CN102616971A - Comprehensive treatment method of laboratory acidic tin plating waste liquid - Google Patents
Comprehensive treatment method of laboratory acidic tin plating waste liquid Download PDFInfo
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- CN102616971A CN102616971A CN2011104155012A CN201110415501A CN102616971A CN 102616971 A CN102616971 A CN 102616971A CN 2011104155012 A CN2011104155012 A CN 2011104155012A CN 201110415501 A CN201110415501 A CN 201110415501A CN 102616971 A CN102616971 A CN 102616971A
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- waste liquid
- laboratory
- plated
- tin plating
- acid zinc
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Abstract
The invention relates to comprehensive utilization of waste liquids in the field of electroplating, specifically to a comprehensive treatment method of a laboratory acidic tin plating waste liquid. The method comprises the following steps of: first introducing O2 into a waste liquid, filtering the SnO2 generated from oxidization and in a reducing atmosphere reducing it to SnO, which is then collected for use, then adding activated carbon into the waste liquid to adsorb organic impurities and conducting filtration, then conducting distillation on the residual waste liquid to obtain distilled water, carrying out high temperature incineration to the remaining solid matter and then performing harmless deep burying treatment. The invention provides a simple, practical, and effective resource recovering and pollution reducing method for laboratory treatment of an acidic tin plating waste liquid.
Description
Technical field
The present invention relates to the method for the acid zinc-plated waste liquid comprehensive treating process in a kind of laboratory, mainly discuss the effect and the working method of this method.
Background technology
The temperature of acid tin plating technique requirement of experiment acid tin plating liquid remains on about 5 ℃, at this moment can obtain top-quality coating, in the acid tin plating technique experiment in laboratory; It is more that room temperature is higher than 5 ℃ weather; Particularly summer, room temperature in addition up to 30 ℃ about, yet generally be not equipped with the small test refrigerating apparatus when doing acid zinc-plated experiment in the laboratory; And acid zinc-plated be persistently overheating process, thereby temperature becomes the principal element that influences quality of coating.In the zinc-plated electroplating process of acidity, along with the rising of temperature, the hydrolysis ability of divalent tin ion strengthens thereupon in the plating bath, will produce more Sn (OH)
2And make plating bath become muddy, and make coating coarse, quality reduces.When the temperature of plating bath surpassed 30 ℃, brightening agent will produce organic impurity, along with increasing of these impurity, coating surface is grown dim, the coating obfuscation, and color and luster is uneven.In addition, divalent tin ion is easy to be oxidized to tetravalent tin and forms insoluble metastannic acid in air with on the anode in the plating bath, and makes plating bath become muddy, the effective Sn in the plating bath
2+Concentration descends rapidly, has a strong impact on coating performance.So after the acid tin plating technique experiment in laboratory, how handling zinc-plated waste liquid becomes the problem that people pay close attention to.The State Standard of the People's Republic of China stipulates that about " tin, antimony, mercury emission of industrial pollutants standard " it is 6mg/L that existing enterprise's water pollutes total tin quantity discharged, and it is 5mg/L that newly-built enterprise water pollutes total tin quantity discharged.The present invention has mainly introduced how to the laboratory the zinc-plated waste liquid of acidity to be carried out comprehensive treating process, makes it meet corresponding national standards.
Summary of the invention
The present invention is the method for the acid zinc-plated waste liquid comprehensive treating process in a kind of laboratory.
Because laboratory temperature can not finely be controlled at about 5 ℃, make in the acid tin plating liquid because Sn
2+Hydrolysis introduced Sn (OH)
2, its concrete equation is:
Because the decomposition of brightening agent produces organic impurity, moreover is exactly Sn
2+In air with on the anode, be easy to be oxidized to tetravalent tin and form insoluble metastannic acid, cause quality of coating to descend.
The staple of acid tin plating liquid: stannous sulfate, sulfuric acid, electroplating additive etc.
According to the composition and the concentration of plating bath, this patent provides a kind of simple and feasible method, removes the interference component in the plating bath, makes plating bath obtain comprehensive treating process, and the part material cycle is utilized.Its operation steps is following:
A. feeding concentration is 95% O in the acid zinc-plated waste liquid
2Continue circulation for some time, about 30～60min is used for the Sn of oxidation waste liquid
2+, it reacts as follows:
2Sn
2++O
2+2H
2O→2SnO
2↓+4H
+
B. the static after-filtration of step a being handled of waste liquid, the solid matter after collect filtering are placed on that 1h burns impurity in 600 ℃ the air, and the back is containing H
210%, contain N
2Collection tin protoxide powder utilizes again after placing 50h in 850 ℃ of reducing atmospheres of 90%;
C. add 3～5g gac in the waste liquid after step b being filtered and leave standstill one day after-filtration, filter out remaining organic impurity in the waste liquid;
D. remaining waste liquid among the step c is distilled processing, the solid after step c and the distillation is done the high temperature incineration harmless treatment;
Utilize the purity of the SnO of Potassium Iodate titration measuring collection, the purity of check is CP more than 99.50%, meets the plating requirement of experiment, can utilize once more.
Embodiment
Embodiment 1
Get the zinc-plated waste liquid of 1L, continue in waste liquid, to feed concentration and be 95% O
2About 30min filters.The above-mentioned throw out that filters out is placed in 600 ℃ the air and containing H behind the 1h
210%, contain N
2Place 50h in 850 ℃ of reducing atmospheres of 90% and obtain tin protoxide.The stannous oxide quality is 21.0g, and purity is 99.60% after testing.Residual waste solution is concentrated, added 3g activated carbon treatment after-filtration and go out throw out.Liquid is distilled processing, make zero(ppm) water 0.72L.
Embodiment 2
Get the zinc-plated waste liquid of 1.5L, continue in waste liquid, to feed concentration and be 95% O
2About 45min filters.The above-mentioned throw out that filters out is placed in 600 ℃ the air and containing H behind the 1h
210%, contain N
2Place 50h in 850 ℃ of reducing atmospheres of 90% and obtain tin protoxide.The stannous oxide quality is 33.0g, and purity is 99.85% after testing.Residual waste solution is concentrated, added 4.5g activated carbon treatment after-filtration and go out throw out.Liquid is distilled processing, make zero(ppm) water 1.06L.
Embodiment 3
Get the zinc-plated waste liquid of 2L, continue in waste liquid, to feed concentration and be 95% O
2About 1h filters.The above-mentioned throw out that filters out is placed in 600 ℃ the air and containing H behind the 1h
210%, contain N
2Place 50h in 850 ℃ of reducing atmospheres of 90% and obtain tin protoxide.The stannous oxide quality is 46.0g, and purity is 99.70% after testing.Residual waste solution is concentrated, added 6g activated carbon treatment after-filtration and go out throw out.Liquid is distilled processing, make zero(ppm) water 1.43L.
Claims (3)
1. the method for the acid zinc-plated waste liquid comprehensive treating process in a laboratory mainly may further comprise the steps:
(1) continue feeding concentration in the acid zinc-plated waste liquid is 95% O
2About 30～60min is used for the Sn of oxidation waste liquid
2+, it reacts as follows:
2Sn
2++O
2+2H
2O→2SnO
2↓+4H
+
(2) the static after-filtration of step (1) being handled of waste liquid, the solid matter after collect filtering are placed on that 1h burns impurity in 600 ℃ the air, and the back is containing H
210%, contain N
2Place 50h in 850 ℃ of reducing atmospheres of 90%, with the tin protoxide powder collection utilization that obtains;
(3) after adding 3～5g gac in the waste liquid after step (2) filtration, refilter, remove remaining organic impurity in the waste liquid;
(4) remaining waste liquid in the step (3) is distilled processing;
(5) with innoxious buried processing behind the solid high temperature incineration after step (4) and the distillation;
2. the method for the acid zinc-plated waste liquid comprehensive treating process in a kind of laboratory according to claim 1, wherein step (2) reclaims tin protoxide;
3. the method for the acid zinc-plated waste liquid comprehensive treating process in a kind of laboratory according to claim 1, wherein step (4) is produced zero(ppm) water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104155012A CN102616971A (en) | 2011-12-14 | 2011-12-14 | Comprehensive treatment method of laboratory acidic tin plating waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104155012A CN102616971A (en) | 2011-12-14 | 2011-12-14 | Comprehensive treatment method of laboratory acidic tin plating waste liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102616971A true CN102616971A (en) | 2012-08-01 |
Family
ID=46557253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104155012A Pending CN102616971A (en) | 2011-12-14 | 2011-12-14 | Comprehensive treatment method of laboratory acidic tin plating waste liquid |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103833069A (en) * | 2013-12-20 | 2014-06-04 | 柳州百韧特先进材料有限公司 | Method for preparing stannous oxide by using stannous methanesulfonate stanniferous waste solution |
| CN105177694A (en) * | 2015-09-11 | 2015-12-23 | 佛山科学技术学院 | Electrogilding solution organic impurity removing method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57180483A (en) * | 1981-04-30 | 1982-11-06 | Hitachi Ltd | Treatment of waste liquid containing tervalent tin |
| CN86101062A (en) * | 1985-01-18 | 1986-07-23 | 曼彻姆有限公司 | Extraction of tin from tin ore |
| DE19539833A1 (en) * | 1995-10-26 | 1997-04-30 | Over Eloxal Gmbh | Removing tin compounds from aqueous solutions |
| TWI281955B (en) * | 2003-03-03 | 2007-06-01 | Amia Co Ltd | Treatment method of waste tin lead stripping solution |
| CN101942675A (en) * | 2010-09-10 | 2011-01-12 | 常州大学 | Method for recycling Sn<2+> in waste water by electrolytic reduction |
| CN101955283A (en) * | 2010-08-27 | 2011-01-26 | 山东建筑大学 | Method for recycling waste liquid from alkaline zincate zinc plating process experiment tests in laboratory |
-
2011
- 2011-12-14 CN CN2011104155012A patent/CN102616971A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57180483A (en) * | 1981-04-30 | 1982-11-06 | Hitachi Ltd | Treatment of waste liquid containing tervalent tin |
| CN86101062A (en) * | 1985-01-18 | 1986-07-23 | 曼彻姆有限公司 | Extraction of tin from tin ore |
| DE19539833A1 (en) * | 1995-10-26 | 1997-04-30 | Over Eloxal Gmbh | Removing tin compounds from aqueous solutions |
| TWI281955B (en) * | 2003-03-03 | 2007-06-01 | Amia Co Ltd | Treatment method of waste tin lead stripping solution |
| CN101955283A (en) * | 2010-08-27 | 2011-01-26 | 山东建筑大学 | Method for recycling waste liquid from alkaline zincate zinc plating process experiment tests in laboratory |
| CN101942675A (en) * | 2010-09-10 | 2011-01-12 | 常州大学 | Method for recycling Sn<2+> in waste water by electrolytic reduction |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103833069A (en) * | 2013-12-20 | 2014-06-04 | 柳州百韧特先进材料有限公司 | Method for preparing stannous oxide by using stannous methanesulfonate stanniferous waste solution |
| CN103833069B (en) * | 2013-12-20 | 2016-04-20 | 柳州百韧特先进材料有限公司 | A kind of method utilizing the stanniferous waste liquid of stannous methanesulfonate to prepare tin protoxide |
| CN105177694A (en) * | 2015-09-11 | 2015-12-23 | 佛山科学技术学院 | Electrogilding solution organic impurity removing method |
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Application publication date: 20120801 |