CN1912154A - Method for decoating on waste plastic metal - Google Patents
Method for decoating on waste plastic metal Download PDFInfo
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- CN1912154A CN1912154A CNA2006100862013A CN200610086201A CN1912154A CN 1912154 A CN1912154 A CN 1912154A CN A2006100862013 A CNA2006100862013 A CN A2006100862013A CN 200610086201 A CN200610086201 A CN 200610086201A CN 1912154 A CN1912154 A CN 1912154A
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- plating
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- take
- plastic waste
- copper sulfate
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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
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Abstract
The invention relates to a recycle method for waste metal. It includes the following steps: under plenty air situation, using hydrochloric acid to process waste plastic metal plate to make chlorination salt of copper, nickel and chrome, adding vitriol to make sulfate that would be easily crystallized to copper sulfate, nickel sulfate, etc, taking separation; the processed waste plastic would be made to plastic particle after washing. The solution in process would be circularly used. And there is no waste water to exhaust. The invention has the advantages of low cost, no pollution and high economic and social benefits.
Description
Technical field
The present invention relates to a kind of recovery method of waste metal, particularly a kind of electroplating method that takes off of in containing the plastic waste of metal plating, recycling plastic waste and metal simultaneously.
Background technology
Its recycling more and more obtains people's attention to plastic waste as a kind of renewable resources at present, but some contain the etch that is mainly that the recovery of the plastic waste of metal plating (mainly being metals such as copper, nickel, chromium) adopts, after the metal plating that is about to the plastic waste surface will erode, make plastic pellet after residual plastic cleaned and utilize again.Domestic treatment process is mainly iron trichloride and hydrochloric acid hydrogen peroxide pickling process.The plastic waste that is about to contain metal plating drops in the reaction tank of above-mentioned solution dipping for some time and treats that its coating corrodes the back fully and takes out to wash and make plastic grain again.Aforesaid method treatment of waste plastics metal plating cost height, and from waste liquid, to reclaim comparatively difficulty of valuable metal (as copper, nickel, chromium etc.) again, the cost recovery height also has discharging of waste liquid, and environmental pollution is serious.
Summary of the invention
The objective of the invention is defective at the plastic waste method of aforementioned processing containing metal coating, design a kind of can the effective recycling plastic waste and the valuable metal that contains and do not have environmental pollution the plastic waste metal plating take off electroplating method.
The technical scheme that realizes above-mentioned purpose is as follows: the plastic waste metal plating take off electroplating method, it is characterized by: comprise the steps,
A puts into the plastic waste that mainly contains metallic copper, nickel, chromium coating in the raw material salt acid solution, charge into air simultaneously, and hydrochloric acid and metal plating are fully reacted, and generation contains the plastics after the taking off plating liquor and taking off plating of cupric chloride, nickelous chloride and chromium chloride;
B with the taking off plating bath and take off the plating plastics and separate of aforementioned generation, will take off the plating plastics and reclaim behind washing and drying;
C, taking off after separating in the b step added sulfuric acid in the plating bath, sulfuric acid generates copper sulfate, single nickel salt and hydrochloric acid with the metal chlorate reaction of taking off in the plating bath, with reacted mixed solution crystallisation by cooling, obtain copper sulfate, single nickel salt crystallization, obtain copper sulfate, single nickel salt product and contain little metal ionic hydrochloric acid soln after separating after filtration again.
Further, isolated taking off in the raw material salt acid solution that plating bath joins described a step after the aforementioned b step recycled.
Again further, the little metal ionic hydrochloric acid soln that contains that produces after the aforementioned c step is recycled as the plating bath that takes off in the aforementioned b step.
After plating plastics recovery, taking off after the aforementioned b step make plastic pellet.
Copper sulfate, the single nickel salt product that generates after the described c step carried out exquisiteness separate, obtain copper sulfate and single nickel salt product respectively.
In the technical solution of the present invention, under aerobic situation (air abundance),, make the chlorate solution of its production of copper, nickel, chromium with salt acid treatment metal plating, adding sulfuric acid again generates vitriol and makes it be easy to crystallization to be the higher copper sulfate of economic worth, single nickel salt etc., it to be separated again.And the plastic waste after handling is made plastic pellet after cleaning again.Solution in treating processes all can be recycled, and does not have discharging of waste liquid, does not pollute the environment.Therefore advantage of the present invention is a cost low (only for traditional treatment method such as tri-chlorination iron processes about 20%), pollution-free and can each composition of plastic waste of containing metal coating effectively be utilized economic benefit and obvious social benefit.
Description of drawings
Fig. 1 is the process route chart of the specific embodiment of the invention.
Embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention.
Put into the plastic waste that mainly contains metallic copper, nickel, chromium coating in the raw material salt acid solution, charge into air simultaneously, hydrochloric acid and metal plating are fully reacted, generation contains the plastics after the taking off plating liquor and taking off plating of cupric chloride, nickelous chloride and chromium chloride; Take off plating bath and take off the plating plastics and separate what produce, will take off the plating plastics and behind washing and drying, reclaim and make plastic pellet; Taking off after separation adds sulfuric acid in the plating bath, sulfuric acid generates copper sulfate, single nickel salt and hydrochloric acid with the metal chlorate reaction of taking off in the plating bath, with reacted mixed solution crystallisation by cooling, obtain copper sulfate, single nickel salt crystallization, obtain copper sulfate, single nickel salt product and contain little metal ionic hydrochloric acid soln after separating after filtration again, again copper sulfate, the single nickel salt product that generates carried out exquisiteness and separate, obtain copper sulfate and single nickel salt product respectively.
The aforementioned isolated little metal ionic hydrochloric acid soln that contains that takes off plating bath and add that the sulfuric acid afterreaction produces all can be used as the raw material salt acid solution and recycles.Certainly, have little metal ionic hydrochloric acid soln and also can add the rate of recovery that sulfuric acid further produces metal sulfate raising metal again.
Claims (5)
1, the plastic waste metal plating take off electroplating method, it is characterized by: comprise the steps,
A puts into the plastic waste that mainly contains metallic copper, nickel, chromium coating in the raw material salt acid solution, charge into air simultaneously, and hydrochloric acid and metal plating are fully reacted, and generation contains the plastics after the taking off plating liquor and taking off plating of cupric chloride, nickelous chloride and chromium chloride;
B with the taking off plating bath and take off the plating plastics and separate of aforementioned generation, will take off the plating plastics and reclaim behind washing and drying;
C, taking off after separating in the b step added sulfuric acid in the plating bath, sulfuric acid generates copper sulfate, single nickel salt and hydrochloric acid with the metal chlorate reaction of taking off in the plating bath, with reacted mixed solution crystallisation by cooling, obtain copper sulfate, single nickel salt crystallization, obtain copper sulfate, single nickel salt product and contain little metal ionic hydrochloric acid soln after separating after filtration again.
2, plastic waste metal plating according to claim 1 take off electroplating method, it is characterized by: isolated taking off in the raw material salt acid solution that plating bath joins described a step after the aforementioned b step recycled.
3, plastic waste metal plating according to claim 1 take off electroplating method, it is characterized by: the little metal ionic hydrochloric acid soln that contains that produces after the aforementioned c step is recycled as the plating bath that takes off in the aforementioned b step.
4, plastic waste metal plating according to claim 1 take off electroplating method, it is characterized by: after the described b step taking off the plating plastics recovery after make plastic pellet.
5, plastic waste metal plating according to claim 1 take off electroplating method, it is characterized by: copper sulfate, the single nickel salt product that generates after the described c step carried out exquisiteness separate, obtain copper sulfate and single nickel salt product respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100862013A CN100386453C (en) | 2006-08-18 | 2006-08-18 | Method for decoating on waste plastic metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100862013A CN100386453C (en) | 2006-08-18 | 2006-08-18 | Method for decoating on waste plastic metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1912154A true CN1912154A (en) | 2007-02-14 |
| CN100386453C CN100386453C (en) | 2008-05-07 |
Family
ID=37721208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100862013A Expired - Fee Related CN100386453C (en) | 2006-08-18 | 2006-08-18 | Method for decoating on waste plastic metal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100386453C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921918B (en) * | 2010-02-05 | 2012-01-04 | 吕忠庆 | Method for recovering metals and plastics from waste plastics containing metal plated layers |
| CN102399992A (en) * | 2011-12-16 | 2012-04-04 | 东北大学 | Method for recovering valuable metals from waste plastic plating layer containing copper and nickel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9127096D0 (en) * | 1991-12-20 | 1992-02-19 | Ici Plc | Treatment of liquid waste material |
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2006
- 2006-08-18 CN CNB2006100862013A patent/CN100386453C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921918B (en) * | 2010-02-05 | 2012-01-04 | 吕忠庆 | Method for recovering metals and plastics from waste plastics containing metal plated layers |
| CN102399992A (en) * | 2011-12-16 | 2012-04-04 | 东北大学 | Method for recovering valuable metals from waste plastic plating layer containing copper and nickel |
| CN102399992B (en) * | 2011-12-16 | 2013-07-10 | 东北大学 | Method for recovering valuable metals from waste plastic plating layer containing copper and nickel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100386453C (en) | 2008-05-07 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20080507 Termination date: 20110818 |