CN208430213U - Device for circuit board recycling tin - Google Patents
Device for circuit board recycling tin Download PDFInfo
- Publication number
- CN208430213U CN208430213U CN201820629630.9U CN201820629630U CN208430213U CN 208430213 U CN208430213 U CN 208430213U CN 201820629630 U CN201820629630 U CN 201820629630U CN 208430213 U CN208430213 U CN 208430213U
- Authority
- CN
- China
- Prior art keywords
- tin
- liquid
- electrolytic cell
- work nest
- circuit board
- 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.)
- Expired - Fee Related
Links
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
Abstract
The utility model relates to a kind of devices for circuit board recycling tin, including the first work nest and the second work nest, first work nest includes moving back molten tin bath and reservoir, second work nest includes supplemental tank and electrolytic cell, cathode plate and anode plate are equipped in the electrolytic cell, it is described to move back molten tin bath liquid is pumped into reservoir by the first liquid pump, liquid is pumped into electrolytic cell by the reservoir by the second liquid pump, liquid is pumped into supplemental tank by the electrolytic cell by third liquid pump, and liquid is pumped by the 4th liquid pump and is moved back in molten tin bath by the supplemental tank.Compact arrangement of equipment involved in the utility model is reasonable, realizes continuous production, operates also more safely controllable, has very strong service performance.
Description
Technical field
The utility model relates to tin recycling, and in particular to a kind of device for circuit board recycling tin.
Background technique
Printed wiring board (PCB) industry is the basis of hyundai electronics and information industry, right with the development of high-tech industry
The demand of wiring board increases year by year.The manufacturing process of PCB has as many as 20 procedures, wherein can generate largely includes spent solder stripper
Waste liquid inside.Tin stripping liquid is broadly divided into three types at present: fluoride type, by hydrofluoric acid, villiaumite (ammonium acid fluoride), peroxidating
The composition such as object；Nitric acid type tin stripper, by nitric acid, ferric nitrate, corrosion inhibiter, surfactant, nitrogen oxides inhibitor, complexing agent etc.
Composition；The composition of nitric acid-alkyl sulfonic acid type, the dosage form is similar with nitric acid type etching agent, and difference is only that concentration of nitric acid is lower,
Generally≤15%；This three classes tin stripping liquid can all cause serious pollution to environment, and cause to subsequent recovery tin and be greatly stranded
It is difficult.Currently, the method for recycling tin has distillation recovery method, acidic precipitation agent facture, prepares stannic acid product, electrolysis method and ion friendship
Method etc. is changed, but the above method all has following defects that other a large amount of waste liquids of generation and sludge, causes secondary pollution, and
Complex process, condition control is stringent, processing cost is high.
Utility model content
In order to overcome drawbacks described above, the utility model provides a kind of device for circuit board recycling tin, the device application
In moving back in tin and recycling process of tin for circuit board, it can be realized recycling for tin stripping liquid, waste liquid and sludge will not be generated, thus
Avoid the problem of secondary pollution is caused to environment generation.
The utility model is to solve technical solution used by its technical problem:
A kind of device for circuit board recycling tin, including the first work nest and the second work nest, first work nest
Including moving back molten tin bath and reservoir, second work nest includes supplemental tank and electrolytic cell, be equipped in the electrolytic cell cathode plate and
Anode plate, described to move back molten tin bath liquid is pumped into reservoir by the first liquid pump, the reservoir is by the second liquid pump by liquid
It is pumped into electrolytic cell, liquid is pumped into supplemental tank by the electrolytic cell by third liquid pump, and the supplemental tank passes through the 4th liquid pump
Liquid is pumped into and is moved back in molten tin bath.
Preferably, the cathode plate is titanium plate, titanium net, copper sheet, sheet tin or stainless steel plate, and the anode plate is titanium plate, titanium
Net or graphite.
Preferably, described to move back molten tin bath and electrolytic cell is respectively equipped with refrigeration system, heating system and circulating pump, the refrigeration system
System and heating system are for controlling the operating temperature moved back in molten tin bath and electrolytic cell.
Preferably, the refrigeration system includes compressor and refrigeration piping, and the heating system includes heating tube.
Preferably, first work nest and the second work nest are all PP plastic channel, and are all double-layer structure, described first
The upper layer of work nest be move back molten tin bath, lower layer is reservoir, the upper layer of second work nest is supplemental tank, lower layer is electrolytic cell.
Preferably, filter screen is equipped between the cathode plate and anode plate, electrolytic cell is isolated into cathode by the filter screen
Room and anode chamber.
The beneficial effects of the utility model are:
1) it is equipped in the utility model and moves back molten tin bath, reservoir, electrolytic cell and supplemental tank, when the tin concentration moved back in molten tin bath reaches
When 120g/L, part tin stripping liquid is pumped into reservoir, and the stanniferous tin stripping liquid lower than 15g/L in supplemental tank is pumped into and moves back tin
Slot, to ensure that the lasting progress for moving back process of tin；It, will when tin concentration is reduced to 15g/L in electrolytic cell in electrolytic process
Electrolyte in electrolytic cell is pumped into supplemental tank, and the tin stripping liquid by the Theil indices in reservoir higher than 120g/L is pumped into electrolytic cell
It is interior, so that electrolytic process is able to continue progress；Therefore the utility model uses and moves back molten tin bath, reservoir, electrolytic cell and supplemental tank
It cooperates, so that moving back process of tin and tin recovery process is able to continue progress, improves production efficiency；
2) any nitric acid ingredient is not contained in the utility model in original tin stripping liquid, therefore any ammonia nitrogen, total will not be generated
The pollutants such as phosphorus are a kind of environmentally friendly products；And the copper-protection agent of addition is used for protection circuit plate by the copper facing under tin covering
Layer, prevents layers of copper to be corroded；
3) the utility model realizes the cycling and reutilization of tin stripping liquid, and tin is returned with electrodeposition at the formation of metallic tin
It receives, recycles the purity is high of tin, the other compositions in tin stripping liquid can be recycled infinitely, and object without secondary pollution draws
Into, harm of the reduction to the mankind, other biological and environment, and realize recycling for resource；Involved in the utility model
Compact arrangement of equipment is reasonable, realizes continuous production, operates also more safely controllable, has very strong service performance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
In figure: the first work nest of 10-, 11- move back molten tin bath, 12- reservoir, the second work nest of 20-, 21- supplemental tank, 22- electricity
Solve slot, 23- cathode plate, 24- anode plate, the first liquid pump of 31-, the second liquid pump of 32-, 33- third liquid pump, the 4th liquid pump of 34-.
Specific embodiment
Below in conjunction with the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear, complete
Site preparation description, it is clear that the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.
Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, fall within the protection scope of the utility model.
As shown in Figure 1, a kind of device for circuit board recycling tin, including the first work nest 10 and the second work nest 20,
First work nest 10 includes moving back molten tin bath 11 and reservoir 12, and second work nest 20 includes supplemental tank 21 and electrolytic cell
22, cathode plate 23 and anode plate 24 are equipped in the electrolytic cell 22, liquid is pumped by the molten tin bath 11 that moves back by the first liquid pump 31
In reservoir 12, liquid is pumped into electrolytic cell 22 by the reservoir 12 by the second liquid pump 32, and the electrolytic cell 22 passes through the
Liquid is pumped into supplemental tank 21 by three liquid pumps 33, and liquid is pumped by the supplemental tank 21 by the 4th liquid pump 34 to move back in molten tin bath.?
In the manufacture craft of circuit board, in order to protect the layers of copper of specific region not to be corroded, it is often necessary to will be plated in the layers of copper in the region
Upper one layer of protection tin layers after corroding the layers of copper in other regions, and need tin layers stripping will to be protected to fall by moving back process of tin,
So that layers of copper is exposed to carry out subsequent technique again.The present apparatus is exactly that and will move back for moving back in process of tin during this
The tin to get off is recycled again.The tin on circuit board is dissolved into tin stripping liquid by tin stripping liquid in moving back molten tin bath, in electrolytic cell
It is middle by containing in tin stripping liquid contain more tin be adsorbed on cathode plate, recycled and scraping the tin layers on cathode plate high-purity
The tin of degree, while the concentration of tin in tin stripping liquid is greatly reduced, this tin stripping liquid returned to move back in molten tin bath be recycled again；It is logical
Crossing the present apparatus can complete to move back tin and recycling tin twice technique, and realize recycling for tin stripping liquid, it is entirely avoided tradition
The problems such as waste liquid discharging amount present in tin stripping liquid treatment process is big, the tin rate of recovery is low and environmental pollution is big.
Wherein, the cathode plate 23 be titanium plate, titanium net, copper sheet, sheet tin or stainless steel plate, the anode plate 24 be titanium plate,
Titanium net or graphite.It is described to move back molten tin bath 11 and electrolytic cell 22 is respectively equipped with refrigeration system, heating system and circulating pump, the refrigeration system
System and heating system are for controlling the operating temperature moved back in molten tin bath and electrolytic cell.The refrigeration system includes compressor and refrigerator pipes
Road, the heating system include heating tube.First work nest 10 and the second work nest 20 are all PP plastic channel, and are all double
Layer structure, the upper layer of first work nest 10 be move back molten tin bath 11, lower layer is reservoir 12, the upper layer of second work nest 20
It is electrolytic cell 22 for supplemental tank 21, lower layer.Filter screen is equipped between the cathode plate 23 and anode plate 24, the filter screen will be electric
Solution slot 22 is isolated into cathode chamber and anode chamber.
The specific operating method of the utility model is as follows:
Step 1: original tin stripping liquid being added to and is moved back in molten tin bath 11, and the circuit board cleaned up is immersed in and moves back moving back for molten tin bath
In tin liquor, using refrigeration or heating system tin 1-6h is moved back into the temperature control of tin stripping liquid at 20-50 DEG C, move back tin and after the completion will
The circuit board for having moved back tin takes out, and is put into next group circuit board；Each component and its parts by weight in the original tin stripping liquid are as follows: methyl sulphur
It is 100-200 parts sour；100-200 parts of tin methane sulfonate；It is agent 5-80 parts comprehensive；5-15 parts of copper-protection agent；200-500 parts of deionized water；
The comprehensive agent is at least one of sodium chloride, potassium iodide, potassium chloride, sodium iodide, and the copper-protection agent is benzotriazole
(BTA), imidazoles, benzimidazole, methyl benzotriazazole (TTA), phenol, resorcinol, m-aminophenol, nitrophenols and amino
At least one of sulfonic acid；The comprehensive agent can promote the tin on circuit board to dissolve, and improve molten tin speed；The copper-protection agent is used
In protection circuit plate by the copper plate under tin covering, layers of copper is prevented to be corroded；
Step 2: the concentration that tin in tin stripping liquid in molten tin bath is moved back in measurement passes through the first liquid when the concentration of tin reaches 120g/L
The tin stripping liquid part moved back in molten tin bath is pumped into reservoir 12 by pump 31；
Step 3:, will be in reservoir by the second liquid pump 32 after the tin stripping liquid in reservoir 12 reaches certain liquid level
Tin stripping liquid part be pumped into electrolytic cell 22, using in electrolytic cell cathode plate 23 and anode plate 24 to the tin stripping liquid in electrolytic cell
Electrodeposition processing is carried out, so that metallic tin is adsorbed on cathode plate 23；The cathode plate 23 is titanium plate, titanium net, copper sheet, sheet tin or not
Become rusty steel plate, and the anode plate 24 is titanium plate, titanium net or graphite, the condition of electrodeposition are as follows: current density 100-450A/m2, temperature
It is 20-35 DEG C；
Step 4: the concentration of tin stops electrodeposition when tin concentration is reduced to 10g/L in tin stripping liquid in measurement electrolytic cell, from
Metallic tin is separated on cathode plate, while the tin stripping liquid part in electrolytic cell being pumped into supplemental tank 21 using third liquid pump 33,
And the tin stripping liquid part in reservoir is pumped into electrolytic cell 22 by the second liquid pump 32 persistently carries out tin recovery processing again；
Step 5: it the tin stripping liquid in supplemental tank 21 is pumped into move back by the 4th liquid pump 34 is used for next group circuit board in molten tin bath
Move back tin so that tin stripping liquid complete to circuit board move back tin and tin reclaimer operation after be recycled.
Embodiment 1:
Step 1: original tin stripping liquid: each component and its parts by weight is configured are as follows: 100 parts of methane sulfonic acid, tin methane sulfonate
100 parts, comprehensive 5 parts of agent, 5 parts of copper-protection agent, 200 parts of deionized water, mix the above components evenly up to original tin stripping liquid；
Step 2: original tin stripping liquid being added to and is moved back in molten tin bath 11, and the circuit board cleaned up is immersed in and moves back moving back for molten tin bath
In tin liquor, tin 1h is moved back into the temperature control of tin stripping liquid at 20 DEG C using refrigeration or heating system, and will move back by circulating pump
Tin stripping liquid in molten tin bath recycles in carrying out, and guarantees the uniformity for moving back tin stripping liquid in molten tin bath；
Step 3: the concentration that tin in tin stripping liquid in molten tin bath is moved back in measurement passes through the first liquid when the concentration of tin reaches 120g/L
The tin stripping liquid part moved back in molten tin bath is pumped into reservoir 12 by pump 31；
Step 4:, will be in reservoir by the second liquid pump 32 after the tin stripping liquid in reservoir 12 reaches certain liquid level
Tin stripping liquid part be pumped into electrolytic cell 22, using in electrolytic cell cathode plate 23 and anode plate 24 to the tin stripping liquid in electrolytic cell
Electrodeposition processing is carried out, so that metallic tin is adsorbed on cathode plate 23, current density 250A/m2；Utilize refrigeration or heating system
System controls the temperature of tin stripping liquid at 25 DEG C, and the tin stripping liquid in electrolytic cell is carried out interior circulation by circulating pump, guarantees electrolysis
The uniformity of tin stripping liquid in slot；
Step 5: the concentration of tin stops electrodeposition when tin concentration is reduced to 15g/L in tin stripping liquid in measurement electrolytic cell, from
Metallic tin is separated on cathode plate, while the tin stripping liquid part in electrolytic cell being pumped into supplemental tank 21 using third liquid pump 33；
Step 6: it the tin stripping liquid in supplemental tank 21 is pumped into move back by the 4th liquid pump 34 is used for next group circuit board in molten tin bath
Move back tin so that tin stripping liquid complete to circuit board move back tin and tin reclaimer operation after be recycled.
Embodiment 2: difference from Example 1 is as follows:
Step 1: original tin stripping liquid: each component and its parts by weight is configured are as follows: 135 parts of methane sulfonic acid, tin methane sulfonate
130 parts, comprehensive 20 parts of agent, 10 parts of copper-protection agent, 300 parts of deionized water, mix the above components evenly up to original tin stripping liquid；
Step 2: original tin stripping liquid being added to and is moved back in molten tin bath 11, and the circuit board cleaned up is immersed in and moves back moving back for molten tin bath
In tin liquor, tin 2h is moved back into the temperature control of tin stripping liquid at 30 DEG C using refrigeration or heating system, and will move back by circulating pump
Tin stripping liquid in molten tin bath recycles in carrying out, and guarantees the uniformity for moving back tin stripping liquid in molten tin bath.
Embodiment 3: difference from Example 1 is as follows:
Step 1: original tin stripping liquid: each component and its parts by weight is configured are as follows: 170 parts of methane sulfonic acid, tin methane sulfonate
170 parts, comprehensive 50 parts of agent, 8 parts of copper-protection agent, 350 parts of deionized water, mix the above components evenly up to original tin stripping liquid；
Step 2: original tin stripping liquid being added to and is moved back in molten tin bath 11, and the circuit board cleaned up is immersed in and moves back moving back for molten tin bath
In tin liquor, tin 4.5h is moved back into the temperature control of tin stripping liquid at 30 DEG C using refrigeration or heating system, and will by circulating pump
It moves back the tin stripping liquid in molten tin bath and carries out interior circulation, guarantee the uniformity for moving back tin stripping liquid in molten tin bath.
Embodiment 4: difference from Example 1 is as follows:
Step 1: original tin stripping liquid: each component and its parts by weight is configured are as follows: 200 parts of methane sulfonic acid, tin methane sulfonate
200 parts, comprehensive 80 parts of agent, 15 parts of copper-protection agent, 500 parts of deionized water, mix the above components evenly up to original tin stripping liquid；
Step 2: original tin stripping liquid being added to and is moved back in molten tin bath 11, and the circuit board cleaned up is immersed in and moves back moving back for molten tin bath
In tin liquor, tin 6h is moved back into the temperature control of tin stripping liquid at 50 DEG C using refrigeration or heating system, and will move back by circulating pump
Tin stripping liquid in molten tin bath recycles in carrying out, and guarantees the uniformity for moving back tin stripping liquid in molten tin bath.
It is obtained by test, by the tin layers on embodiment 1-4 treated circuit board, 100% can be reached and moved back
Tin rate, the purity of the metallic tin of recycling all reaches 98% or more, therefore is handled by originally moving back tin method circuit board, moves back tin
Rate is high, and the metallic tin recycled is quality, can reuse or sell；Device used in the utility model is compact simultaneously, grasps
It is simple to make method, tin stripping liquid can be avoided traditional spent solder stripper and be asked what environment caused seriously to pollute by repeated multiple times use
Topic.
It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the premise utility,
Various modifications and improvements can be made, and these are all within the protection scope of the present invention.Therefore, the utility model patent
The scope of protection shall be subject to the appended claims.
Claims (6)
1. a kind of device for circuit board recycling tin, it is characterised in that: including the first work nest (10) and the second work nest
(20), first work nest (10) includes moving back molten tin bath (11) and reservoir (12), and second work nest (20) includes supplement
Slot (21) and electrolytic cell (22) are equipped with cathode plate (23) and anode plate (24) in the electrolytic cell (22), described to move back molten tin bath (11)
Liquid is pumped into reservoir (12) by the first liquid pump (31), the reservoir (12) passes through the second liquid pump (32) for liquid pump
Enter in electrolytic cell (22), liquid is pumped into supplemental tank (21) by the electrolytic cell (22) by third liquid pump (33), the supplement
Liquid is pumped by the 4th liquid pump (34) and is moved back in molten tin bath by slot (21).
2. the device according to claim 1 for circuit board recycling tin, it is characterised in that: the cathode plate (23) is titanium
Plate, titanium net, copper sheet, sheet tin or stainless steel plate, the anode plate (24) are titanium plate, titanium net or graphite.
3. the device according to claim 1 for circuit board recycling tin, it is characterised in that: described to move back molten tin bath (11) and electricity
Solution slot (22) is respectively equipped with refrigeration system, heating system and circulating pump, and the refrigeration system and heating system, which are used to control, moves back tin
Operating temperature in slot and electrolytic cell.
4. the device according to claim 3 for circuit board recycling tin, it is characterised in that: the refrigeration system includes pressure
Contracting machine and refrigeration piping, the heating system include heating tube.
5. the device according to claim 1 for circuit board recycling tin, it is characterised in that: first work nest (10)
All it is PP plastic channel with the second work nest (20), and is all double-layer structure, the upper layer of first work nest (10) is to move back molten tin bath
(11), lower layer is reservoir (12), and the upper layer of second work nest (20) is supplemental tank (21), lower layer is electrolytic cell (22).
6. the device according to claim 1 for circuit board recycling tin, it is characterised in that: the cathode plate (23) and sun
Filter screen is equipped between pole plate (24), electrolytic cell (22) are isolated into cathode chamber and anode chamber by the filter screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820629630.9U CN208430213U (en) | 2018-04-28 | 2018-04-28 | Device for circuit board recycling tin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820629630.9U CN208430213U (en) | 2018-04-28 | 2018-04-28 | Device for circuit board recycling tin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208430213U true CN208430213U (en) | 2019-01-25 |
Family
ID=65103273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820629630.9U Expired - Fee Related CN208430213U (en) | 2018-04-28 | 2018-04-28 | Device for circuit board recycling tin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208430213U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108300872A (en) * | 2018-04-28 | 2018-07-20 | 昆山雅鑫化工有限公司 | The devices and methods therefor of tin is recycled for circuit board |
-
2018
- 2018-04-28 CN CN201820629630.9U patent/CN208430213U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108300872A (en) * | 2018-04-28 | 2018-07-20 | 昆山雅鑫化工有限公司 | The devices and methods therefor of tin is recycled for circuit board |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108300872A (en) | The devices and methods therefor of tin is recycled for circuit board | |
| CN105734620B (en) | Tin stripping and tin plating liquid, preparing method of tin stripping and tin plating liquid and cyclic regeneration method for adopting tin stripping and tin plating liquid for recycling metal tin | |
| CN103741142B (en) | A kind of tin stripper based on hydrochloric acid-pink salt system and the method reclaiming stannum from waste tin stripper | |
| CN105483707B (en) | A kind of method that alkaline copper chloride etching waste liquid proposes copper reuse | |
| CN104894599A (en) | Recycling process of tin-removing waste liquid | |
| CN103060844A (en) | Resource recovering method for nitric acid type waste solder stripping solution | |
| CN106929857A (en) | Cupric acidity etching liquid recycling equipment for reclaiming and method | |
| BR112019009702B1 (en) | METHOD FOR ELECTROGALVANIZING A STEEL STRIP NOT COATED WITH A COATING LAYER | |
| CN102828226B (en) | Recyclable environment friendly electrolytic stripping solution, preparation method and usage method | |
| CN106884185A (en) | The technique and system and device of copper in a kind of recovery acidic etching liquid | |
| CN110042403A (en) | Deashing agent and preparation method thereof, application and silico-aluminum process for deashing | |
| CN109457272A (en) | The stabilizer and electrolyte of alkali etching regeneration cathode copper | |
| CN103290464A (en) | Electrochemical deplating method of stainless steel black coating film | |
| CN208430213U (en) | Device for circuit board recycling tin | |
| CN110172701B (en) | Acid etching solution regeneration recycling system | |
| CN107268007A (en) | A kind of method of tin removal waste liquor circular regeneration | |
| CN106222710A (en) | A kind of acid half bright tin plating solution and preparation method thereof | |
| CN110195222A (en) | A kind of RTR subtracts copper post-processing copper foil surface passivator and its use and preparation method | |
| CN102304720A (en) | Acidic degreasing liquid for aluminum alloy | |
| CN112813268B (en) | PCB (printed circuit board) copper electroplating and acid etching copper resource recycling method | |
| CN111663155B (en) | Comprehensive recovery treatment method for waste copper cutting liquid of copper nitrate | |
| CN101967666A (en) | Electrolytic phosphorization pool for electrolytic phosphorization of steel wire | |
| CN103436916B (en) | A kind of technique and device reclaiming smart copper from Low copper content wastewater | |
| CN212864982U (en) | Acid etching solution electrolysis copper extraction recycling device | |
| CN104131272B (en) | A kind of zero-emission type chemical nickel-plating liquid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190125 Termination date: 20190428 |