CN115108579B - Preparation method of gold sulfite solution - Google Patents
Preparation method of gold sulfite solution Download PDFInfo
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- CN115108579B CN115108579B CN202210923305.4A CN202210923305A CN115108579B CN 115108579 B CN115108579 B CN 115108579B CN 202210923305 A CN202210923305 A CN 202210923305A CN 115108579 B CN115108579 B CN 115108579B
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- gold
- sulfite
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- sulfite solution
- hydroxide
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- SRCZENKQCOSNAI-UHFFFAOYSA-H gold(3+);trisulfite Chemical compound [Au+3].[Au+3].[O-]S([O-])=O.[O-]S([O-])=O.[O-]S([O-])=O SRCZENKQCOSNAI-UHFFFAOYSA-H 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 229910021505 gold(III) hydroxide Inorganic materials 0.000 claims abstract description 50
- WDZVNNYQBQRJRX-UHFFFAOYSA-K gold(iii) hydroxide Chemical compound O[Au](O)O WDZVNNYQBQRJRX-UHFFFAOYSA-K 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 31
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims abstract description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 38
- 239000003792 electrolyte Substances 0.000 claims description 33
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 32
- 229910052737 gold Inorganic materials 0.000 claims description 30
- 239000010931 gold Substances 0.000 claims description 30
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 29
- 238000001914 filtration Methods 0.000 claims description 26
- 238000005868 electrolysis reaction Methods 0.000 claims description 17
- 235000010265 sodium sulphite Nutrition 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000001556 precipitation Methods 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- BHZRJJOHZFYXTO-UHFFFAOYSA-L potassium sulfite Chemical compound [K+].[K+].[O-]S([O-])=O BHZRJJOHZFYXTO-UHFFFAOYSA-L 0.000 claims description 4
- 235000019252 potassium sulphite Nutrition 0.000 claims description 4
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 claims description 2
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 2
- DJEHXEMURTVAOE-UHFFFAOYSA-M potassium bisulfite Chemical compound [K+].OS([O-])=O DJEHXEMURTVAOE-UHFFFAOYSA-M 0.000 claims description 2
- 229940099427 potassium bisulfite Drugs 0.000 claims description 2
- 235000010259 potassium hydrogen sulphite Nutrition 0.000 claims description 2
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 7
- 239000013067 intermediate product Substances 0.000 abstract description 3
- 238000010668 complexation reaction Methods 0.000 abstract 1
- 238000007747 plating Methods 0.000 description 12
- 230000000536 complexating effect Effects 0.000 description 6
- 238000009713 electroplating Methods 0.000 description 6
- ZWZLRIBPAZENFK-UHFFFAOYSA-J sodium;gold(3+);disulfite Chemical compound [Na+].[Au+3].[O-]S([O-])=O.[O-]S([O-])=O ZWZLRIBPAZENFK-UHFFFAOYSA-J 0.000 description 6
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002344 gold compounds Chemical class 0.000 description 1
- MXZVHYUSLJAVOE-UHFFFAOYSA-N gold(3+);tricyanide Chemical compound [Au+3].N#[C-].N#[C-].N#[C-] MXZVHYUSLJAVOE-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- KRZKNIQKJHKHPL-UHFFFAOYSA-J tripotassium;gold(1+);disulfite Chemical compound [K+].[K+].[K+].[Au+].[O-]S([O-])=O.[O-]S([O-])=O KRZKNIQKJHKHPL-UHFFFAOYSA-J 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G7/00—Compounds of gold
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/50—Processes
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention discloses a preparation method of gold sulfite solution, which utilizes an electrolytic method to prepare intermediate product gold hydroxide, and the intermediate product is filtered and then is subjected to complexation reaction with sulfite to prepare the gold sulfite solution, so that chloride ions are avoided in the whole process, and the process flow is greatly shortened.
Description
Technical Field
The invention relates to a preparation method of a gold compound in the electroplating industry, in particular to a preparation method of a gold sulfite solution.
Background
The electro-gold plating is divided into cyanide-containing gold plating and cyanide-free gold plating according to the process characteristics. Cyanide gold plating is currently used industrially stably, but cyanide in the electroplating solution is a highly toxic substance, and free cyanide in microelectronic fabrication attacks the photoresist. Along with the increasing requirements of industry on the components and environmental protection of gold plating solutions, cyanide-free electroplating has become a development trend. The gold sulfite solution is an ideal reagent for replacing cyanide-containing gold plating solution, is industrially applied to meet the gold plating requirement of components in the electronic communication industry, and is applied to gold plating on the surfaces of copper, nickel, silver and other substrates; can also be matched with electroplating solutions of other elements to be applied to different alloy plating layers of jewelry and ornaments. The gold sulfite electroplating system has good dispersing capability and covering capability, high current efficiency, high deposition speed, fine and bright plating layer, less pores and good binding force between the plating layer and metals such as nickel, copper, silver and the like.
In the main preparation method of gold sulfite, a hydrochloric acid and nitric acid system is often used for dissolving gold, and a large amount of chloride ions are accompanied in the system, so that the subsequent production and the use of electroplating process equipment are negatively influenced. The Chinese patent application CN101734708A discloses a preparation method of sodium gold sulfite for cyanide-free gold plating, which comprises the following specific steps: dissolving gold in aqua regia to prepare chloroauric acid, regulating alkali for neutralization, adding sodium sulfite, filtering and concentrating to obtain precipitate, drying and crushing the precipitate to obtain the product. The method has no solid-liquid separation in the precipitation process, and a large amount of chlorides are contained in the product. Chinese patent application CN114164465A adopts aqua regia to dissolve gold, ammonia to regulate alkali, gold ralate precipitation, washing chloridion and sodium sulfite to complex. Although the technology can reduce chloride ions through washing, lei Jinsuan precipitation, adsorption and entrained chloride ions still cannot be completely removed, and gold-rapate is easy to explode, so that potential safety hazards are generated in the production and manufacturing process.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a preparation method of gold sulfite solution, which is characterized in that an intermediate product gold hydroxide is prepared by an electrolytic method, and the gold sulfite solution is prepared by complexing reaction with sulfite after filtration, so that chloride ions are not generated in the whole process, and the process flow is greatly shortened.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a preparation method of a gold sulfite solution comprises the following steps:
s1, electrolyzing high-purity gold serving as an anode, an inert electrode serving as a cathode and sulfuric acid serving as electrolyte, and controlling current density to generate a gold hydroxide film at the anode; under the action of oxygen precipitation and compression force, gold hydroxide can be automatically stripped and fallen into electrolyte;
s2, filtering the electrolyte after the electrolysis in the step S1 to obtain gold hydroxide, and slowly adding the gold hydroxide into a sulfite solution; the adding process adopts a plurality of small-amount adding, when the adding is carried out initially, the solution is light yellow, and after the solution becomes colorless and transparent, the gold hydroxide is continuously added until the gold hydroxide is added completely; controlling the pH value of the solution during the adding period; finally filtering to obtain the gold sulfite solution.
Further, in the step S1, the concentration of sulfuric acid is 0.05-0.2mol/L.
Further, in step S1, the temperature of electrolysis is 20-50 ℃.
Further, in step S1, the current density of the electrolysis is 10-500mA/cm 2 。
Further, in step S2, the sulfite is one of ammonium sulfite, sodium sulfite, potassium sulfite, sodium bisulfite, and potassium bisulfite.
Further, in step S2, the sulfite solution is prepared as gold: sulfite molar ratio = 1:3-1:6.
Further, in step S2, the pH is controlled to be 6.0-10.0 during the addition process.
The invention has the beneficial effects that:
(1) The method does not adopt aqua regia or chloridized gold dissolving, the aqua regia gold dissolving process needs long time and high energy consumption for nitrate removal, and a great amount of nitrogen oxides are generated in the nitrate removal process. The gold hydroxide is prepared through electrolysis, so that the influence of chloride ions can be removed from the source, and the equipment corrosion is reduced.
(2) The method of the invention has the advantages of no need of cleaning impurities such as chloride ions and the like, and low water consumption.
(3) The method has the advantages of short flow, convenient operation, simple process, improved production efficiency, reduced energy consumption, environmental friendliness and easy realization.
Drawings
FIG. 1 is a schematic flow chart of the method of examples 1-5 of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that, while the present embodiment provides a detailed implementation and a specific operation process on the premise of the present technical solution, the protection scope of the present invention is not limited to the present embodiment.
Example 1
The embodiment provides a preparation method of a gold sulfite solution, which takes sulfuric acid as electrolyte, generates a gold hydroxide film through electrolysis, and is subjected to complexing with sodium sulfite after filtration and filtration to obtain the gold sodium sulfite solution, as shown in fig. 1, and the specific process steps comprise:
s1, high-purity gold (more than or equal to 99.999%) is used as an anode, a stainless steel electrode is used as a cathode, sulfuric acid with the concentration of 0.05mol/L is used as electrolyte, the temperature of the electrolyte is controlled to be 20 ℃, and 10mA/cm is set 2 And (3) generating a gold hydroxide film on the gold anode by current density. Under the action of oxygen precipitation and compression force, gold hydroxide is automatically stripped and falls into electrolyte;
s2, filtering the electrolyte obtained after the electrolysis in the step S1 to obtain gold hydroxide, and slowly adding the gold hydroxide into the electrolyte according to the following steps: sodium sulfite molar ratio = 1:6 in sodium sulfite solution formulated. In the process, a small amount of addition is adopted for multiple times, when the addition is carried out initially, the solution is pale yellow, and after the solution becomes colorless and transparent, the gold hydroxide is continuously added until the addition of the gold hydroxide is complete. During which the pH of the solution was controlled to 9.0 with sulfuric acid. Filtering the solution to obtain gold sulfite solution.
Example 2
The embodiment provides a preparation method of a gold sulfite solution, which takes sulfuric acid as electrolyte, generates a gold hydroxide film through electrolysis, and is subjected to complexing with sodium sulfite after filtration and filtration to obtain the gold sodium sulfite solution, as shown in fig. 1, and the specific process steps comprise:
s1, high-purity gold (more than or equal to 99.999%) is used as an anode, a stainless steel electrode is used as a cathode, sulfuric acid with the concentration of 0.2mol/L is used as electrolyte, the temperature of the solution is controlled to be 50 ℃, and 500mA/cm is set 2 And (3) generating a gold hydroxide film on the gold anode by current density. Under the action of oxygen precipitation and compression force, gold hydroxide is automatically stripped and falls into electrolyte;
s2, filtering the electrolyte obtained after the electrolysis in the step S1 to obtain gold hydroxide, and slowly adding the gold hydroxide into the electrolyte according to the following steps: sodium sulfite molar ratio = 1:6 in sodium sulfite solution formulated. In the process, a small amount of addition is adopted for multiple times, when the addition is carried out initially, the solution is pale yellow, and after the solution becomes colorless and transparent, the gold hydroxide is continuously added until the addition of the gold hydroxide is complete. During which the pH of the solution was controlled to 10.0 with sulfuric acid. Filtering the solution to obtain gold sulfite solution.
Example 3
The embodiment provides a preparation method of a gold sulfite solution, which takes sulfuric acid as electrolyte, generates a gold hydroxide film through electrolysis, and is subjected to complexing with sodium sulfite after filtration and filtration to obtain the gold sodium sulfite solution, as shown in fig. 1, and the specific process steps comprise:
s1, high-purity gold (more than or equal to 99.999%) is used as an anode, a high-purity gold electrode is used as a cathode, sulfuric acid with the concentration of 0.2mol/L is used as electrolyte, the temperature of the solution is controlled to be 50 ℃, and 500mA/cm is set 2 And (3) generating a gold hydroxide film on the gold anode by current density. Under the action of oxygen precipitation and compression force, gold hydroxide is automatically stripped and falls into electrolyte;
s2, filtering the electrolyte obtained after the electrolysis in the step S1 to obtain gold hydroxide, and slowly adding the gold hydroxide into the electrolyte according to the following steps: sodium sulfite molar ratio = 1:3 in sodium sulfite solution formulated. In the process, a small amount of addition is adopted for multiple times, when the addition is carried out initially, the solution is pale yellow, and after the solution becomes colorless and transparent, the gold hydroxide is continuously added until the addition of the gold hydroxide is complete. During which the pH of the solution was controlled to 6.0 with sulfuric acid. Filtering the solution to obtain gold sulfite solution.
Example 4
The embodiment provides a preparation method of a gold sulfite solution, which takes sulfuric acid as electrolyte, generates a gold hydroxide film through electrolysis, and is subjected to complexing with sodium sulfite after filtration and filtration to obtain the gold sodium sulfite solution, as shown in fig. 1, and the specific process steps comprise:
s1, high-purity gold (more than or equal to 99.999%) is used as an anode, a high-purity gold electrode is used as a cathode, sulfuric acid with the concentration of 0.05mol/L is used as electrolyte, the temperature of the solution is controlled to be 40 ℃, and 10mA/c is setm 2 And (3) generating a gold hydroxide film on the gold anode by current density. Under the action of oxygen precipitation and compression force, gold hydroxide is automatically stripped and falls into electrolyte;
s2, filtering the electrolyte obtained after the electrolysis in the step S1 to obtain gold hydroxide, and slowly adding the gold hydroxide into the electrolyte according to the following steps: sodium sulfite molar ratio = 1:5 in sodium sulfite solution formulated. In the process, a small amount of addition is adopted for multiple times, when the addition is carried out initially, the solution is pale yellow, and after the solution becomes colorless and transparent, the gold hydroxide is continuously added until the addition of the gold hydroxide is complete. During which the pH of the solution was controlled to 8.0 with sulfuric acid. Filtering the solution to obtain gold sulfite solution.
Example 5
The embodiment provides a preparation method of a gold sulfite solution, which takes sulfuric acid as electrolyte, generates a gold hydroxide film through electrolysis, and is subjected to complexing with potassium sulfite after filtration and filtration to obtain a gold sodium sulfite solution, as shown in fig. 1, and the specific process steps comprise:
s1, high-purity gold (more than or equal to 99.999%) is used as an anode, a stainless steel electrode is used as a cathode, sulfuric acid with the concentration of 0.1mol/L is used as electrolyte, the temperature of the electrolyte is controlled to be 50 ℃, and 100mA/cm is set 2 And (3) generating a gold hydroxide film on the gold anode by current density. Under the action of oxygen precipitation and compression force, gold hydroxide is automatically stripped and falls into electrolyte;
s2, filtering the electrolyte obtained after the electrolysis in the step S1 to obtain gold hydroxide, and slowly adding the gold hydroxide into the electrolyte according to the following steps: potassium sulfite molar ratio = 1:5. In the process, a small amount of addition is adopted for multiple times, when the addition is carried out initially, the solution is pale yellow, and after the solution becomes colorless and transparent, the gold hydroxide is continuously added until the addition of the gold hydroxide is complete. During which the pH of the solution was controlled to 8.0 with sulfuric acid. Filtering the solution to obtain the potassium gold sulfite solution.
Various modifications and variations of the present invention will be apparent to those skilled in the art in light of the foregoing teachings and are intended to be included within the scope of the following claims.
Claims (6)
1. The preparation method of the gold sulfite solution is characterized by comprising the following steps:
s1, electrolyzing high-purity gold serving as an anode, an inert electrode serving as a cathode and sulfuric acid serving as electrolyte, and controlling current density to generate a gold hydroxide film at the anode; under the action of oxygen precipitation and compression force, gold hydroxide can be automatically stripped and fallen into electrolyte;
s2, filtering the electrolyte after the electrolysis in the step S1 to obtain gold hydroxide, and slowly adding the gold hydroxide into a sulfite solution; the adding process adopts a plurality of small-amount adding, when the adding is carried out initially, the solution is light yellow, and after the solution becomes colorless and transparent, the gold hydroxide is continuously added until the gold hydroxide is added completely; controlling the pH value of the solution to be 6.0-10.0 during the adding period; finally filtering to obtain the gold sulfite solution.
2. The method for producing a gold sulfite solution according to claim 1, wherein in the step S1, the concentration of sulfuric acid is 0.05 to 0.2mol/L.
3. The method for producing a gold sulfite solution according to claim 1, wherein in step S1, the electrolysis temperature is 20-50 ℃.
4. The method for producing a gold sulfite solution according to claim 1, wherein in the step S1, the current density of electrolysis is 10-500mA/cm 2 。
5. The method for producing a gold sulfite solution according to claim 1, wherein in the step S2, the sulfite is one of ammonium sulfite, sodium sulfite, potassium sulfite, sodium bisulfite, and potassium bisulfite.
6. The method for producing a gold sulfite solution according to claim 1, wherein in step S2, the sulfite solution is prepared according to gold: sulfite molar ratio = 1:3-1:6.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03146419A (en) * | 1989-11-01 | 1991-06-21 | Tanaka Kikinzoku Kogyo Kk | Production of gold sulfite |
| RU2187580C1 (en) * | 2001-05-04 | 2002-08-20 | Институт химии и технологии редких элементов и минерального сырья им. И.В.Тананаева Кольского научного центра РАН | Technology of extraction of gold from golden coat on substrate of copper or its alloy |
| JP2006249485A (en) * | 2005-03-10 | 2006-09-21 | Japan Pure Chemical Co Ltd | Gold sulfite salt aqueous solution for gold plating |
| CN113046800A (en) * | 2021-02-04 | 2021-06-29 | 深圳市金正龙科技有限公司 | Gold sodium sulfite electroplating solution and preparation method thereof |
-
2022
- 2022-08-02 CN CN202210923305.4A patent/CN115108579B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03146419A (en) * | 1989-11-01 | 1991-06-21 | Tanaka Kikinzoku Kogyo Kk | Production of gold sulfite |
| RU2187580C1 (en) * | 2001-05-04 | 2002-08-20 | Институт химии и технологии редких элементов и минерального сырья им. И.В.Тананаева Кольского научного центра РАН | Technology of extraction of gold from golden coat on substrate of copper or its alloy |
| JP2006249485A (en) * | 2005-03-10 | 2006-09-21 | Japan Pure Chemical Co Ltd | Gold sulfite salt aqueous solution for gold plating |
| CN113046800A (en) * | 2021-02-04 | 2021-06-29 | 深圳市金正龙科技有限公司 | Gold sodium sulfite electroplating solution and preparation method thereof |
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