CN105483727B - A kind of method of green oil film in removing useless circuit board - Google Patents
A kind of method of green oil film in removing useless circuit board Download PDFInfo
- Publication number
- CN105483727B CN105483727B CN201510901126.0A CN201510901126A CN105483727B CN 105483727 B CN105483727 B CN 105483727B CN 201510901126 A CN201510901126 A CN 201510901126A CN 105483727 B CN105483727 B CN 105483727B
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- CN
- China
- Prior art keywords
- circuit board
- oil film
- green oil
- useless circuit
- dilute alkaline
- 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.)
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Classifications
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/20—Other heavy metals
Abstract
The invention discloses a kind of methods for removing green oil film in circuit board.This method includes the following steps：After removing green oil film of the useless circuit board using dilute alkaline soln removing surface, it is rinsed with water.1m3This remover can remove 300 700m2Circuit board green oil film.The present invention solves the problems, such as removing green oil film of the individual layer useless circuit board in whole plate removal process, and operating process is simple and feasible, of low cost, is of great significance to environmental protection.
Description
Technical field
It is more particularly to a kind of to remove green oil film in useless circuit board the invention belongs to E-Waste recycling using technical field
Method.
Background technology
With electric equipment products production and scrap, the discarded amount of circuit board increases severely with day.It is returned in individual layer useless circuit board
During receipts, since its is simple in structure, recovery value is relatively small, if using conventional method " broken-sorting " or " broken
Broken-wet-leaching " is recycled, and shattering process not only needs to consume a large amount of electric energy increase costs, and the dust generated also can
It pollutes the environment.Therefore it is contemplated that direct whole plate recycling, but since circuit board copper surface covers one layer of green oil film, hinder
The leaching of copper in whole plate removal process, therefore find a kind of method of efficient removing green oil film and recycled as individual layer useless circuit board whole plate
Urgent problem to be solved in the process.
At present, the domestic research work about useless circuit board recycling has had important progress, has multinomial about useless
The patent of circuit board recovery technology.
Patent [200910009562.1] crushes useless circuit board, then recycles copper by the method for " sour corrosion-displacement "
And gold, to obtain the resource regeneration of valuable metal；Useless circuit board is crushed to 40-200 mesh by patent [201310292820.8], is used
Organic solvent dissolves bonding agent, then detaches metal and nonmetallic with high-pressure electrostatic；Patent [201110092620.9] using it is broken,
The methods of electrostatic separation, calcining, acidleach, realizes valuable metal resource regeneration.
Every technology that more than patent uses is required to recycle copper after useless circuit board is crushed, rare to useless circuit board at present
The research that whole plate directly recycles.
Invention content
The object of the present invention is to provide a kind of methods for removing green oil film in useless circuit board.
The method of green oil film, includes the following steps in removing useless circuit board provided by the invention：
After green oil film of the useless circuit board using dilute alkaline soln removing surface, it is rinsed with water.
In the above method, the dilute alkaline soln is selected from the aqueous solution and hydroxide of the aqueous solution of sodium hydroxide, potassium hydroxide
At least one of aqueous solution of lithium；
The mass percentage concentration of the dilute alkaline soln is 1%-10%, concretely 4%.
In the removing step, temperature is 80-120 DEG C, concretely 100 DEG C；
Time is 10min-20min, concretely 14min.
1m3The area of the corresponding useless circuit board of the dilute alkaline soln is 300-700m2。
The present invention solves the problems, such as removing green oil film of the individual layer useless circuit board in whole plate removal process, and operating process is easy
Feasible, of low cost, useless circuit board used is individual layer useless circuit board, without crushing, is of great significance to environmental protection.
Description of the drawings
Fig. 1 is the forward and backward schematic diagram of waste printed circuit board removing green oil film in the present invention；Before a is removing, after b is removing.
Specific embodiment
With reference to specific embodiment, the present invention is further elaborated, but the present invention is not limited to following embodiments.Institute
It is conventional method unless otherwise instructed to state method.The raw material can obtain unless otherwise instructed from open commercial sources.
Embodiment 1,
Choose 0.5m2Cathode-ray tube display individual layer useless circuit board is test material, and configuration 1L mass percentage concentrations are
The aqueous solution of 4% NaOH is heated to 100 DEG C in 2L beakers, and the useless circuit board of selection is cut into after fritter and is soaked in institute
In the NaOH solution of configuration, soaking time 14min then takes out and is rinsed with clear water.
Result of the test removes completely for the green oil film on all circuit boards, exposes copper foil layer, as shown in Figure 1, a is removing
Before, after b is removing.
Embodiment 2,
Choose 0.5m2Cathode-ray tube display individual layer useless circuit board is test material, and configuration 1L mass percentage concentrations are
The aqueous solution of 4% KOH is heated to 100 DEG C in 2L beakers, and the useless circuit board of selection is cut into after fritter to be soaked in and is matched
In the KOH solution put, soaking time 14min then takes out and is rinsed with clear water.
Result of the test removes completely for the green oil film on all circuit boards, exposes copper foil layer.
Embodiment 3,
Choose 0.5m2Cathode-ray tube display individual layer useless circuit board is test material, and configuration 1L mass percentage concentrations are
The aqueous solution of 4% LiOH is heated to 100 DEG C in 2L beakers, and the useless circuit board of selection is cut into after fritter and is soaked in institute
In the LiOH solution of configuration, soaking time 14min then takes out and is rinsed with clear water.
Result of the test removes completely for the green oil film on all circuit boards, exposes copper foil layer.
Claims (3)
1. a kind of method for removing green oil film in useless circuit board, includes the following steps：
After green oil film of the useless circuit board using dilute alkaline soln removing surface, it is rinsed with water；
In aqueous solution of the dilute alkaline soln selected from sodium hydroxide, the aqueous solution of potassium hydroxide and the aqueous solution of lithium hydroxide extremely
Few one kind；
The mass percentage concentration of the dilute alkaline soln is 1%-10%；
In the removing step, temperature is 80-120 DEG C；Time is 10min-20min.
2. according to the method described in claim 1, it is characterized in that：In the removing step, time 14min.
3. method according to claim 1 or 2, it is characterised in that：1m3The corresponding useless circuit board of the dilute alkaline soln
Area be 300-700m2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510901126.0A CN105483727B (en) | 2015-12-09 | 2015-12-09 | A kind of method of green oil film in removing useless circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510901126.0A CN105483727B (en) | 2015-12-09 | 2015-12-09 | A kind of method of green oil film in removing useless circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105483727A CN105483727A (en) | 2016-04-13 |
| CN105483727B true CN105483727B (en) | 2018-06-22 |
Family
ID=55670985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510901126.0A Active CN105483727B (en) | 2015-12-09 | 2015-12-09 | A kind of method of green oil film in removing useless circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105483727B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008146828A1 (en) * | 2007-05-29 | 2008-12-04 | Nakamura Choko Co., Ltd. | Method and apparatus for cleaning metal plate and spray nozzle for cleaning metal plate |
| CN101812591B (en) * | 2009-02-20 | 2012-04-04 | 国立云林科技大学 | Method for recovering gold, copper, copper sulfate and copper chloride waste liquid of waste circuit board |
| CN102094209A (en) * | 2009-12-14 | 2011-06-15 | 徐冰 | Surface treatment cleaning solution |
| CN102181644B (en) * | 2011-04-13 | 2012-12-19 | 深圳市格林美高新技术股份有限公司 | Method for reclaiming rare noble metals from waste circuit board |
| CN103397186B (en) * | 2013-07-12 | 2014-12-17 | 湖南省同力电子废弃物回收拆解利用有限公司 | Regenerating method and process for recycling rare precious metals from electronic wastes |
| CN104511851A (en) * | 2013-11-19 | 2015-04-15 | 东莞金太阳研磨股份有限公司 | PCB (printed circuit board) buffing wheel production method |
| CN104005039B (en) * | 2014-05-27 | 2016-05-18 | 滁州迪蒙德模具制造有限公司 | A kind of aluminum alloy mould cleaning agent and preparation method thereof |
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2015
- 2015-12-09 CN CN201510901126.0A patent/CN105483727B/en active Active
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| Publication number | Publication date |
|---|---|
| CN105483727A (en) | 2016-04-13 |
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