CN107662988A - A kind of processing method of acidic etching waste liquid - Google Patents
A kind of processing method of acidic etching waste liquid Download PDFInfo
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- CN107662988A CN107662988A CN201610615773.XA CN201610615773A CN107662988A CN 107662988 A CN107662988 A CN 107662988A CN 201610615773 A CN201610615773 A CN 201610615773A CN 107662988 A CN107662988 A CN 107662988A
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- Prior art keywords
- waste liquid
- cupric
- acidic etching
- electrolysis
- processing method
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C25C1/12—Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Manufacturing Of Printed Circuit Boards (AREA)
- ing And Chemical Polishing (AREA)
Abstract
The present invention provides a kind of processing method of cupric acidic etching waste liquid, obtains cupric oxide by acid-base neutralization first, after cupric oxide washing impurity-removing, add in cupric micro-etched waste liquid, copper sulfate electrolyte is obtained, re-electrolysis is carried out to copper sulfate electrolyte, liquid waste processing is completed.The processing method of the cupric acidic etching waste liquid of the present invention, technique is simple, easy to operate, the cupric acidic etching waste liquid and cupric micro-etched waste liquid of printed circuit board industry have been handled simultaneously, Cu in waste water ion concentration after processing is ppm levels, meets discharging standards, avoids the pollution to environment.Meanwhile recovery has obtained the metallic copper of high-purity, can be used as the raw material of printed circuit board industry, have good economic benefit and social benefit.
Description
Technical field
The present invention relates to a kind of method for treating waste liquid, and in particular to a kind of processing method of acidic etching waste liquid.
Background technology
In recent years, the electronics industry fast development in China, basic link of the printed circuit board industry as electronics industry, closely
Faster growth rate is also always maintained at over year.When making printed circuit board (PCB), it is necessary to consume a large amount of copper, while also produce big
The copper-containing etching waste solution of amount.Contained waste liquid, which directly discharges, can cause great environmental pollution, and human body is transferred to by plant and water
Interior, excessive copper can cause people to lose physiological function with poisoning by enzyme occurs in human body.Therefore, printed circuit board industry contains
Copper waste etching solution needs timely and effectively to be cleared up.
The content of the invention
The present invention provides a kind of processing method of cupric acidic etching waste liquid, passes through acid-base neutralization, washing impurity-removing, electrolyte
Prepare and the processing step of electrolysis, the cupric acidic etching waste liquid and cupric microetch for effectively having handled printed circuit board industry give up
Liquid, the waste liquid after processing can be discharged directly, and obtain the metallic copper of high-purity.
In order to realize above-mentioned technical purpose, the present invention uses following technical scheme.
A kind of processing method of cupric acidic etching waste liquid, is followed the steps below：
Step 1: acid-base neutralization：
Cupric acidic etching waste liquid is filtered to remove solid impurity, filtrate is slowly added to weight/mass percentage composition as 30~40%
Liquid caustic soda in, stirring, control temperature to adjust pH value to 8~9, obtain mixed liquor for 50~60 DEG C.
Step 2: washing impurity-removing：
By the mixed liquor press filtration of step 1, filter cake is washed, and tests the electrical conductivity of wash water, until the electrical conductivity of wash water≤
0.1ms/m, obtain cupric oxide.
Step 3: prepared by electrolyte：
The cupric oxide that step 2 is obtained is added to the cupric micro-etched waste liquid that solid impurity is removed by filtration, and stirs 1~2h,
To cupric oxide all dissolving, copper sulfate electrolyte is obtained.
Step 4: electrolysis：
The copper sulfate electrolyte of step 3 is electrolysed, current density is 2.0~3.0ASD, and electrolysis temperature is 40~50
DEG C, the copper ion concentration tested in electrolytic process in electrolyte, when the copper ion concentration in liquid to be electrolysed is less than 8g/L, progress two
Secondary electrolysis, re-electrolysis current density are 0.5~1.0ASD, and re-electrolysis temperature is 60~70 DEG C, obtain metallic copper, waste liquid warp
Detect qualified rear discharge.
Further, a kind of processing method of cupric acidic etching waste liquid, in step 1, the weight/mass percentage composition of liquid caustic soda is
40%.
Further, a kind of processing method of cupric acidic etching waste liquid, in step 1, the temperature is 60 DEG C.
Further, a kind of processing method of cupric acidic etching waste liquid, step 4, when being electrolysed copper sulphate, the electric current
Density is 3.0ASD, and electrolysis temperature is 50 DEG C, and the re-electrolysis current density is 1.0ASD, and re-electrolysis temperature is 70 DEG C.
The present invention uses above-mentioned technical proposal, and the beneficial effect of acquirement is：
1. the processing method of cupric acidic etching waste liquid provided by the invention, technique is simple, easy to operate, while handles
The cupric acidic etching waste liquid and cupric micro-etched waste liquid of printed circuit board industry, the Cu in waste water ion concentration after processing are ppm
Level, meets discharging standards, avoids the pollution to environment.
2. the processing method of cupric acidic etching waste liquid provided by the invention, while liquid waste processing, recovery obtains
It the metallic copper of high-purity, can be used as the raw material of printed circuit board industry, there is good economic benefit and social benefit.
Embodiment
The technical scheme of the processing method of the cupric acidic etching waste liquid of the present invention is further described below, made
Those skilled in the art can be better understood from the present invention and can be practiced.
Embodiment 1
A kind of processing method of cupric acidic etching waste liquid, is followed the steps below：
Step 1: acid-base neutralization：
Cupric acidic etching waste liquid is filtered to remove solid impurity, filtrate is slowly added to the liquid that weight/mass percentage composition is 30%
In alkali, stirring, it is 60 DEG C to control temperature, and pH value is adjusted to 9, obtains mixed liquor.
Step 2: washing impurity-removing：
By the mixed liquor press filtration of step 1, filter cake is washed, and tests the electrical conductivity of wash water, until the electrical conductivity of wash water≤
0.1ms/m, obtain cupric oxide.
Step 3: prepared by electrolyte：
The cupric oxide that step 2 is obtained is added to the cupric micro-etched waste liquid that solid impurity is removed by filtration, and stirs 1~2h,
To cupric oxide all dissolving, copper sulfate electrolyte is obtained.
Step 4: electrolysis：
The copper sulfate electrolyte of step 3 is electrolysed, current density 2.0ASD, electrolysis temperature is 50 DEG C, is electrolysed
The copper ion concentration tested in journey in electrolyte, when the copper ion concentration in liquid to be electrolysed is less than 8g/L, progress re-electrolysis, two
Secondary electrolytic current density is 0.5ASD, and re-electrolysis temperature is 70 DEG C, obtains metallic copper, waste liquid qualified rear discharge after testing.
Embodiment 2
A kind of processing method of cupric acidic etching waste liquid, is followed the steps below：
Step 1: acid-base neutralization：
Cupric acidic etching waste liquid is filtered to remove solid impurity, filtrate is slowly added to the liquid that weight/mass percentage composition is 40%
In alkali, stirring, it is 50 DEG C to control temperature, and pH value is adjusted to 8, obtains mixed liquor.
Step 2: washing impurity-removing：
By the mixed liquor press filtration of step 1, filter cake is washed, and tests the electrical conductivity of wash water, until the electrical conductivity of wash water≤
0.1ms/m, obtain cupric oxide.
Step 3: prepared by electrolyte：
The cupric oxide that step 2 is obtained is added to the cupric micro-etched waste liquid that solid impurity is removed by filtration, and stirs 1~2h,
To cupric oxide all dissolving, copper sulfate electrolyte is obtained.
Step 4: electrolysis：
The copper sulfate electrolyte of step 3 is electrolysed, current density 3.0ASD, electrolysis temperature is 40 DEG C, is electrolysed
The copper ion concentration tested in journey in electrolyte, when the copper ion concentration in liquid to be electrolysed is less than 8g/L, progress re-electrolysis, two
Secondary electrolytic current density is 1.0ASD, and re-electrolysis temperature is 60 DEG C, obtains metallic copper, waste liquid qualified rear discharge after testing.
Embodiment 3
A kind of processing method of cupric acidic etching waste liquid, is followed the steps below：
Step 1: acid-base neutralization：
Cupric acidic etching waste liquid is filtered to remove solid impurity, filtrate is slowly added to the liquid that weight/mass percentage composition is 40%
In alkali, stirring, it is 60 DEG C to control temperature, and pH value is adjusted to 9, obtains mixed liquor.
Step 2: washing impurity-removing：
By the mixed liquor press filtration of step 1, filter cake is washed, and tests the electrical conductivity of wash water, until the electrical conductivity of wash water≤
0.1ms/m, obtain cupric oxide.
Step 3: prepared by electrolyte：
The cupric oxide that step 2 is obtained is added to the cupric micro-etched waste liquid that solid impurity is removed by filtration, and stirs 1~2h,
To cupric oxide all dissolving, copper sulfate electrolyte is obtained.
Step 4: electrolysis：
The copper sulfate electrolyte of step 3 is electrolysed, current density 3.0ASD, electrolysis temperature is 50 DEG C, is electrolysed
The copper ion concentration tested in journey in electrolyte, when the copper ion concentration in liquid to be electrolysed is less than 8g/L, progress re-electrolysis, two
Secondary electrolytic current density is 1.0ASD, and re-electrolysis temperature is 70 DEG C, obtains metallic copper, waste liquid qualified rear discharge after testing.
The processing method of cupric acidic etching waste liquid provided by the invention, is not restricted to the described embodiments, every utilization
The thinking of the present invention, by the formed technical scheme that converts and replace, all within the scope of the present invention.
Claims (4)
- A kind of 1. processing method of cupric acidic etching waste liquid, it is characterised in that：Comprise the following steps,Step 1: acid-base neutralization：Cupric acidic etching waste liquid is filtered to remove solid impurity, filtrate is slowly added to the liquid that weight/mass percentage composition is 30~40% In alkali, stirring, it is 50~60 DEG C to control temperature, and pH value is adjusted to 8~9, obtains mixed liquor；Step 2: washing impurity-removing：By the mixed liquor press filtration of step 1, filter cake is washed, and tests the electrical conductivity of wash water, until electrical conductivity≤0.1ms/m of wash water, Obtain cupric oxide；Step 3: prepared by electrolyte：The cupric oxide that step 2 is obtained is added in the cupric micro-etched waste liquid that solid impurity is removed by filtration, and stirs 1~2h, extremely Cupric oxide all after dissolving, obtains copper sulfate electrolyte；Step 4: electrolysis：The copper sulfate electrolyte of step 3 is electrolysed, current density is 2.0~3.0ASD, and electrolysis temperature is 40~50 DEG C, The copper ion concentration tested in electrolytic process in electrolyte, when the copper ion concentration in liquid to be electrolysed is less than 8g/L, progress is secondary Electrolysis, re-electrolysis current density are 0.5~1.0ASD, and re-electrolysis temperature is 60~70 DEG C, obtain metallic copper, waste liquid is through inspection Survey qualified rear discharge.
- 2. the processing method of cupric acidic etching waste liquid according to claim 1, it is characterised in that：It is described in step 1 The weight/mass percentage composition of liquid caustic soda is 40%.
- 3. the processing method of cupric acidic etching waste liquid according to claim 1, it is characterised in that：It is described in step 1 Temperature is 60 DEG C.
- 4. the processing method of cupric acidic etching waste liquid according to claim 1, it is characterised in that：Step 4, it is electrolysed sulphur During sour copper, the current density is 3.0ASD, and electrolysis temperature is 50 DEG C, and the re-electrolysis current density is 1.0ASD, secondary Electrolysis temperature is 70 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610615773.XA CN107662988A (en) | 2016-07-30 | 2016-07-30 | A kind of processing method of acidic etching waste liquid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610615773.XA CN107662988A (en) | 2016-07-30 | 2016-07-30 | A kind of processing method of acidic etching waste liquid |
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| CN107662988A true CN107662988A (en) | 2018-02-06 |
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| CN201610615773.XA Pending CN107662988A (en) | 2016-07-30 | 2016-07-30 | A kind of processing method of acidic etching waste liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925026A (en) * | 2020-07-03 | 2020-11-13 | 昆山中环实业有限公司 | Treatment process of acidic copper-containing etching waste liquid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW453138B (en) * | 1999-06-17 | 2001-09-01 | Chen Guo Jin | Total recycle treatment of acidic copper etching waste liquid of printed circuit board |
| US20010051103A1 (en) * | 2000-05-30 | 2001-12-13 | Seo Kyu Bum | Preparation of highly pure copper oxide from waste etchant |
| CN101935062A (en) * | 2010-09-02 | 2011-01-05 | 昆山联鼎环保科技有限公司 | Method for preparing high-purity copper oxide by adopting acidic etching waste liquor |
| CN102303917A (en) * | 2011-08-25 | 2012-01-04 | 石祥阁 | Method for mixed treatment of waste liquid from acid etching and micro etching of printed circuit boards |
| WO2013176111A1 (en) * | 2012-05-24 | 2013-11-28 | 水ｉｎｇ株式会社 | Processing method and apparatus for copper chloride-containing acidic waste liquids |
-
2016
- 2016-07-30 CN CN201610615773.XA patent/CN107662988A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW453138B (en) * | 1999-06-17 | 2001-09-01 | Chen Guo Jin | Total recycle treatment of acidic copper etching waste liquid of printed circuit board |
| US20010051103A1 (en) * | 2000-05-30 | 2001-12-13 | Seo Kyu Bum | Preparation of highly pure copper oxide from waste etchant |
| CN101935062A (en) * | 2010-09-02 | 2011-01-05 | 昆山联鼎环保科技有限公司 | Method for preparing high-purity copper oxide by adopting acidic etching waste liquor |
| CN102303917A (en) * | 2011-08-25 | 2012-01-04 | 石祥阁 | Method for mixed treatment of waste liquid from acid etching and micro etching of printed circuit boards |
| WO2013176111A1 (en) * | 2012-05-24 | 2013-11-28 | 水ｉｎｇ株式会社 | Processing method and apparatus for copper chloride-containing acidic waste liquids |
Non-Patent Citations (1)
| Title |
|---|
| 吴阳东等: "PCB酸蚀刻废液制备氧化铜及后续废水处理条件研究", 《广东科技》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925026A (en) * | 2020-07-03 | 2020-11-13 | 昆山中环实业有限公司 | Treatment process of acidic copper-containing etching waste liquid |
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