CN115323381A - Shiny silverweed herb agent and preparation method thereof - Google Patents
Shiny silverweed herb agent and preparation method thereof Download PDFInfo
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- CN115323381A CN115323381A CN202211133607.8A CN202211133607A CN115323381A CN 115323381 A CN115323381 A CN 115323381A CN 202211133607 A CN202211133607 A CN 202211133607A CN 115323381 A CN115323381 A CN 115323381A
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- shiny
- silver
- thiosulfate
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
- C23F3/04—Heavy metals
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
<xnotran> , . </xnotran> The medicament comprises the following medicament components in parts by weight: 5-10 parts of ammonium thiosulfate, 3-7 parts of copper sulfate, 1-2 parts of sodium metabisulfite, 3-6 parts of a reducing agent and 200-400 parts of water, and the components of the medicament are stirred in proportion until being dissolved. The advantages are that: <xnotran> , , , , , , , , , , , . </xnotran>
Description
Technical Field
The invention relates to the technical field of pure silver product treatment, in particular to a shiny silver element and a preparation method thereof.
Background
Silver has attractive white luster, higher chemical stability and collection and appreciation value, is deeply favored by people, and is widely used as jewelry, ornaments, silverware, tableware, worship gifts, medals and commemorative coins. Among them, silver jewelry has a wide market in developing countries, and silver tableware is popular with families; the silver commemorative coin is exquisite in design, small in issuing amount, has the value-keeping and value-increasing functions and is deeply affected by coin collectors and coin investors.
With the improvement of the living standard of people and the rise of the collection heat, silverware has become increasingly popular. However, for silverware such as silver coins (medals) and silver ornaments exposed in the air for a long time, black or yellow spots are easily generated on the surface of the silverware, and gradually cover the whole surface of the silverware, so that the aesthetic property and the ornamental property of the silverware are influenced, and the collection value of the silverware is greatly reduced.
The main component of black or yellow spots on the surface of the silverware is silver sulfide, and simultaneously contains a small amount of components such as silver chloride, silver oxide and the like, and the appearance performance and the light reflecting performance of the product are influenced by the color change of the silverware, so the desulfation of the silverware and the silvered product is a problem which is in urgent need of solving industrial silverware and has practical significance.
In recent years, a lot of shiny silver ware surfaces are researched at home and abroad, however, the shiny again contains toxic substances such as cyanide and the like, therefore, nowadays, the cyanogen-free shiny solder paste is a hotspot for research in the field of removing corrosive discoloration of silverware.
Disclosure of Invention
<xnotran> , , . </xnotran>
The technical scheme adopted by the invention is that the medicament comprises the following medicament components in parts by weight: 5-10 parts of ammonium thiosulfate, 3-7 parts of copper sulfate, 1-2 parts of sodium metabisulfite, 3-6 parts of a reducing agent and 200-400 parts of water.
The ammonium thiosulfate used in the invention can be thiosulfate.
The invention adopts sodium thiosulfate.
The copper sulfate is copper sulfate pentahydrate.
The thiosulfate ions generated by the invention are combined with copper ions to generate a thiosulfate homocomplex.
The thiosulfuric acid homocomplex CuS generated by the invention 2 O 3- 、Cu(S 2 O 3 ) 2 3- And Cu (S) 2 O 3 ) 3 5- Ions with Ag 2 S reaction to produce AgS 2 O 3- 、2Ag(S 2 O 3 ) 3- And Ag (S) 2 O 3 ) 3 5- Ions.
The decomposition of the sodium metabisulfite of the invention generates an oxidation medium, and the concentration of thiosulfate ions is increased.
The reducing agent is ethylenediamine tetraacetic acid.
The water is deionized water.
A preparation method of shiny honeysuckle flower agent comprises the steps of stirring the medicament components in proportion until the medicament components are dissolved, stirring time is 5-10min, and stirring speed is 400-600rpm.
The invention firstly decomposes copper sulfate and ammonium thiosulfate by a chemical corrosion method, and then forms a copper thiosulfate complex (namely CuS) by generated ions 2 O 3 - 、Cu(S 2 O 3 ) 2 3- 、Cu(S 2 O 3 ) 2 5- ). Thus, the initial copper ions are reduced during the reaction with thiosulfate ions. The silver sulfide then reacts with the copper thiosulfate to form a product of silver thiosulfate and cuprous sulfide. By the decomposition of sodium metabisulphite, an oxidation medium is produced. The resulting thiosulfate ions can be enhanced. Ag + And Cu 2+ The thiosulfate can be attracted and some other anions are formed. Thus, the decomposition of thiosulfate or metabisulfite can result in more silver attraction and higher efficiency.
The invention has the advantages that: <xnotran> , , , , , , , , , , , . </xnotran>
Detailed Description
Example 1
Taking 5g of ammonium thiosulfate, 3g of copper sulfate, 1g of sodium metabisulfite, 3g of ethylene diamine tetraacetic acid and 200g of water, and stirring the components of the taken medicine according to a proportion until the components are dissolved for 5min, wherein the stirring speed is 400rpm.
Taking a silver bracelet exposed in air for a long time as a sample, taking a little of obtained medicament, uniformly coating the medicament on a color spot by using a soft cloth and slightly wiping the color spot, completely removing the color spot within about 5 minutes, and leading the silver bracelet to be bright as new and have no scratch or corrosive trace on the surface.
Example 2
Taking 7.5g of ammonium thiosulfate, 5g of copper sulfate, 1.5g of sodium metabisulfite, 4.5g of ethylene diamine tetraacetic acid and 300g of deionized water, and stirring the components of the taken medicine according to a proportion until the components are dissolved, wherein the stirring time is 7.5min, and the stirring speed is 500rpm.
A small amount of the obtained medicament is taken as a sample of a silver bowl which is used for a long time and exposed in the air, the silver bowl is uniformly smeared on a color spot by using soft cloth and is lightly wiped, the color spot is completely removed within about 5 minutes, the silver bowl is bright as new, and the surface of the silver bowl is free from any scratch and corrosive trace.
Example 3
Taking 10g of ammonium thiosulfate, 7g of copper sulfate, 2g of sodium metabisulfite, 6g of ethylene diamine tetraacetic acid and 400g of deionized water, and stirring the components of the taken medicine according to a proportion until the components are dissolved for 10min at the stirring speed of 600rpm.
Taking silver coins exposed in the air for a long time as a sample, taking a little of obtained medicament, uniformly coating the medicament on color spots by using soft cloth and lightly wiping the color spots, completely removing the color spots within about 5 minutes, wherein the silver coins are bright as new, and the surfaces of the silver coins are free from any scratches and corrosive marks.
Example 4
Taking 7.5g of sodium thiosulfate, 5g of blue vitriod, 1.5g of sodium metabisulfite, 4.5g of ethylene diamine tetraacetic acid and 300g of deionized water, stirring the components of the medicine according to a proportion until the components are dissolved, wherein the stirring time is 7.5min, and the stirring speed is 500rpm.
Decomposition of thiosulfate ion, na 2 S 2 O 3 →2Na + +S 2 O 3 2- Decomposition of copper sulfate, cuSO 4 →Cu 2+ +SO 4 2- And combining the generated thiosulfate ions with copper ions to generate a thiosulfate homocomplex, which is as follows: 2Cu 2+ +4S 2 O 3 2- →2CuS 2 O 3- +S 4 O 6 2- And 2Cu 2+ +6S 2 O 3 2- →2Cu(S 2 O 3 ) 2 3- +S 4 O 6 2- And 2Cu 2+ +8S 2 O 3 2- →2Cu(S 2 O 3 ) 3 5- +S 4 O 6 2- Generated CuS 2 O 3- 、Cu(S 2 O 3 ) 2 3- And Cu (S) 2 O 3 ) 3 5- Ions with Ag 2 S reaction to produce AgS 2 O 3- 、2Ag(S 2 O 3 ) 3- And Ag (S) 2 O 3 ) 3 5- Ions to remove silver sulfide, the reaction of sodium metabisulfite is Na 2 S 2 O 5 +H 2 O→2Na + +2HSO 3- ，2HSO 3- →S 2 O 5 2- +H 2 O，S 2 O 5 2- →O 2 +S 2 O 3 2- The decomposition of sodium metabisulfite, the generation of an oxidation medium, the increase of the concentration of thiosulfate ions can improve the extraction efficiency of silver, and the reaction is accelerated by using ethylene diamine tetraacetic acid as a reducing agent.
Claims (10)
1. A shiny silverware, which is characterized in that: the medicament comprises the following medicament components in parts by weight: 5-10 parts of ammonium thiosulfate, 3-7 parts of copper sulfate, 1-2 parts of sodium metabisulfite, 3-6 parts of a reducing agent and 200-400 parts of water.
2. The shiny silver shiny again agent of claim 1, wherein: the ammonium thiosulfate can be thiosulfate.
3. The shiny silver shiny solder paste as claimed in claim 2, wherein: sodium thiosulfate is used.
4. The shiny silver shiny solder paste as claimed in claim 1, wherein: the copper sulfate is copper sulfate pentahydrate.
5. The shiny silver shiny again agent of claim 1, wherein: the generated thiosulfate ions are combined with copper ions to generate a thiosulfate homocomplex.
6. The shiny silver shiny solder paste as claimed in claim 5, wherein: the generated thiosulfuric acid homocomplex CuS 2 O 3- 、Cu(S 2 O 3 ) 2 3- And Cu (S) 2 O 3 ) 3 5- Ions with Ag 2 S reaction to produce AgS 2 O 3- 、2Ag(S 2 O 3 ) 3- And Ag (S) 2 O 3 ) 3 5- Ions.
7. The shiny silver shiny again agent of claim 1, wherein: the decomposition of sodium metabisulfite, the generation of oxidation medium, increase of thiosulfate ion concentration.
8. The shiny silver shiny again agent of claim 1, wherein: the reducing agent is ethylenediamine tetraacetic acid.
9. The shiny silver shiny again agent of claim 1, wherein: the water is deionized water.
10. The method for preparing the shiny silver shiny again agent, according to claim 1, wherein the method comprises the following steps: the medicament components are stirred according to the proportion until being dissolved, the stirring time is 5-10min, and the stirring speed is 400-600rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211133607.8A CN115323381A (en) | 2022-09-18 | 2022-09-18 | Shiny silverweed herb agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211133607.8A CN115323381A (en) | 2022-09-18 | 2022-09-18 | Shiny silverweed herb agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115323381A true CN115323381A (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211133607.8A Pending CN115323381A (en) | 2022-09-18 | 2022-09-18 | Shiny silverweed herb agent and preparation method thereof |
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| CN (1) | CN115323381A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2745806A1 (en) * | 2000-05-19 | 2001-11-22 | Jinxing Ji | Method for thiosulfate leaching of precious metal-containing materials |
| CN101497940A (en) * | 2009-03-12 | 2009-08-05 | 昆明理工大学 | Process for leaching silver from ore by ammonia-free thiosulfate solution |
| CN103233236A (en) * | 2013-04-17 | 2013-08-07 | 上海珀理玫化学科技有限公司 | Agent and method used for removing black or yellow spots on silverware surface |
| CN104514020A (en) * | 2013-09-27 | 2015-04-15 | 无锡华冶钢铁有限公司 | Thiosulfate silvering plating solution |
-
2022
- 2022-09-18 CN CN202211133607.8A patent/CN115323381A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2745806A1 (en) * | 2000-05-19 | 2001-11-22 | Jinxing Ji | Method for thiosulfate leaching of precious metal-containing materials |
| CN101497940A (en) * | 2009-03-12 | 2009-08-05 | 昆明理工大学 | Process for leaching silver from ore by ammonia-free thiosulfate solution |
| CN103233236A (en) * | 2013-04-17 | 2013-08-07 | 上海珀理玫化学科技有限公司 | Agent and method used for removing black or yellow spots on silverware surface |
| CN104514020A (en) * | 2013-09-27 | 2015-04-15 | 无锡华冶钢铁有限公司 | Thiosulfate silvering plating solution |
Non-Patent Citations (2)
| Title |
|---|
| D. FENG: "Thiosulphate leaching of gold in the presence of ethylenediaminetetraacetic acid (EDTA)", 《MINERALS ENGINEERING》, vol. 23, no. 2, pages 143 - 150, XP026822639 * |
| SEYED HADI BANIJAMALI: "Leaching behavior of silver sulfide in the sodium thiosulfate-copper sulfate- sodium metabisulfite system", 《MINERALS ENGINEERING》, vol. 174, pages 1 - 11 * |
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