CN1037674C - Method for recovering and treating waste liquid containing acid and copper - Google Patents
Method for recovering and treating waste liquid containing acid and copper Download PDFInfo
- Publication number
- CN1037674C CN1037674C CN 95105908 CN95105908A CN1037674C CN 1037674 C CN1037674 C CN 1037674C CN 95105908 CN95105908 CN 95105908 CN 95105908 A CN95105908 A CN 95105908A CN 1037674 C CN1037674 C CN 1037674C
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- waste liquid
- copper
- organic solvent
- acid
- recovering
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a method for recovering and reusing copper and acid from regenerated fiber products by using a copper ammonium method. The method is characterized in that an organic solvent which is mixed with water is added into waste liquid containing the acid and the copper, and the volumetric ratio of the organic solvent to the waste liquid is 0.5: 1 to 10: 1; subsequently, a solution is crystallized at a temperature which is smaller than 50 DEG C to separate out copper salt, and crystals are separated; finally, the organic solvent in mother liquor is separated. The method can be used to obtain the high-grade copper salt; the organic solvent can be repeatedly used, and treated acid liquid can be reused in the original production process. Besides, the method has the advantages of no discharge of waste water and high productive efficiency, and overcomes fundamentally the insufficiency of the prior art.
Description
The present invention relates to a kind of method of from acid contained waste liquid, extracting mantoquita, relate in particular to a kind of method of from cuprammonium process regenerated fibre products production, extracting mantoquita and utilizing acid again.
Adopt at present extensively neutralisation to handle acid contained waste liquid, its main technique flow process is as follows: acid contained waste liquid and alkaline solution are neutralized in neutralizing well, generate copper hydroxide (cupric oxide) and precipitate, leach throw out after the reaction and directly discharge filtrate; Throw out that leaches and sulfuric acid reaction generate copper sulfate and crystallization is separated out, and crystalline mother solution is directly discharging then.This method has the following disadvantages:
1, this method with in acid contained waste liquid and the alkaline solution and the time, the solid precipitation particle of generation is superfine, sees through filtration medium easily and falls with filtrate discharge, causes the copper sulfate finished product yield to reduce and pollutes bad border.
2, this method with in acid contained waste liquid and the alkaline solution and the time, though can regulate the mixed speed of two kinds of solution and the conditions such as pH value of neutralization back solution, the copper ion concentration in the solution of neutralization back is remained at low levels, control accuracy is not high, effect is unsatisfactory.
3, this method is extracted in the process of mantoquita, and not only a large amount of acid can not be recycled, and will consume a large amount of alkali, has increased cost recovery greatly.In addition, a large amount of inorganic salt that generate during acid-base neutralisation also are adsorbed on the copper hydroxide precipitation that neutralization generates easily, and enter in the crystallizer tank thereupon, and the content of impurity in the solution when increasing crystallization influences the quality of finished product copper sulfate.
4, this method is extracted mantoquita from acid contained waste liquid, needs through twice neutralization and one time of crystallization, and the treatment time was 24 hours, and production efficiency is low, and unit output is few.
When 5, this method is extracted mantoquita from acid contained waste liquid, after crystallization is finished, Cu in the crystalline mother solution
2+Content is greater than 0.1g/L, and directly discharging will cause serious bad environment pollution.Though can adopt method such as ion-exchange to handle to conforming with environmental requirement, part copper directly obtains required cupric sulphate crystal thus, removal process production efficiency is reduced, cost increases.
In sum, the method for commonly using for a long time of extracting mantoquita from acid contained waste liquid has long, shortcomings such as efficient is low, cost height of production cycle.This is determined by its production principle.
The purpose of this invention is to provide a kind of method of from acid contained waste liquid, extracting mantoquita, adopt present method can reclaim the mantoquita crystallization that obtains higher quality, the acid in simultaneously can the recovery and reuse waste liquid, not to extraneous waste discharge, and the production efficiency height.
The solution of the present invention is: the organic solvent that adding can be miscible with water in the oxytropism contained waste liquid, and this solvent and waste liquid volume ratio are 0.5: 1-10: 1, make solution crystallization separate out mantoquita below 50 ℃ then, separate this crystallization, separate the organic solvent in the mother liquor again.Organic solvent wherein can be methyl alcohol, ethanol, acetone, ethyl acetate.
Adopt the present invention can obtain the mantoquita of higher quality, used organic solvent is reusable, and the acid solution of handling can be reused in the original production process, not outside waste discharge, and the production efficiency height has fundamentally overcome the deficiencies in the prior art.
Embodiment
In encloses container, with following volume ratio the acid contained waste liquid that acetone or alcohol and copper sulfate content are more than the 20g/L, sulfuric acid content is 5% (weight percent) is mixed, fully after the vibration, make cupric sulphate crystal at a certain temperature; Leave standstill five minutes after-filtration, fractionation by distillation goes out acetone or alcohol from filtrate; Sulfur acid copper can be directly as the cellulose regenerated liquid in the cuprammonium process regenerated cellulose products production in the crystalline mother solution after the distillation; Measure residual copper (in the cupric sulfate crystals) concentration in the crystalline mother solution after distilling, the result is as follows:
| Organic solvent | Organic solvent: waste liquid volume ratio (V/V) | Tc ℃ | Residual copper concentration g/L |
| Acetone | 0.8∶1 | 5 | 8.50 |
| 3∶1 | 25 | 1.80 | |
| 8∶1 | 50 | 1.96 | |
| Ethanol | 1.5∶1 | 5 | 4.98 |
| 3∶1 | 25 | 5.31 | |
| 8∶1 | 50 | 3.43 |
Claims (1)
1, a kind of method of from acid contained waste liquid, extracting mantoquita, it is characterized in that the organic solvent that adding can be miscible with water in the oxytropism contained waste liquid, this solvent and waste liquid volume ratio are 0.5: 1-10: 1, make solution crystallization separate out mantoquita below 50 ℃ then, separate this crystallization, separate the organic solvent in the mother liquor again, organic solvent wherein is methyl alcohol, ethanol, acetone, ethyl acetate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95105908 CN1037674C (en) | 1995-05-30 | 1995-05-30 | Method for recovering and treating waste liquid containing acid and copper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95105908 CN1037674C (en) | 1995-05-30 | 1995-05-30 | Method for recovering and treating waste liquid containing acid and copper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1117946A CN1117946A (en) | 1996-03-06 |
| CN1037674C true CN1037674C (en) | 1998-03-11 |
Family
ID=5075643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95105908 Expired - Fee Related CN1037674C (en) | 1995-05-30 | 1995-05-30 | Method for recovering and treating waste liquid containing acid and copper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1037674C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584129B (en) * | 2003-08-20 | 2010-11-24 | 李德良 | Method for separating copper from copper-containing waste liquid |
-
1995
- 1995-05-30 CN CN 95105908 patent/CN1037674C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584129B (en) * | 2003-08-20 | 2010-11-24 | 李德良 | Method for separating copper from copper-containing waste liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1117946A (en) | 1996-03-06 |
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| CF01 | Termination of patent right due to non-payment of annual fee |