CN110129799A - Recycling method of tin stripping waste liquid based on sulfuric acid-ferric salt system - Google Patents
Recycling method of tin stripping waste liquid based on sulfuric acid-ferric salt system Download PDFInfo
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- CN110129799A CN110129799A CN201910363524.XA CN201910363524A CN110129799A CN 110129799 A CN110129799 A CN 110129799A CN 201910363524 A CN201910363524 A CN 201910363524A CN 110129799 A CN110129799 A CN 110129799A
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- tin
- sulfuric acid
- waste liquor
- removal waste
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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
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/30—Acidic compositions for etching other metallic material
-
- 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
- C23F1/00—Etching metallic material by chemical means
- C23F1/46—Regeneration of etching compositions
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/14—Electrolytic production, recovery or refining of metals by electrolysis of solutions of tin
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to a recycling method of tin stripping waste liquid based on a sulfuric acid-ferric salt system. The recycling method comprises the following steps: taking the tin stripping waste liquid as electrolyte, taking an electrode material with high hydrogen evolution overpotential as a cathode, taking an electrode material with high oxygen evolution overpotential as an anode, carrying out constant current electrification, and stripping tin simple substance deposited on the cathode. The recycling method provided by the invention can realize the recycling of tin and iron metal resources in the tin stripping waste liquid, the recovery rate of tin and Fe3+The conversion rate of the catalyst is up to more than 70 percent; in addition, compared with the original sulfuric acid-iron salt system tin stripping liquid, the acid value of the treated tin stripping waste liquid is not reduced basically, and simultaneously sulfuric acid and Fe3+Effective tin stripping components such as organic corrosion inhibitor and the like are reserved, so that the recovered tin stripping waste liquid can be reused in the tin stripping process; the recycling method provided by the invention is simple and convenient to operate, does not need a diaphragm, does not introduce other ions, and is convenient for large-scale production.
Description
Technical field
The invention belongs to industrial waste water treatments, and in particular to a kind of based on sulfuric acid-molysite system to move back tin useless
The recoverying and utilizing method of liquid.
Background technique
In the manufacturing process of printed wiring board (PCB), moving back tin is an indispensable step process；Tin is moved back, as its name suggests
Stripping is covered on copper sheet, protects the tin coating of Copper substrate.Being currently being widely used tin stripping liquid is based on nitric acid system
, but nitric acid system tin stripping liquid is easy to produce pernicious gas due to having used the oxidizing species such as nitric acid, generate mud with
And waste water it is difficult the disadvantages of；To overcome disadvantages mentioned above, patent CN105714298A discloses a kind of based on sulfuric acid-molysite system
Etching agent, which, which has, does not generate pernicious gas, only returns tin layers, environmental protection and the good feature of applicability.
Sulfuric acid-molysite system moves back tin mechanism and is shown below:
2Fe3++ Sn=2Fe2++Sn2+
Sn (alloy)+H2SO4=SnSO4+H2↑
In tin stripping liquid, the effect of sulfuric acid is dissolution tin oxide and tin alloy layers, forms soluble sulphate；The effect of molysite
It is the strong oxidizing property by iron ion, tin is oxidized to soluble-salt to achieve the purpose that remove tin and its tin alloy layers.Cause
This, ion present in tin removal waste liquor mainly has Fe2+, Sn2+, H+, SO4 2-There are also a small amount of Fe3+, Sn4+。
But the recoverying and utilizing method for the tin removal waste liquor announced now is all based on nitric acid system；Therefore, in order to
It promotes more environmentally-friendly effectively based on sulfuric acid-molysite system etching agent, the recycling side of the tin removal waste liquor based on the system
Method is urgently explored.
Summary of the invention
It is an object of the invention to overcome in the prior art based on based on the recycling of sulfuric acid-molysite system tin removal waste liquor
The shortage of method provides a kind of recoverying and utilizing method based on sulfuric acid-molysite system tin removal waste liquor.Recycling provided by the invention
The recycling of tin and ferrous metal resource in tin removal waste liquor, the rate of recovery and Fe of tin can be realized using method3+Conversion ratio it is high
Up to 70% or more；In addition, treated tin removal waste liquor, compared with ortho-sulfuric acid-molysite system tin stripping liquid, acid value does not drop substantially
It is low, while sulfuric acid, Fe3+Effectively tin ingredient is moved back with organic inhibitor etc. to be retained so that after recovery processing to move back tin useless
Liquid, which can be back to, moves back tin process；Recoverying and utilizing method provided by the invention is easy to operate, is not necessarily to diaphragm, does not introduce other ions,
And convenient for large-scale production.
For achieving the above object, the present invention adopts the following technical scheme:
A kind of recoverying and utilizing method based on sulfuric acid-molysite system tin removal waste liquor, includes the following steps: with tin removal waste liquor
For electrolyte, using the electrode material of high hydrogen gas evolution overpotential as cathode, using the superpotential electrode material of high oxygen separated as anode, into
The tin simple substance of removing cathode deposition after row constant current is powered；The tin removal waste liquor is moved back tin and is obtained by sulfuric acid-molysite system,
The sulfuric acid-molysite system by 150~300g/L of sulfuric acid, 100~200g/L of molysite, 0.1~1g/L of ferrous sulfate, copper it is organic
0.1~5g/L of corrosion inhibiter, organic acid 2~10g/L of complexing agent, 2~3g/L of surfactant, 10~100g/L of promotor composition；
The sulfuric acid-molysite system moves back tin to Fe2+And Sn2+Molar ratio be 1:0.5~1.0 tin removal waste liquor.
The present invention carries out electrolysis processing for sulfuric acid-molysite system tin removal waste liquor (such as CN105714298A), on cathode
The tin simple substance of reduction deposition at the electrode surface is obtained, oxidation reaction occurs for anode by Fe2+It is oxidized to Fe3+, tin is moved back by control
Fe afterwards2+And Sn2+Mole, realize Sn2+Recycling and Fe3+Conversion, the rate of recovery and Fe of tin3+Conversion ratio be up to
70% or more.
In addition, sulfuric acid and organic inhibitor etc. effectively move back tin ingredient and are retained in electrolytic process, Fe3+Content and former
Tin stripping liquid Fe3+Content it is close, acid value does not reduce substantially, so that tin removal waste liquor and former tin stripping liquid composition and performance after electrolysis
Substantially it is consistent, can be used for moving back tin process.
Recoverying and utilizing method provided by the invention is easy to operate, is not necessarily to diaphragm, does not introduce other ions, and convenient for extensive
Production.
The selection of the electrode material of cathode and anode can be chosen according to existing electrolysis material, to realize the deposition of tin
And Fe2+Oxidation.
Preferably, the electrode material that the cathode is selected is copper, tin, cadmium, graphite, silver, iron, zinc, nickel or lead.
Preferably, the electrode material that the anode is selected is graphite, lead, gold, silver or platinum.
The current potential of tin, anode Fe can be precipitated in electrical current according to cathode2+It is converted into Fe3+Current potential and its corresponding electricity
Current density is chosen.
Preferably, the current density of the energization is 40~80mA/cm2, 10~20h of time of energization.
It is further preferable that the electric current of the energization is 60mA/cm2, the time of energization is 18h.
Preferably, Fe in the tin removal waste liquor2+Concentration be 0.4~1mol/L, Sn2+Concentration be 0.2~0.5mol/
L。
Preferably, Fe in the tin removal waste liquor2+And Sn2+Molar ratio be 1:0.5.
Preferably, the electrolyte after energization is used as tin stripping liquid.
Because of sulfuric acid, Fe3+Ion, organic inhibitor etc. effectively moves back tin ingredient and is retained, therefore the electrolyte after being electrolysed can be made
It is recycled for tin stripping liquid.
It is further preferable that the electrolyte after the energization includes 150~300g/L of the concentrated sulfuric acid, 150~200g/L of molysite, sulphur
Sour ferrous iron 0.5~1.0g/L, Sn2+=0.03~0.08mol/L, 0.1~5g/L of organic inhibitor of copper, organic acid complexing agent 2
~10g/L, 2~3g/L of surfactant, 10~100g/L of promotor, surplus are water.
Compared with prior art, the invention has the following beneficial effects:
Recoverying and utilizing method provided by the invention can realize the recycling of tin and ferrous metal resource in tin removal waste liquor, tin
The rate of recovery and Fe3+Conversion ratio be up to 70% or more；In addition, treated tin removal waste liquor and ortho-sulfuric acid-molysite system move back tin
Liquid phase ratio, acid value do not reduce substantially, while sulfuric acid, Fe3+Effectively tin ingredient is moved back with organic inhibitor etc. to be retained, so that
Tin removal waste liquor after recovery processing, which can be back to, moves back tin process；Recoverying and utilizing method provided by the invention is easy to operate, nothing
Diaphragm is needed, does not introduce other ions, and convenient for large-scale production.
Detailed description of the invention
Fig. 1 is electrolysis transposition schematic diagram provided by the invention；
Wherein, 1 is cathode electrode material, and 2 be anode electrode material, and 3 be HDV-7C transistor potentiostat.
Specific embodiment
Below with reference to embodiment, the present invention is further explained.These embodiments are merely to illustrate the present invention rather than limitation
The scope of the present invention.Test method without specific conditions in lower example embodiment usually according to this field normal condition or is pressed
The condition suggested according to manufacturer；Used raw material, reagent etc., unless otherwise specified, being can be from the business such as conventional market
The raw materials and reagents that approach obtains.The variation for any unsubstantiality that those skilled in the art is done on the basis of the present invention
And replacement belongs to scope of the present invention.
Tin removal waste liquor (including tin removal waste liquor 1 and tin removal waste liquor 2) in each embodiment is prepared via a method which to obtain.
The preparation of 1.1 tin stripping liquids 1
Prepare a kind of based on sulfuric acid-molysite system tin stripping liquid 1, each component content is as follows: sulfuric acid 150g/L, ferric sulfate
100g/L, ferrous sulfate 0.5g/L, phenylpropyl triazole 1g/L, methane sulfonic acid 5g/L, polyethylene glycol (6000) 2g/L, hydrogen peroxide
10g/L, surplus are water.
It is specifically the preparation method comprises the following steps: ferric sulfate is soluble in water, sulfuric acid is added, stirs to being completely dissolved, is cooled to temperature
Benzotriazole, methane sulfonic acid, polyethylene glycol (6000) and hydrogen peroxide are added after room temperature, stirs to being completely dissolved, uses deionization
Water is settled to 1 liter to get sulfuric acid-molysite system tin stripping liquid 1.
1.2 move back tin
Prepare having a size of 5 centimetres of 5 cm x, it is average it is tin plating cover copper pure tins plating plate with a thickness of 10 microns several, move back tin work
Skill controls temperature at 30 DEG C, and pure tin plate is put into 100mL tin stripping liquid 1, does not stop to shake tin plate, and after 2 minutes, tin stripping is dry
Only, expose bright copper sheet, process does not generate toxic gas.
After measured, the composition of the tin removal waste liquor 1 are as follows: sulfuric acid 140g/L, Fe3+=0.01mol/L, Fe2+=0.444mol/
L, Sn2+=0.222mol/L, phenylpropyl triazole 0.8g/L, methane sulfonic acid 4.5g/L, polyethylene glycol (6000) 2g/L, hydrogen peroxide
8g/L, surplus are water.
The preparation of 2.1 tin stripping liquids 2
Prepare a kind of based on sulfuric acid-molysite system tin stripping liquid 2, each component content is as follows: sulfuric acid 150g/L, ferric sulfate
100g/L, ferrous sulfate 0.5g/L, phenylpropyl triazole 1g/L, methane sulfonic acid 5g/L, polyethylene glycol (6000) 2g/L, hydrogen peroxide
10g/L, surplus are water.
It is specifically the preparation method comprises the following steps: ferric sulfate is soluble in water, sulfuric acid is added, stirs to being completely dissolved, is cooled to temperature
Benzotriazole, methane sulfonic acid, polyethylene glycol (6000) and hydrogen peroxide are added after room temperature, stirs to being completely dissolved, uses deionization
Water is settled to 1 liter to get sulfuric acid-molysite system tin stripping liquid 2.
2.2 move back tin
Prepare having a size of 5 centimetres of 5 cm x, it is average it is tin plating cover copper pure tins plating plate with a thickness of 10 microns several, move back tin work
Skill controls temperature at 30 DEG C, and pure tin plate is put into 100mL tin stripping liquid 2, does not stop to shake tin plate, and after 2 minutes, tin stripping is dry
Only, expose bright copper sheet, process does not generate toxic gas.
After measured, the composition of the tin removal waste liquor 2 are as follows: sulfuric acid 140g/L, Fe3+=0.005mol/L, Fe2+=0.444mol/
L, Sn2+=0.444mol/L, phenylpropyl triazole 0.8g/L, methane sulfonic acid 4.5g/L, polyethylene glycol (6000) 2g/L, hydrogen peroxide
8g/L, surplus are water.
Embodiment 1
The present embodiment provides a kind of recoverying and utilizing method based on sulfuric acid-molysite system tin removal waste liquor 1, preparation process
It is as follows.
Such as Fig. 1,1 100mL of tin removal waste liquor is taken to be placed in electrolytic cell, Cu electrode as cathode, graphite electrode as anode,
With 40mA/cm2Constant current be powered electrolysis 14 hours, the tin simple substance that is deposited on Cu electrode of reduction, anode hair are obtained on cathode
Oxidation reaction is given birth to by Fe2+It is oxidized to Fe3+, tin removal waste liquor 1 slightly turns yellow by blue-green, scrapes the tin simple substance on cathode, weigh
1.89g。
After measured, the composition of the tin removal waste liquor 1 after electrolysis are as follows: sulfuric acid 140g/L, Fe3+=0.328mol/L, Fe2+=
0.0126mol/L, Sn2+=0.0657mol/L, phenylpropyl triazole 0.8g/L, methane sulfonic acid 4.5g/L, polyethylene glycol (6000)
2g/L, hydrogen peroxide 8g/L, surplus are water.
After electrolysis is handled, the rate of recovery of tin is 70.8%, Fe3+Conversion ratio is 71.6%.
Embodiment 2
The present embodiment provides a kind of recoverying and utilizing method based on sulfuric acid-molysite system tin removal waste liquor 1, preparation process
It is as follows.
1 100mL of tin removal waste liquor is taken to be placed in electrolytic cell, Cu electrode is as cathode, and graphite electrode is as anode, with 60mA/
cm2Constant current be powered electrolysis 18 hours, the tin simple substance that is deposited on Cu electrode of reduction, sun are obtained after fully reacting, on cathode
It is ferric ion that oxidation reaction, which occurs, for pole by oxidation of divalent iron ion, and tin removal waste liquor 1 is scraped on cathode by bluish-green subduing Huang
Tin simple substance, weigh to obtain 2.24g.
After measured, the composition of the tin removal waste liquor 1 after electrolysis are as follows: sulfuric acid 140g/L, Fe3+=0.39mol/L, Fe2+=
0.064mol/L, Sn2+=0.036mol/L, phenylpropyl triazole 0.8g/L, methane sulfonic acid 4.5g/L, polyethylene glycol (6000) 2g/
L, hydrogen peroxide 8g/L, surplus are water.
After electrolysis is handled, the rate of recovery of tin is 84.0%, conversion ratio 85.6%.
Embodiment 3
The present embodiment provides a kind of recoverying and utilizing method based on sulfuric acid-molysite system tin removal waste liquor 1, preparation process
It is as follows.
1 100mL of tin removal waste liquor is placed in electrolytic cell, Cu electrode is as cathode, and graphite electrode is as anode, with 80mA/
cm2Constant current be powered electrolysis 10 hours, the tin simple substance that is deposited on Cu electrode of reduction, sun are obtained after fully reacting, on cathode
It is ferric ion that oxidation reaction, which occurs, for pole by oxidation of divalent iron ion, and tin removal waste liquor scrapes cathode by blue-green flavescence green
On tin simple substance, weigh to obtain 2.06g.
After measured, the composition of the tin removal waste liquor 1 after electrolysis are as follows: sulfuric acid 140g/L, Fe3+=0.358mol/L, Fe2+=
0.096mol/L, Sn2+=0.0514mol/L, phenylpropyl triazole 0.8g/L, methane sulfonic acid 4.5g/L, polyethylene glycol (6000) 2g/
L, hydrogen peroxide 8g/L, surplus are water.
After electrolysis is handled, the rate of recovery of tin is 77.1%, conversion ratio 78.4%.
Embodiment 4
The present embodiment provides a kind of recoverying and utilizing method based on sulfuric acid-molysite system tin removal waste liquor 2, preparation process
It is as follows.
2 100mL of tin removal waste liquor is placed in electrolytic cell, Cu electrode is as cathode, and graphite electrode is as anode, with 65mA/
cm2Constant current be powered electrolysis 18 hours, the tin simple substance that is deposited on Cu electrode of reduction, sun are obtained after fully reacting, on cathode
It is ferric ion that oxidation reaction, which occurs, for pole by oxidation of divalent iron ion, and tin removal waste liquor scrapes cathode by blue-green flavescence green
On tin simple substance, weigh to obtain 3.95g.
After measured, the composition of the tin removal waste liquor 2 after electrolysis are as follows: sulfuric acid 140g/L, Fe3+=0.225mol/L, Fe2+=
0.101mol/L, Sn2+=0.111mol/L, phenylpropyl triazole 0.8g/L, methane sulfonic acid 4.5g/L, polyethylene glycol (6000) 2g/
L, hydrogen peroxide 8g/L, surplus are water.
After electrolysis is handled, the rate of recovery of tin is 75%, conversion ratio 77.2%.
Embodiment 5
The present embodiment provides a kind of circulation utilization methods of tin removal waste liquor 1.
Tin removal waste liquor 1 after embodiment 2 is electrolysed is used as tin stripping liquid, to having a size of 5 centimetres of 5 cm x, average tin plating thickness
Degree, which for one piece of 10 microns covers copper pure tin and plates plate, to carry out moving back tin processing, and the condition for the treatment of process is as follows: moving back process of tin control temperature
At 30 DEG C, pure tin plate is put into 100mL tin stripping liquid, does not stop to shake tin plate.The tin coating on copper sheet surface layer moves back after processing
Except clean, expose bright copper sheet, process has not generated poison gas.
It can be seen from the above, recoverying and utilizing method provided by the invention can realize time of tin and ferrous metal resource in tin removal waste liquor
It receives and utilizes, the rate of recovery and Fe of tin3+Conversion ratio be up to 70% or more；In addition, treated tin removal waste liquor and ortho-sulfuric acid-iron
Salt system tin stripping liquid is compared, and acid value does not reduce substantially, while sulfuric acid, Fe3+Tin is effectively moved back with organic inhibitor etc. at getting
To retain, the tin removal waste liquor after recovery processing is back to and moves back tin process；Recoverying and utilizing method provided by the invention
It is easy to operate, it is not necessarily to diaphragm, does not introduce other ions, and convenient for large-scale production.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (9)
1. a kind of recoverying and utilizing method based on sulfuric acid-molysite system tin removal waste liquor, which comprises the steps of:
Using tin removal waste liquor as electrolyte, using the electrode material of high hydrogen gas evolution overpotential as cathode, with the superpotential electrode material of high oxygen separated
As anode, the tin simple substance of removing cathode deposition after constant current energization is carried out；The tin removal waste liquor passes through sulfuric acid-molysite body
System moves back tin and obtains, and the sulfuric acid-molysite system is by 150~300g/L of the concentrated sulfuric acid, 100~200g/L of molysite, and ferrous sulfate 0.1~
1g/L, 0.1~5g/L of organic inhibitor of copper, organic acid 2~10g/L of complexing agent, 2~3g/L of surfactant, promotor 10
~100g/L composition；The sulfuric acid-molysite system moves back tin to Fe2+And Sn2+Molar ratio be 1:0.5~1.0 tin removal waste liquor.
2. recoverying and utilizing method according to claim 1, which is characterized in that the electrode material that the cathode is selected be copper, tin,
Cadmium, graphite, silver, iron, zinc, nickel or lead.
3. recoverying and utilizing method according to claim 1, which is characterized in that the electrode material that the anode is selected be graphite,
Lead, gold, silver or platinum.
4. recoverying and utilizing method according to claim 1, which is characterized in that the current density of the energization is 40~80mA,
The time of energization is 10~20h.
5. recoverying and utilizing method according to claim 4, which is characterized in that the current density of the energization is 60mA/cm2, lead to
The time of electricity is 18h.
6. recoverying and utilizing method according to claim 1, which is characterized in that Fe in the tin removal waste liquor2+Concentration be 0.4~
1mol/L, Sn2+Concentration be 0.2~0.5mol/L.
7. recoverying and utilizing method according to claim 1, which is characterized in that Fe in the tin removal waste liquor2+And Sn2+Molar ratio
For 1:0.5.
8. recovery method according to claim 1, which is characterized in that the electrolyte after energization is used as tin stripping liquid.
9. recovery method according to claim 8, which is characterized in that the electrolyte after the energization include the concentrated sulfuric acid 150~
300g/L, 150~200g/L of molysite, 0.5~1g/L of ferrous sulfate, Sn2+=0.03~0.08mol/L, the organic inhibitor of copper
0.1~5g/L, 2~10g/L of organic acid complexing agent, 2~3g/L of surfactant, 10~100g/L of promotor.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110760922A (en) * | 2019-10-30 | 2020-02-07 | 昆山金易得环保科技有限公司 | Tin stripping liquid, method for removing tin-containing layer on substrate and method for recovering tin |
| CN110777423A (en) * | 2019-10-30 | 2020-02-11 | 昆山金易得环保科技有限公司 | Tin stripping liquid and method for recovering tin |
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| CN103741142A (en) * | 2014-01-10 | 2014-04-23 | 中南大学 | Method for recycling tin from waste tin-stripping solution based on tin-stripping solution of hydrochloric acid-tin salt system |
| CN104894599A (en) * | 2015-06-23 | 2015-09-09 | 成都虹华环保科技股份有限公司 | Recycling process of tin-removing waste liquid |
| CN105734620A (en) * | 2016-03-11 | 2016-07-06 | 深圳市松柏实业发展有限公司 | 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 |
| CN105714298A (en) * | 2016-03-23 | 2016-06-29 | 广东工业大学 | Tin stripping agent based on sulfuric acid-ferric salt system and preparing method of tin stripping agent |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110760922A (en) * | 2019-10-30 | 2020-02-07 | 昆山金易得环保科技有限公司 | Tin stripping liquid, method for removing tin-containing layer on substrate and method for recovering tin |
| CN110777423A (en) * | 2019-10-30 | 2020-02-11 | 昆山金易得环保科技有限公司 | Tin stripping liquid and method for recovering tin |
| CN110777423B (en) * | 2019-10-30 | 2021-09-28 | 昆山金易得环保科技有限公司 | Tin stripping liquid and method for recovering tin |
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