CN109972143A - A kind of cyclic regeneration device of alkaline etching liquid - Google Patents
A kind of cyclic regeneration device of alkaline etching liquid Download PDFInfo
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- CN109972143A CN109972143A CN201711454244.7A CN201711454244A CN109972143A CN 109972143 A CN109972143 A CN 109972143A CN 201711454244 A CN201711454244 A CN 201711454244A CN 109972143 A CN109972143 A CN 109972143A
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- liquid
- waste liquor
- alkaline etching
- regeneration device
- etching
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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
- C23F1/46—Regeneration of etching compositions
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
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Abstract
A kind of cyclic regeneration device of alkaline etching liquid, recycling storage system, extracting system and electrolytic cell including sequential connection, the recycling storage system include etching waste liquor slot, regeneration liquid bath and regenerated liquid blend tank;The extracting system includes copper extraction separator and back extraction separator, the copper extraction separator is connected to the etching waste liquor slot, copper ion in the copper extraction separator is stripped into sulfuric acid solution by the back extraction separator with sulfuric acid, and the solution after the back extraction is delivered to the electrolytic cell as electrolyte.Using the cyclic regeneration device and method of alkaline etching liquid provided by the invention, the recycling to etching waste liquor may be implemented, utilization rate can achieve 98% or more, thus greatly reduce the discharge of PCB enterprise pollution waste.
Description
Technical field
The present invention relates to printed circuit boards to etch field, and in particular to a kind of circulation of printed circuit board alkaline etching liquid is again
Generating apparatus.
Background technique
Printed circuit board is the basis of electronics and information industry, and advanced sci-tech product all be unable to do without printed circuit board.Due to
Printed circuit board generates a large amount of etching waste liquor in etching process procedure, wherein containing a large amount of environmentally harmful ingredients, such as
Copper ion etc..It therefore, is always the problem of perplexing enterprise to the processing of spent etching solution.
Summary of the invention
Technical purpose of the invention is to provide the cyclic regeneration device and method of a kind of alkaline etching liquid.
Technical purpose of the invention is achieved through the following technical solutions:
A kind of cyclic regeneration device of alkaline etching liquid, recycling storage system and extracting system including connection, the circulation storage
Deposit system includes etching waste liquor slot, regeneration liquid bath and regenerated liquid blend tank, for keeping in and recycling alkaline etching waste liquid for producing and alkalinity
Etch regenerated liquid;The regeneration liquid bath is connected to alkali etching line (SES line), and regenerated liquid is used for etch process, while by SES
Line is connected to the etching waste liquor slot, and the etching waste liquor of generation is collected into etching waste liquor slot；The extracting system includes connecting
Logical copper extraction separator and back extraction separator, the copper extraction separator is connected to the etching waste liquor slot, by the erosion of cupric
Waste liquid is carved in copper extraction separator by organic extractant solution and liquid separation；The copper extraction separator and regenerated liquid blend tank connect
It is logical, the etching waste liquor after liquid separation is delivered in regenerated liquid blend tank；The regenerated liquid blend tank and the etching waste liquor slot connect
It is logical, it is transported to after being deployed to etching waste liquor in etching waste liquor slot.
Preferably, the cyclic regeneration device of the alkaline etching liquid further includes being used to prepare electrolytic copper foil electrolytic cell, described
Electrolytic cell is connected to the back extraction separator.
Preferably, it is connected between the recycling storage system, extracting system and electrolytic cell, each system and device are between any two
It is controlled by high-pressure pump.
It preferably, further include level sensor in the recycling storage system, the level sensor is located at the regeneration
In liquid bath, after liquid level therein is reduced to certain altitude, the level sensor control will be in the regenerated liquid blend tank
Regenerated liquid, which injects in the regeneration liquid bath, temporarily to be stored.
It preferably, further include specific gravity control instrument in the recycling storage system, the specific gravity control instrument is located at the regeneration
In liquid bath, the specific gravity control instrument is used to control the addition specific gravity of the regenerated liquid.
It preferably, include agitating device in the regeneration liquid bath, for the solution regenerated in liquid bath to be uniformly mixed.
Preferably, the extracting system further includes extractant storage tank, is obtained for recycling liquid separation in the copper extraction separator
The extractant arrived, and re-applied in extraction step, to save the dosage of extractant, reduce industrial cost.
Preferably, there is anode and cathode, the anode is graphite plate, and the cathode is stainless steel in the electrolytic cell
Plate.
Preferably, the stainless steel plate is 316 stainless steel plates.
Preferably, the cyclic regeneration device of the alkaline etching liquid is connected with PLC automatic control system.
The circulation regeneration method of alkaline etching liquid provided by the invention is realized by above-mentioned apparatus using following steps:
S1: the regeneration etching solution regenerated in liquid bath is delivered to alkali etching line (SES) and is etched, then by the useless erosion of generation
Liquid is collected into etching waste liquor slot；
S2: useless erosion liquid is delivered in copper extraction separator from etching waste liquor slot, with copper extractant separation and collection copper ion；
S3: by useless erosion liquid and extractant liquid separation after extraction, useless erosion liquid being collected into regenerated liquid blend tank, deploys the dense of useless erosion liquid
Degree is delivered to again in regeneration liquid bath；
S4: copper extractant is delivered in back extraction separator, with sulfuric acid solution back extraction copper ion and liquid separation, prepares cupric
Liquid is in order to handling discarded copper ion.
Preferably, it when the specific gravity in regeneration liquid bath described in step S1 exceeds threshold value, is automatically controlled by specific gravity control instrument
The addition of solution in regenerated liquid blend tank.
Preferably, dispensing mode described in step S3 are as follows: erosion plate salt, liquefied ammonia and alkalinity are added into regenerated liquid blend tank
Additive is etched, for adjusting the pH and each component content of solution.
Preferably, the allotment parameter of regenerated liquid described in step S3 are as follows: the useless erosion liquid of 1000L need to add ammonium chloride 35kg,
Liquefied ammonia (10%) 160L and alkali etching additive 3L.
It preferably, further include being stirred to the solution in regeneration liquid bath, keeping solution uniform in step S1.
Preferably, in step S3 further include: cupric organic solution extracted is delivered in back extraction separator and uses sulfuric acid
It is stripped, and liquid separation, respectively obtains extractant and sulfate liquor.
Preferably, in step S4 further include: the sub- liquor of cupric is delivered in electrolytic cell as electrolyte, passes through electrolysis
Prepare copper sheet.
Preferably, in the electrolytic process in step S4, using direct current energization action, controlling liquid temperature is 35-45 DEG C, electricity
Electrolyte keeps copper ion 20-30g/L when solution, and the total volume holding of electrolyte is basically unchanged.
Preferably, in step S4 further include: be delivered to remaining extractant in back extraction separator in extractant storage tank temporarily
When store, be delivered in copper extraction separator again after washing, be used for extraction process, realization extractant is recycled, save
About cost.
Preferably, the production method further includes S5: by the solution after electrolysis be delivered in PCB waste liquid integrated treatment tower into
Row processing.
Using the cyclic regeneration device and method of alkaline etching liquid provided by the invention, may be implemented to follow etching waste liquor
Ring regeneration, utilization rate can achieve 98% or more, thus greatly reduce the discharge of PCB enterprise pollution waste；And obtain
Product is electrolytic copper plate, and copper content can achieve 99.5%.The alkaline etching liquid performance that the device and method provides is stablized, can
To meet the etching production requirement of PCB enterprise, help PCB enterprise that production and operation cost is greatly lowered.Dress provided by the invention
Set that structure is simple, the process of installation and debugging does not influence enterprise and normally produces, and runs operating process and can be realized automation control.
Detailed description of the invention
Fig. 1 is the cyclic regeneration device structural schematic diagram of alkaline etching liquid provided by the invention.
Specific embodiment
The following detailed description of the cyclic regeneration device of alkaline etching liquid provided by the invention.
Referring to Fig.1, the cyclic regeneration device 10 of a kind of alkaline etching liquid, recycling storage system and extraction system including connection
System, the recycling storage system include etching waste liquor slot 110, regeneration liquid bath 111 and regenerated liquid blend tank 112, for temporary and
Recycle alkaline etching waste liquid for producing and alkali etching regenerated liquid;The regeneration liquid bath 111 is connected to alkali etching line (SES line) 20, will
Regenerated liquid is used for etch process, while SES line 20 being connected to the etching waste liquor slot 110, and the etching waste liquor of generation is collected
Into etching waste liquor slot 110；The extracting system includes the copper extraction separator 121 and back extraction separator 122 of connection, the copper
Extraction separator 121 is connected to the etching waste liquor slot 110, and the etching waste liquor of cupric is had in copper extraction separator 121
The extraction of machine solution and liquid separation；The copper extraction separator 121 is connected to regenerated liquid blend tank 112, by the etching waste liquor after liquid separation
It is delivered in regenerated liquid blend tank 112；The regenerated liquid blend tank 112 is connected to the etching waste liquor slot 110, to etching waste liquor
It is transported to after being deployed in etching waste liquor slot.
The cyclic regeneration device 10 of the alkaline etching liquid further includes being used to prepare electrolytic copper foil electrolytic cell 13, the electrolysis
Slot 13 is connected to the back extraction separator 122.
It is connected between the recycling storage system, extracting system and electrolytic cell 13, each system and device pass through between any two
High-pressure pump control.
It further include level sensor in the recycling storage system, the level sensor is located at the regeneration liquid bath 111,
After liquid level therein is reduced to certain altitude, the level sensor is controlled the regeneration in the regenerated liquid blend tank 112
Liquid, which injects in the regeneration liquid bath 111, temporarily to be stored.
It further include specific gravity control instrument in the recycling storage system, the specific gravity control instrument is located at the regeneration liquid bath 111
In, the specific gravity control instrument is used to control the addition specific gravity of the regenerated liquid.
It include agitating device in the regeneration liquid bath 111, for the solution regenerated in liquid bath to be uniformly mixed.
The extracting system further includes extractant storage tank 123, is obtained for recycling liquid separation in the copper extraction separator
Extractant, and re-applied in extraction step, to save the dosage of extractant, reduce industrial cost.
There is anode and cathode, the anode is graphite plate, and the cathode is stainless steel plate in the electrolytic cell 13.
The stainless steel plate is 316 stainless steel plates.
The electrolytic cell 13 is connected to PCB liquid waste processing tower 14, for focusing on discarded electrolyte.
The cyclic regeneration device 10 of the alkaline etching liquid is connected with PLC automatic control system.
The circulation regeneration method of alkaline etching liquid provided by the invention is realized by above-mentioned apparatus using following steps:
S1: the regeneration etching solution regenerated in liquid bath is delivered to alkali etching line (SES) and is etched, then by the useless erosion of generation
Liquid is collected into etching waste liquor slot；
S2: useless erosion liquid is delivered in copper extraction separator from etching waste liquor slot, with copper extractant separation and collection copper ion；
S3: by useless erosion liquid and extractant liquid separation after extraction, useless erosion liquid being collected into regenerated liquid blend tank, deploys the dense of useless erosion liquid
Degree is delivered to again in regeneration liquid bath；
S4: copper extractant is delivered in back extraction separator, with sulfuric acid solution back extraction copper ion and liquid separation, prepares cupric
Liquid is in order to handling discarded copper ion；
Preferably, it when the specific gravity in regeneration liquid bath described in step S1 exceeds threshold value, is automatically controlled and is regenerated by specific gravity control instrument
The addition of solution in liquid blend tank.
Preferably, dispensing mode described in step S3 are as follows: erosion plate salt, liquefied ammonia and alkalinity are added into regenerated liquid blend tank
Additive is etched, for adjusting the pH and each component content of solution.
Preferably, the allotment parameter of regenerated liquid described in step S3 are as follows: the useless erosion liquid of 1000L need to add ammonium chloride 35kg,
Liquefied ammonia (10%) 160L and alkali etching additive 3L.
It preferably, further include being stirred to the solution in regeneration liquid bath, keeping solution uniform in step S1.
Preferably, in step S3 further include: cupric organic solution extracted is delivered in back extraction separator and uses sulfuric acid
It is stripped, and liquid separation, respectively obtains extractant and sulfate liquor.
Preferably, in step S4 further include: the sub- liquor of cupric is delivered in electrolytic cell as electrolyte, passes through electrolysis
Prepare copper sheet.
Preferably, in the electrolytic process in step S4, using direct current energization action, controlling liquid temperature is 35-45 DEG C, electricity
Electrolyte keeps copper ion 20-30g/L when solution, and the total volume holding of electrolyte is basically unchanged.
Preferably, in step S4 further include: be delivered to remaining extractant in back extraction separator in extractant storage tank temporarily
When store, be delivered in copper extraction separator again after washing, be used for extraction process, realization extractant is recycled, save
About cost.
Preferably, the production method further includes S5: by the solution after electrolysis be delivered in PCB waste liquid integrated treatment tower into
Row processing.
Using the cyclic regeneration device and method of alkaline etching liquid provided by the invention, may be implemented to the circulation of etching waste liquor again
It makes profits use, utilization rate can achieve 98% or more, thus greatly reduce the discharge of PCB enterprise pollution waste；And obtained product
For electrolytic copper plate, copper content can achieve 99.5%.The alkaline etching liquid performance that the device and method provides is stablized, Ke Yiman
The etching production requirement of sufficient PCB enterprise helps PCB enterprise that production and operation cost is greatly lowered.Device knot provided by the invention
Structure is simple, and the process of installation and debugging does not influence enterprise and normally produces, and runs operating process and can be realized automation control.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to of the invention
Some modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specification
Some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.
Claims (9)
1. a kind of cyclic regeneration device of alkaline etching liquid includes the recycling storage system and extracting system of connection, the circulation storage
Deposit system includes etching waste liquor slot, regeneration liquid bath and regenerated liquid blend tank, and the regeneration liquid bath and alkali etching line (SES line) are even
It is logical, SES line is connected to the etching waste liquor slot；The extracting system includes copper extraction separator and the back extraction separation of connection
Device, the copper extraction separator are connected to the etching waste liquor slot；The copper extraction separator is connected to regenerated liquid blend tank, will
Etching waste liquor after liquid separation is delivered in regenerated liquid blend tank；The regenerated liquid blend tank is connected to the etching waste liquor slot, right
Etching waste liquor is transported to progress SES Wiring technology in etching waste liquor slot after being deployed.
2. the cyclic regeneration device of alkaline etching liquid according to claim 1, which is characterized in that the alkaline etching liquid
Cyclic regeneration device further includes electrolytic cell, and the electrolytic cell is connected to the back extraction separator.
3. the cyclic regeneration device of alkaline etching liquid according to claim 2, which is characterized in that the recycling storage system
It is connected between system, extracting system and electrolytic cell, each system and device pass through high-pressure pump control between any two.
4. the cyclic regeneration device of alkaline etching liquid according to claim 1, which is characterized in that the recycling storage system
In further include level sensor, the level sensor is located in the regeneration liquid bath.
5. the cyclic regeneration device of alkaline etching liquid according to claim 1, which is characterized in that the recycling storage system
In further include specific gravity control instrument, the specific gravity control instrument is located in the regeneration liquid bath.
6. the cyclic regeneration device of alkaline etching liquid according to claim 1, which is characterized in that set in the regeneration liquid bath
There is agitating device.
7. the cyclic regeneration device of alkaline etching liquid according to claim 1, which is characterized in that the extracting system also wraps
Extractant storage tank is included, for recycling the extractant that liquid separation obtains in the copper extraction separator.
8. the cyclic regeneration device of alkaline etching liquid according to claim 2, which is characterized in that have in the electrolytic cell
Anode and cathode, the anode are graphite plate, and the cathode is stainless steel plate.
9. the cyclic regeneration device of alkaline etching liquid according to claim 1, which is characterized in that the alkaline etching liquid
Cyclic regeneration device is connected with PLC automatic control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711454244.7A CN109972143A (en) | 2017-12-28 | 2017-12-28 | A kind of cyclic regeneration device of alkaline etching liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711454244.7A CN109972143A (en) | 2017-12-28 | 2017-12-28 | A kind of cyclic regeneration device of alkaline etching liquid |
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| CN109972143A true CN109972143A (en) | 2019-07-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112663065A (en) * | 2020-11-24 | 2021-04-16 | 苏州美源达环保科技股份有限公司 | Regeneration and recycling method of alkaline etching solution |
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- 2017-12-28 CN CN201711454244.7A patent/CN109972143A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112663065A (en) * | 2020-11-24 | 2021-04-16 | 苏州美源达环保科技股份有限公司 | Regeneration and recycling method of alkaline etching solution |
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Application publication date: 20190705 |