need to add any reductive agent again, but takes evaporate to dryness to separate out gold, and simple methods of purification such as impurity are removed in pickling.
3. the method simple possible is easy to grasp, and the cycle is short, and practicality is stronger.
Fig. 1 is a process flow sheet of the present invention.
The invention will be further described below in conjunction with embodiment:
Embodiment 1:
With heavily about 20.1011 gram content is that 94% thick gold places beaker, adds 40 milliliters of the chloroazotic acid of new preparation, and heating for dissolving is 15 minutes on electric furnace, take off cooling, water flushing wall of cup filters slightly, insolubles adds 30 milliliters of chloroazotic acid again, and redissolve once filters, washing with water to filter paper does not have yellow, and filtrate and washing lotion merge, and place on the electric furnace, heating evaporation is to doing, this moment gold mud separate out, take off cold after, add 10 milliliters of concentrated hydrochloric acids again, the washing wall of cup, repeat evaporate to dryness once, to catch up with most nitric acid, take off cold after, add 35 milliliters of 1: 1 hydrochloric acid, boil and wash 1 time, copper in the gold mud, plumbous, zinc, iron, impurity such as silver are respectively with CuCl
2, [PbCl
4]
2-, ZuCl
2, FeCl
3, [AgCl
2]
-Form exists in solution to separate and removes.This moment, solution should not have yellow, filtered, and washed with water to no chlorion, and gold mud is changed in another beaker, boiled with 1: 1 nitric acid and washed 1 time, and residual silver and nitric acid generate AgNO in the gold mud
3Remove.Filter, clean, the magnetic crucible is put in oven dry, adds a little borax, is smelted into purified gold bullion at 1000 ℃, gets 18.7102 gram gold, and the rate of recovery reaches 99%, and recording gold bullion purity with hydrometer method is 99.7%.
Embodiment 2:
To heavily be that 43.5243 grams contain gold 97.92% thick gold, place beaker, add 50 milliliters of new preparation chloroazotic acid, heating for dissolving is 25 minutes on electric furnace, filters, and insoluble gold bullion adds 40 milliliters of chloroazotic acid again, dissolving repeatedly until dissolving fully, is filtered, washing with water to filter paper does not have yellow, and filtrate and washing lotion merge, and are evaporated to dried on the electric furnace, see that gold mud separates out, take off cooling, add 15 milliliters of concentrated hydrochloric acids, water purge wall of cup repeats evaporate to dryness, to catch up with most nitric acid, gold mud boils for 45 milliliters with 1: 1 hydrochloric acid and washes twice, and this moment, solution was colourless, copper, plumbous, zinc, iron is removed, filter, clean no chlorion, gold mud is changed in another beaker again, boil with 1: 1 nitric acid and to wash twice, to remove remaining silver, filter, clean, oven dry, put into the magnetic crucible, add borax, be smelted into pure gold bullion at 1100 ℃.Heavily be 42.193 grams, the rate of recovery is 99%.Record gold bullion purity 99.8% with hydrometer method.
Embodiment 3:
Restrain the thick gold mud that obtains with cyanide process with 107, place 3 200 ml beakers respectively, add 40 milliliters of new preparation chloroazotic acid respectively, heating for dissolving 20 minutes is filtered, and insolubles adds 40 milliliters of chloroazotic acid again, redissolve once, filter, washing does not have yellow to filter paper (AgCl on the filter paper ↓ precipitation collection uses Na
2CO
3Obtain fine silver 900 ℃ of meltings), filtrate and washing lotion merge, and place on the electric furnace, heating evaporation is to doing, and sees that promptly gold mud separates out, and takes off cooling, add 10 milliliters of hydrochloric acid again, water purge wall of cup repeats evaporate to dryness once, catching up with most nitric acid, the gained gold mud boils for 40 milliliters with 1: 1 hydrochloric acid and to wash twice, this moment, solution did not have yellow, filter and clean chlorion, change in another beaker, boil with 1: 1 nitric acid and wash twice, filter, clean, the magnetic crucible is put in oven dry, add borax, be smelted into pure gold bullion at 1050 ℃, obtain 98 gram proof gold, it is 99.76% that hydrometer method records gold bullion purity.
Claims (1)
1, a kind of wet method purifying golden process, it is that thick gold is placed container, the chloroazotic acid that adds new preparation floods thick gold, heating for dissolving is 15～25 minutes then, if thick gold is not molten intact, can add the chloroazotic acid redissolve again, until dissolving fully, take off cooling, slightly the water syringe wall, filter, washing with water to filter paper does not have yellow, filtrate and washing lotion merging, it is characterized in that: gained solution heating evaporation is extremely done, gold mud is promptly separated out, take off cooling after, add concentrated hydrochloric acid submergence gold mud, water purge wall of cup also repeats evaporate to dryness, after taking off cooling, the hydrochloric acid soln that added 1: 1 boils washes 1～2 time, and the hydrochloric acid of adding can flood gold mud and get final product, this moment, solution did not have yellow substantially, filter, washing with water does not have chlorion to gold mud and exists, and gold mud is changed in another container, use 1: 1 salpeter solution to boil again and wash 1～2 time, the add-on of nitric acid also is to get final product can flood gold mud, filters, and cleans, oven dry, gold mud is put into the magnetic crucible, add a small amount of borax, be smelted into purified gold bullion at 1000～1100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92110591A CN1073214A (en) | 1992-09-10 | 1992-09-10 | Wet process for purifying gold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92110591A CN1073214A (en) | 1992-09-10 | 1992-09-10 | Wet process for purifying gold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1073214A true CN1073214A (en) | 1993-06-16 |
Family
ID=4944894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92110591A Pending CN1073214A (en) | 1992-09-10 | 1992-09-10 | Wet process for purifying gold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1073214A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1094984C (en) * | 1999-08-13 | 2002-11-27 | 龙口市金裕黄金有限公司 | Process for extracting gold and silver by removing impurities with acid and alkali |
| CN101618457B (en) * | 2008-07-02 | 2011-07-20 | 深圳市众恒隆实业有限公司 | Method for recovering low-content noble metal from jewelry processing polishing powder |
| CN110172585A (en) * | 2019-04-29 | 2019-08-27 | 北京理工大学 | A method of extracting golden simple substance from gold-containing scrap |
| CN110552007A (en) * | 2019-10-22 | 2019-12-10 | 贵州大学 | Efficient and environment-friendly method for deplating and extracting gold elements |
| CN111024916A (en) * | 2019-11-29 | 2020-04-17 | 上海仪电科学仪器股份有限公司 | Gold, and purification method and application thereof |
| CN113777217A (en) * | 2021-09-10 | 2021-12-10 | 云南铜业股份有限公司西南铜业分公司 | Method for measuring selenium content in silver-containing material |
| CN115710641A (en) * | 2022-12-02 | 2023-02-24 | 成都泰美克晶体技术有限公司 | Method for recovering noble metal gold in gold film wet etching liquid |
-
1992
- 1992-09-10 CN CN92110591A patent/CN1073214A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1094984C (en) * | 1999-08-13 | 2002-11-27 | 龙口市金裕黄金有限公司 | Process for extracting gold and silver by removing impurities with acid and alkali |
| CN101618457B (en) * | 2008-07-02 | 2011-07-20 | 深圳市众恒隆实业有限公司 | Method for recovering low-content noble metal from jewelry processing polishing powder |
| CN110172585A (en) * | 2019-04-29 | 2019-08-27 | 北京理工大学 | A method of extracting golden simple substance from gold-containing scrap |
| CN110552007A (en) * | 2019-10-22 | 2019-12-10 | 贵州大学 | Efficient and environment-friendly method for deplating and extracting gold elements |
| CN111024916A (en) * | 2019-11-29 | 2020-04-17 | 上海仪电科学仪器股份有限公司 | Gold, and purification method and application thereof |
| CN113777217A (en) * | 2021-09-10 | 2021-12-10 | 云南铜业股份有限公司西南铜业分公司 | Method for measuring selenium content in silver-containing material |
| CN115710641A (en) * | 2022-12-02 | 2023-02-24 | 成都泰美克晶体技术有限公司 | Method for recovering noble metal gold in gold film wet etching liquid |
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|---|---|---|---|
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |