CN1155737C - Method of preparing zinc plating solvent by utilizing waste liquid - Google Patents
Method of preparing zinc plating solvent by utilizing waste liquid Download PDFInfo
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- CN1155737C CN1155737C CNB991174194A CN99117419A CN1155737C CN 1155737 C CN1155737 C CN 1155737C CN B991174194 A CNB991174194 A CN B991174194A CN 99117419 A CN99117419 A CN 99117419A CN 1155737 C CN1155737 C CN 1155737C
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- zinc
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- solution
- waste liquid
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Abstract
The present invention discloses a method for preparing zinc plating production solvents by utilizing waste liquid. The present invention is characterized in that after hydrochloric acid is used for deplating products, the concentration of Fe<2+> in a solution is measured, and excess hydrogen peroxide is used for oxidation to remove ferrum; hot zinc plating production solvents can be obtained by regulating the concentration. The present invention makes use of the principle of chemical reaction among substances to process waste acid discharging liquid after defective products from plated pieces are deplated, and the waste acid discharging liquid can become production solvents conforming to requirements for zinc plating production technologies after ferrum removal by oxidation and the concentration regulation of chloride zinc. Simultaneously, the present invention can reduce environmental pollution and can also make full use of zinc metal in deplating liquid.
Description
One. technical field
The invention belongs to the Industrial Wastewater Treatment field, particularly a kind of waste liquid that utilizes is produced zinc-plated a kind of method of producing solvent.
Two. background technology
In zinc-plated production process, because technologic a variety of causes, often there is the even unacceptable product that waits of product plating leakage or product uneven coating to produce, and when passing through plating bath, usually adhering to a large amount of zinc on the goods hanger, need carry out strip to it with acid and handle, then that the product behind the strip is zinc-plated again.The spent acid relief liquor normally directly to the nature discharging, causes environmental pollution, and makes a large amount of zinc metal loss.
Three. summary of the invention
Purpose of the present invention provides a kind of method of utilizing waste liquid to produce zinc plating solvent.After it handles dezincifying solution, do and produce zinc-plated production preparation, reduce environmental pollution, and can make full use of and move back zinc metal in the zinc liquid.
For reaching above-mentioned purpose, the invention provides a kind of method of utilizing waste liquid to produce zinc plating solvent, after it is characterized in that zinc coating being carried out strip, measure and contain Fe in the zinc waste liquid with hydrochloric acid
2+Concentration is heated to solution 80～90 ℃ then, slowly adds superoxol, adds hydrogen peroxide for measuring Fe in the solution
2+After the reaction equation of content and hydrogen peroxide calculates 50～100% question responses that need to add the hydrogen peroxide theoretical amount and stops, filtering, remove the throw out of iron, pure zinc is put in the clear liquid of decoating liquid, make zinc and hydrochloric acid reaction, Zn
2+Enter in the solution, after question response stopped, with EDTA complexometric titration chlorination zinc concentration, adjusting to zinc chloride was 600～800 grams per liters, promptly gets the production solvent of pot galvanize.
Measure Fe in the solution with dichromate titration
2+Concentration.
The present invention utilizes the chemical principle between material, the spent acid relief liquor behind the plating piece unacceptable product strip handled, and after adjusting through iron removal by oxidation and zinc oxide concentration, the production solvent that the spent acid relief liquor is become meet zinc-plated manufacturing technique requirent.Reduce environmental pollution simultaneously, can make full use of zinc metal in the decoating liquid.
The present invention is described further below by embodiment.But the present invention is not limited only to these examples.
Four. embodiment
Embodiment 1
The zinc coating that needs is moved back zinc immerses in the concentrated hydrochloric acid solution, treat that vigorous reaction stops after, will move back zinc spare immediately and take out, so repeatedly several times, treat that concentration of hydrochloric acid solution is reduced to 5 grams per liters, stops to move back zinc.Contain Fe in the zinc waste liquid with dichromate titration mensuration
2+Content.According to hydrogen peroxide and Fe
2+Reaction equation calculate the theoretical amount that need to add hydrogen peroxide, decoating liquid is heated to 80 ℃, slowly add excessive 50% hydrogen peroxide.After question response stopped, the throw out of iron was removed in filtration (or extracting surperficial clear liquid).Pure zinc is put in the clear liquid of decoating liquid, made zinc and hydrochloric acid reaction Zn
2+Enter in the solution, after question response stopped, with EDTA complexometric titration chlorination zinc concentration, adjusting to zinc chloride was 600 grams per liters, added needed other industrial chemicals in the production solvent of pot galvanize again, promptly obtained the production solvent of pot galvanize.
Embodiment 2
The zinc coating that needs is moved back zinc immerses in the concentrated hydrochloric acid solution, treat that vigorous reaction stops after, will move back zinc spare immediately and take out, so repeatedly several times, treat that concentration of hydrochloric acid solution is reduced to 10 grams per liters, stops to move back zinc.Contain Fe in the zinc waste liquid with dichromate titration mensuration
2+Content.According to hydrogen peroxide and Fe
2+Reaction equation calculate the theoretical amount that need to add hydrogen peroxide, decoating liquid is heated to 85 ℃, slowly add excessive 80% hydrogen peroxide, after question response stops, filtering (or extract surface clear liquid) throw out of iron removed.Pure zinc is put in the clear liquid of decoating liquid, made zinc and hydrochloric acid reaction Zn
2+Enter in the solution, after question response stopped, with EDTA complexometric titration chlorination zinc concentration, adjusting to zinc chloride was 700 grams per liters, added needed other industrial chemicals in the production solvent of pot galvanize again, promptly obtained the production solvent of pot galvanize.
Embodiment 3
The zinc coating that needs is moved back zinc immerses in the concentrated hydrochloric acid solution, treat that vigorous reaction stops after, will move back zinc spare immediately and take out, so repeatedly several times, treat that concentration of hydrochloric acid solution is reduced to 15 grams per liters, stops to move back zinc.Contain Fe in the zinc waste liquid with dichromate titration mensuration
2+Content.According to hydrogen peroxide and Fe
2+Reaction equation calculate the theoretical amount that need to add hydrogen peroxide, decoating liquid is heated to 90 ℃, slowly add excessive 100% hydrogen peroxide.After question response stopped, the throw out of iron was removed in filtration (or extracting surperficial clear liquid).Pure zinc is put in the clear liquid of decoating liquid, made zinc and hydrochloric acid reaction Zn
2+Enter in the solution, after question response stopped, with EDTA complexometric titration chlorination zinc concentration, adjusting to zinc chloride was 800 grams per liters, added needed other industrial chemicals in the production solvent of pot galvanize again, promptly obtained the production solvent of pot galvanize.
Claims (2)
1. method of utilizing waste liquid to produce zinc plating solvent after it is characterized in that with hydrochloric acid zinc coating being carried out strip, is measured and is contained Fe in the zinc waste liquid
2+Concentration is heated to solution 80～90 ℃ then, slowly adds superoxol, adds hydrogen peroxide for measuring Fe in the solution
2+The reaction equation of content and hydrogen peroxide calculates and need to add hydrogen peroxide theoretical amount and excessive 50～100%, after question response stops, filtering, and removes the throw out of iron, pure zinc is put in the clear liquid of decoating liquid, makes zinc and hydrochloric acid reaction, Zn
2+Enter in the solution, after question response stopped, with EDTA complexometric titration chlorination zinc concentration, adjusting to zinc chloride was 600～800 grams per liters, promptly gets the production solvent of pot galvanize.
2. the method for utilizing waste liquid to produce zinc plating solvent according to claim 1 is characterized in that measuring Fe in the solution with dichromate titration
2+Concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991174194A CN1155737C (en) | 1999-12-02 | 1999-12-02 | Method of preparing zinc plating solvent by utilizing waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991174194A CN1155737C (en) | 1999-12-02 | 1999-12-02 | Method of preparing zinc plating solvent by utilizing waste liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1298037A CN1298037A (en) | 2001-06-06 |
| CN1155737C true CN1155737C (en) | 2004-06-30 |
Family
ID=5280047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991174194A Expired - Fee Related CN1155737C (en) | 1999-12-02 | 1999-12-02 | Method of preparing zinc plating solvent by utilizing waste liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1155737C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955283B (en) * | 2010-08-27 | 2012-05-23 | 山东建筑大学 | Method for recycling waste liquid from alkaline zincate zinc plating process experiment tests in laboratory |
| CN101974682A (en) * | 2010-10-27 | 2011-02-16 | 攀枝花市硕盛工贸有限公司 | Method for extracting electrolytic zinc from oxide material containing less than 20% of zinc by using waste acid in titanium white plant |
| CN104878397B (en) * | 2015-06-17 | 2018-08-21 | 东北电力大学 | A kind for the treatment of fluid and processing method for waste galvanized plate surface zinc layers |
| CN105132932B (en) * | 2015-08-28 | 2018-02-06 | 新兴铸管股份有限公司 | A kind of galvanized part returns the recovery and treatment method for washing acid pickle |
| CN113089054B (en) * | 2021-03-22 | 2022-05-31 | 深圳市华星光电半导体显示技术有限公司 | Quantum dot composition and preparation method thereof |
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1999
- 1999-12-02 CN CNB991174194A patent/CN1155737C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1298037A (en) | 2001-06-06 |
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