CN111348793A - Treatment method of hydrazine hydrate liquid-phase reduction silver powder waste liquid - Google Patents
Treatment method of hydrazine hydrate liquid-phase reduction silver powder waste liquid Download PDFInfo
- Publication number
- CN111348793A CN111348793A CN201811583645.7A CN201811583645A CN111348793A CN 111348793 A CN111348793 A CN 111348793A CN 201811583645 A CN201811583645 A CN 201811583645A CN 111348793 A CN111348793 A CN 111348793A
- Authority
- CN
- China
- Prior art keywords
- mixed solution
- liquid
- intermediate mixed
- hydrazine hydrate
- silver powder
- 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.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
Abstract
The invention discloses a treatment method of hydrazine hydrate liquid-phase reduction silver powder waste liquid, which is realized by the following steps: 1) adding activated carbon into hydrazine hydrate liquid-phase reduced silver powder waste liquid, uniformly stirring, standing, filtering, and collecting first filtrate and first filter residue; 2) adding a nickel catalyst into the first filtrate, and stirring for reaction to obtain a first intermediate mixed solution; 3) removing NH in the first intermediate mixed liquid by adopting a stripping method4 +Obtaining a second intermediate mixed solution; 4) adding acid into the second intermediate mixed solution, adjusting the pH value to 5-6, adding tannin, and uniformly stirringMixing and standing to obtain a third intermediate mixed solution; 5) and adding alkali into the third intermediate mixed solution, and adjusting the pH value to 6.5-7.5 to obtain reuse water. The method realizes good treatment effect on the hydrazine hydrate liquid-phase reduction silver powder waste liquid, and can achieve secondary discharge, thereby effectively reducing the discharge of waste water and playing a role in energy conservation and emission reduction.
Description
Technical Field
The invention belongs to the technical field of waste liquid treatment, and particularly relates to a treatment method of hydrazine hydrate liquid-phase reduction silver powder waste liquid.
Background
The hydrazine hydrate liquid phase reduction silver powder generally adopts silver-ammonia solution as a raw material, and because nano silver has strong surface activity and is easy to agglomerate in the reaction process, some surface modifiers can be added in the synthesis process, and meanwhile, in order to improve the reduction efficiency, the hydrazine hydrate excess coefficient is generally between 1.5 and 2.0. The solution after silver powder reduction contains a large amount of ammonia, hydrazine hydrate, a surface modifier and a trace amount of silver ions, so how to reasonably and efficiently treat the hydrazine hydrate liquid phase reduction silver powder waste liquid becomes the industrial popularization which restricts the hydrazine hydrate liquid phase reduction metal powder.
Disclosure of Invention
In view of the above, the main purpose of the present invention is to provide a method for treating hydrazine hydrate liquid-phase reduced silver powder waste liquid, which solves the problems in the prior art that the hydrazine hydrate liquid-phase reduced silver powder waste liquid is not thoroughly treated and cannot be discharged again.
In order to achieve the purpose, the technical scheme of the invention is realized as follows: a treatment method of hydrazine hydrate liquid phase reduction silver powder waste liquid is realized by the following steps:
step 1, adding activated carbon into hydrazine hydrate liquid-phase reduced silver powder waste liquid, uniformly stirring, standing, filtering, and collecting first filtrate and first filter residue;
step 2, adding a nickel catalyst into the first filtrate, and stirring for reaction to obtain a first intermediate mixed solution;
step 3, removing NH in the first intermediate mixed liquid by adopting a stripping method4 +Obtaining a second intermediate mixed solution;
step 4, adding acid into the second intermediate mixed solution, adjusting the pH value to 5-6, adding tannin, stirring uniformly, and standing to obtain a third intermediate mixed solution;
and 5, adding alkali into the third intermediate mixed solution, and adjusting the pH value to 6.5-7.5 to obtain reuse water.
Preferably, in the step 1, the standing time is 20-40 min, and the standing temperature is 30-40 ℃.
Preferably, in the step 2, the stirring reaction time is 30-50 min, and the stirring reaction temperature is 30-60 ℃.
Preferably, the specific method of step 3 is: and heating the first intermediate mixed solution to 100 ℃, then spraying the heated first intermediate mixed solution from the top of the stripping tower, enabling the heated first intermediate mixed solution to meet with the ascending vapor flow in the stripping tower, carrying out mass transfer in a packing layer or on a tower plate in the stripping tower, and collecting a second intermediate mixture in a water collecting tank in the stripping tower and ammonia water discharged from the top of the stripping tower.
Preferably, in the step 4, the acid is one or more of hydrochloric acid, sulfuric acid and nitric acid.
Preferably, in the step 4, the standing time is 20-40 min, and the standing temperature is 30-40 ℃.
Preferably, in the step 4, the content of silver in the third intermediate mixed solution is less than 0.1 mg/l.
Preferably, in the step 5, the alkali is at least one of sodium hydroxide, sodium carbonate and sodium bicarbonate.
Compared with the prior art, the method for treating the hydrazine hydrate liquid-phase reduced silver powder waste liquid sequentially through activated carbon adsorption, nickel catalyst catalysis, ammonia stripping removal and tannin adsorption realizes good treatment effect on the hydrazine hydrate liquid-phase reduced silver powder waste liquid, can achieve secondary discharge, thereby effectively reducing the discharge of waste water, and simultaneously has the effects of energy conservation and emission reduction.
Drawings
Fig. 1 is a process flow chart of a treatment method of hydrazine hydrate liquid-phase reduction silver powder waste liquid provided by the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a method for treating hydrazine hydrate liquid-phase silver powder reduction waste liquid, which is realized by the following steps:
step 1, adding activated carbon into hydrazine hydrate liquid-phase reduced silver powder waste liquid, uniformly stirring, standing for 20-40 min at 30-40 ℃, filtering again, and collecting first filtrate and first filter residue; the main purpose of the step is to remove the modifier in the hydrazine hydrate liquid phase reduction silver powder waste liquid;
step 2, adding a nickel catalyst into the first filtrate, and stirring and reacting at 30-60 ℃ for 30-50 min to obtain a first intermediate mixed solution; the main purpose of this step is to decompose the hydrazine hydrate in the first filtrate into NH4 +(NH3)；
Wherein, the nickel catalyst is mainly used for catalyzing the decomposition of hydrazine hydrate, the nickel catalyst is preferably designed in the middle of a lifting device, the solution is firstly heated to 85-105 ℃, then flows through a hydrazine hydrate decomposer with the nickel catalyst, the hydrazine hydrate is decomposed into ammonia gas, and the ammonia gas is absorbed by water to obtain ammonia water.
Step 3, removing NH4+ (NH) in the first intermediate mixed liquid by adopting a stripping method3) Obtaining a second intermediate mixed solution; the main purpose of this step is to remove NH4+ (NH) from the first intermediate mixture3)；
The specific method comprises the following steps: heating the first intermediate mixed solution to 100 ℃, then spraying the heated first intermediate mixed solution from the top of the stripping tower to meet with the ascending vapor flow in the stripping tower, carrying out mass transfer in a packing layer or on a tower plate in the stripping tower, and collecting a second intermediate mixture in a water collecting tank in the stripping tower and ammonia water discharged from the top of the stripping tower;
step 4, adding acid into the second intermediate mixed solution, adjusting the pH value to 5-6, adding tannin, stirring uniformly, and standing for 20-40 min at 30-40 ℃ to obtain a third intermediate mixed solution with the silver content of less than 0.1 mg/l; wherein, the acid is one or more of hydrochloric acid, sulfuric acid and nitric acid; the main purpose of this step is to remove the heavy metal silver in the second intermediate mixed solution by adsorption
Step 5, adding alkali into the third intermediate mixed solution, and adjusting the pH value to 6.5-7.5 to obtain reuse water; wherein the alkali is at least one of sodium hydroxide, sodium carbonate and sodium bicarbonate; the purpose of this step is to adjust the pH value of the third intermediate mixed solution so that the third intermediate mixed solution can be recycled.
Example 1
Step 1, adding activated carbon into hydrazine hydrate liquid-phase reduced silver powder waste liquid, uniformly stirring, standing for 30min at 30 ℃, filtering again, and collecting first filtrate and first filter residue;
step 2, adding a nickel catalyst into the first filtrate obtained in the step 1, and stirring and reacting for 40min at 40 ℃ to obtain a first intermediate mixed solution;
step 3, removing NH4+ in the first intermediate mixed solution by adopting a stripping method to obtain a second intermediate mixed solution;
step 4, adding hydrochloric acid into the second intermediate mixed solution, adjusting the pH value to 5-6, adding tannin, uniformly stirring, and standing for 30min at 30 ℃ to obtain a third intermediate mixed solution with the silver content of less than 0.1 mg/l;
and 5, adding sodium hydroxide into the third intermediate mixed solution, and adjusting the pH value to 6.5-7.5 to obtain reuse water.
The reuse water obtained in example 1 was tested, and the test results were: the pH value of the reuse water is 6-8, the COD is 30-50ppm, the content of ammonia nitrogen is 50-100ppm, and the content of Ag is 0.1 mg/l.
Example 2
Step 1, adding activated carbon into hydrazine hydrate liquid-phase reduced silver powder waste liquid, uniformly stirring, standing for 20min at 40 ℃, filtering again, and collecting first filtrate and first filter residue;
step 2, adding a nickel catalyst into the first filtrate obtained in the step 1, and stirring and reacting for 30min at the temperature of 30 ℃ to obtain a first intermediate mixed solution;
step 3, removing NH4+ in the first intermediate mixed solution by adopting a stripping method to obtain a second intermediate mixed solution;
step 4, adding hydrochloric acid into the second intermediate mixed solution, adjusting the pH value to 5-6, adding tannin, uniformly stirring, and standing for 20min at 40 ℃ to obtain a third intermediate mixed solution with the silver content of less than 0.1 mg/l;
and 5, adding sodium hydroxide into the third intermediate mixed solution, and adjusting the pH value to 6.5-7.5 to obtain reuse water.
The reuse water obtained in example 2 was tested, and the test results were: the pH value of the reuse water is 6-8, the COD is 30-50ppm, the content of ammonia nitrogen is 50-100ppm, and the content of Ag is 0.1 mg/l.
Example 3
Step 1, adding activated carbon into hydrazine hydrate liquid-phase reduced silver powder waste liquid, uniformly stirring, standing for 40min at 30 ℃, filtering again, and collecting first filtrate and first filter residue;
step 2, adding a nickel catalyst into the first filtrate obtained in the step 1, and stirring and reacting for 30min at 60 ℃ to obtain a first intermediate mixed solution;
step 3, removing NH4+ in the first intermediate mixed solution by adopting a stripping method to obtain a second intermediate mixed solution;
step 4, adding hydrochloric acid into the second intermediate mixed solution, adjusting the pH value to 5-6, adding tannin, uniformly stirring, and standing for 40min at 30 ℃ to obtain a third intermediate mixed solution with the silver content of less than 0.1 mg/l;
and 5, adding sodium hydroxide into the third intermediate mixed solution, and adjusting the pH value to 6.5-7.5 to obtain reuse water.
The reuse water obtained in example 3 was tested, and the test results were: the pH value of the reuse water is 6-8, the COD is 30-50ppm, the content of ammonia nitrogen is 50-100ppm, and the content of Ag is 0.1 mg/l.
Example 4
Step 1, adding activated carbon into hydrazine hydrate liquid-phase reduced silver powder waste liquid, uniformly stirring, standing for 30min at 30 ℃, filtering again, and collecting first filtrate and first filter residue;
step 2, adding a nickel catalyst into the first filtrate obtained in the step 1, and stirring and reacting for 40min at 40 ℃ to obtain a first intermediate mixed solution;
step 3, removing NH4+ in the first intermediate mixed solution by adopting a stripping method to obtain a second intermediate mixed solution;
step 4, adding sulfuric acid into the second intermediate mixed solution, adjusting the pH value to 5-6, adding tannin, uniformly stirring, and standing for 20min at 40 ℃ to obtain a third intermediate mixed solution with the silver content of less than 0.1 mg/l;
and 5, adding sodium carbonate into the third intermediate mixed solution, and adjusting the pH value to 6.5-7.5 to obtain reuse water.
The reuse water obtained in example 4 was tested, and the test results were: the pH value of the reuse water is 6-8, the COD is 30-50ppm, the content of ammonia nitrogen is 50-100ppm, and the content of Ag is 0.1 mg/l.
Example 5
Step 1, adding activated carbon into hydrazine hydrate liquid-phase reduced silver powder waste liquid, uniformly stirring, standing for 30min at 30 ℃, filtering again, and collecting first filtrate and first filter residue;
step 2, adding a nickel catalyst into the first filtrate obtained in the step 1, and stirring and reacting for 40min at 40 ℃ to obtain a first intermediate mixed solution;
step 3, removing NH4+ in the first intermediate mixed solution by adopting a stripping method to obtain a second intermediate mixed solution;
step 4, adding sulfuric acid into the second intermediate mixed solution, adjusting the pH value to 5-6, adding tannin, uniformly stirring, and standing for 40min at 30 ℃ to obtain a third intermediate mixed solution with the silver content of less than 0.1 mg/l;
and 5, adding sodium hydroxide into the third intermediate mixed solution, and adjusting the pH value to 6.5-7.5 to obtain reuse water.
The reuse water obtained in example 5 was tested, and the test results were: the pH value of the reuse water is 6-8, the COD is 30-50ppm, the content of ammonia nitrogen is 50-100ppm, and the content of Ag is 0.1 mg/l.
Example 6
Step 1, adding activated carbon into hydrazine hydrate liquid-phase reduced silver powder waste liquid, uniformly stirring, standing for 20min at 40 ℃, filtering again, and collecting first filtrate and first filter residue;
step 2, adding a nickel catalyst into the first filtrate obtained in the step 1, and stirring and reacting for 30min at the temperature of 30 ℃ to obtain a first intermediate mixed solution;
step 3, removing NH4+ in the first intermediate mixed solution by adopting a stripping method to obtain a second intermediate mixed solution;
step 4, adding hydrochloric acid into the second intermediate mixed solution, adjusting the pH value to 5-6, adding tannin, uniformly stirring, and standing for 30min at 30 ℃ to obtain a third intermediate mixed solution with the silver content of less than 0.1 mg/l;
and 5, adding sodium carbonate into the third intermediate mixed solution, and adjusting the pH value to 6.5-7.5 to obtain reuse water.
The reuse water obtained in example 6 was tested, and the test results were: the pH value of the reuse water is 6-8, the COD is 30-50ppm, the content of ammonia nitrogen is 50-100ppm, and the content of Ag is 0.1 mg/l.
Example 7
Step 1, adding activated carbon into hydrazine hydrate liquid-phase reduced silver powder waste liquid, uniformly stirring, standing for 20min at 40 ℃, filtering again, and collecting first filtrate and first filter residue;
step 2, adding a nickel catalyst into the first filtrate obtained in the step 1, and stirring and reacting for 30min at the temperature of 30 ℃ to obtain a first intermediate mixed solution;
step 3, removing NH4+ in the first intermediate mixed solution by adopting a stripping method to obtain a second intermediate mixed solution;
step 4, adding hydrochloric acid into the second intermediate mixed solution, adjusting the pH value to 5-6, adding tannin, uniformly stirring, and standing for 40min at 30 ℃ to obtain a third intermediate mixed solution with the silver content of less than 0.1 mg/l;
and 5, adding sodium bicarbonate into the third intermediate mixed solution, and adjusting the pH value to 6.5-7.5 to obtain reuse water.
The reuse water obtained in example 7 was tested, and the test results were: the pH value of the reuse water is 6-8, the COD is 30-50ppm, the content of ammonia nitrogen is 50-100ppm, and the content of Ag is 0.1 mg/l.
Example 8
Step 1, adding activated carbon into hydrazine hydrate liquid-phase reduced silver powder waste liquid, uniformly stirring, standing for 40min at 30 ℃, filtering again, and collecting first filtrate and first filter residue;
step 2, adding a nickel catalyst into the first filtrate obtained in the step 1, and stirring and reacting for 30min at 60 ℃ to obtain a first intermediate mixed solution;
step 3, removing NH4+ in the first intermediate mixed solution by adopting a stripping method to obtain a second intermediate mixed solution;
step 4, adding sulfuric acid into the second intermediate mixed solution, adjusting the pH value to 5-6, adding tannin, uniformly stirring, and standing for 30min at 30 ℃ to obtain a third intermediate mixed solution with the silver content of less than 0.1 mg/l;
and 5, adding sodium hydroxide into the third intermediate mixed solution, and adjusting the pH value to 6.5-7.5 to obtain reuse water.
The reuse water obtained in example 8 was tested, and the test results were: the pH value of the reuse water is 6-8, the COD is 30-50ppm, the content of ammonia nitrogen is 50-100ppm, and the content of Ag is 0.1 mg/l.
Example 9
Step 1, adding activated carbon into hydrazine hydrate liquid-phase reduced silver powder waste liquid, uniformly stirring, standing for 40min at 30 ℃, filtering again, and collecting first filtrate and first filter residue;
step 2, adding a nickel catalyst into the first filtrate obtained in the step 1, and stirring and reacting for 30min at 60 ℃ to obtain a first intermediate mixed solution;
step 3, removing NH4+ in the first intermediate mixed solution by adopting a stripping method to obtain a second intermediate mixed solution;
step 4, adding hydrochloric acid into the second intermediate mixed solution, adjusting the pH value to 5-6, adding tannin, uniformly stirring, and standing for 20min at 40 ℃ to obtain a third intermediate mixed solution with the silver content of less than 0.1 mg/l;
and 5, adding sodium hydroxide into the third intermediate mixed solution, and adjusting the pH value to 6.5-7.5 to obtain reuse water.
The reuse water obtained in example 9 was tested, and the test results were: the pH value of the reuse water is 6-8, the COD is 30-50ppm, the content of ammonia nitrogen is 50-100ppm, and the content of Ag is 0.1 mg/l.
According to the detection data of the pH, COD, ammonia nitrogen content and Ag content of the reuse water obtained in the examples 1-9, the treatment effect of the hydrazine hydrate liquid-phase reduced silver powder waste liquid is better after the method is adopted to treat the hydrazine hydrate liquid-phase reduced silver powder waste liquid.
The method for treating the hydrazine hydrate liquid-phase reduced silver powder waste liquid sequentially through activated carbon adsorption, nickel catalyst catalysis, stripping ammonia removal and tannin adsorption realizes good treatment effect on the hydrazine hydrate liquid-phase reduced silver powder waste liquid, can achieve secondary discharge, effectively reduces the discharge of waste water, and plays a role in energy conservation and emission reduction.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (7)
1. The method for treating the liquid-phase hydrazine hydrate silver powder reduction waste liquid is characterized by comprising the following steps of:
step 1, adding activated carbon into hydrazine hydrate liquid-phase reduced silver powder waste liquid, uniformly stirring, standing, filtering, and collecting first filtrate and first filter residue;
step 2, adding a nickel catalyst into the first filtrate, and stirring for reaction to obtain a first intermediate mixed solution;
step 3, removing NH in the first intermediate mixed liquid by adopting a stripping method4 +Obtaining a second intermediate mixed solution;
step 4, adding acid into the second intermediate mixed solution, adjusting the pH value to 5-6, adding tannin, stirring uniformly, and standing to obtain a third intermediate mixed solution;
and 5, adding alkali into the third intermediate mixed solution, and adjusting the pH value to 6.5-7.5 to obtain reuse water.
2. The method for treating the hydrazine hydrate liquid-phase reduced silver powder waste liquid according to claim 1, wherein in the step 1, the standing time is 20-40 min, and the standing temperature is 30-40 ℃.
3. The method for treating the hydrazine hydrate liquid-phase reduced silver powder waste liquid according to claim 2, wherein in the step 2, the stirring reaction time is 30-50 min, and the stirring reaction temperature is 30-60 ℃.
4. The method for treating liquid phase hydrazine hydrate reduction silver powder waste liquid according to claim 3, wherein in the step 4, the acid is one or more of hydrochloric acid, sulfuric acid and nitric acid.
5. The method for treating the hydrazine hydrate liquid-phase reduced silver powder waste liquid according to claim 4, wherein in the step 4, the standing time is 20-40 min, and the standing temperature is 30-40 ℃.
6. The method for treating waste liquid of liquid-phase hydrazine hydrate-reduced silver powder according to claim 5, wherein in the step 4, the content of silver in the third intermediate mixed solution is less than 0.1 mg/l.
7. The method for treating liquid-phase hydrazine hydrate-reduced silver powder waste liquid according to any one of claims 1 to 6, wherein in the step 5, the alkali is at least one of sodium hydroxide, sodium carbonate and sodium bicarbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811583645.7A CN111348793B (en) | 2018-12-24 | 2018-12-24 | Treatment method of hydrazine hydrate liquid-phase reduction silver powder waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811583645.7A CN111348793B (en) | 2018-12-24 | 2018-12-24 | Treatment method of hydrazine hydrate liquid-phase reduction silver powder waste liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111348793A true CN111348793A (en) | 2020-06-30 |
| CN111348793B CN111348793B (en) | 2022-01-07 |
Family
ID=71191990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811583645.7A Active CN111348793B (en) | 2018-12-24 | 2018-12-24 | Treatment method of hydrazine hydrate liquid-phase reduction silver powder waste liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111348793B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111889692A (en) * | 2020-07-09 | 2020-11-06 | 荆楚理工学院 | Monodisperse superfine copper powder and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1569369A (en) * | 2004-05-12 | 2005-01-26 | 北京科技大学 | Industrialized preparation technology of nm-class silver powder |
| WO2010010569A1 (en) * | 2008-07-24 | 2010-01-28 | Tata Chemicals Ltd | A process for forming a rice husk ash composition |
| CN102335751A (en) * | 2011-09-22 | 2012-02-01 | 上海交通大学 | Method for preparing highly dispersed ultrafine spherical silver powder |
| CN107058757A (en) * | 2017-03-24 | 2017-08-18 | 金川集团股份有限公司 | A kind of production method of the separation of Silver from silver-containing liquid waste |
| CN107721023A (en) * | 2017-11-22 | 2018-02-23 | 天津海泽惠科技发展有限公司 | A kind of hydrazine hydrate wastewater treatment equipment and its technique |
| CN107970897A (en) * | 2016-10-21 | 2018-05-01 | 齐鲁工业大学 | A kind of preparation method for removing the tannin base adsorbent of heavy metal ion in water removal |
-
2018
- 2018-12-24 CN CN201811583645.7A patent/CN111348793B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1569369A (en) * | 2004-05-12 | 2005-01-26 | 北京科技大学 | Industrialized preparation technology of nm-class silver powder |
| WO2010010569A1 (en) * | 2008-07-24 | 2010-01-28 | Tata Chemicals Ltd | A process for forming a rice husk ash composition |
| CN102335751A (en) * | 2011-09-22 | 2012-02-01 | 上海交通大学 | Method for preparing highly dispersed ultrafine spherical silver powder |
| CN107970897A (en) * | 2016-10-21 | 2018-05-01 | 齐鲁工业大学 | A kind of preparation method for removing the tannin base adsorbent of heavy metal ion in water removal |
| CN107058757A (en) * | 2017-03-24 | 2017-08-18 | 金川集团股份有限公司 | A kind of production method of the separation of Silver from silver-containing liquid waste |
| CN107721023A (en) * | 2017-11-22 | 2018-02-23 | 天津海泽惠科技发展有限公司 | A kind of hydrazine hydrate wastewater treatment equipment and its technique |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111889692A (en) * | 2020-07-09 | 2020-11-06 | 荆楚理工学院 | Monodisperse superfine copper powder and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111348793B (en) | 2022-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3885039A1 (en) | Graphite-like carbon nitride doped modified microsphere catalyst, and preparation method therefor and application thereof | |
| CN109292883B (en) | Graphitized biochar and method for degrading organic pollutants in water body by graphitized biochar | |
| CN110227499B (en) | Method for degrading organic dye in water by using molybdenum disulfide and ferrous iron activated persulfate | |
| CN102247748B (en) | Treatment method and treatment system of tail gas from glyoxylic acid production by nitric acid oxidation of glyoxal | |
| CN103130361A (en) | Ammonia-removing method and device for high-concentration ammonia-containing wastewater | |
| CN103496777B (en) | Pretreatment method of ammonia-nitrogen wastewater | |
| CN112340830B (en) | Application of catalyst taking waste adsorbent after adsorption-desorption as raw material in treating high-salt organic wastewater by activating persulfate | |
| CN111348793B (en) | Treatment method of hydrazine hydrate liquid-phase reduction silver powder waste liquid | |
| CN113912182B (en) | Application of plant-based solid-liquid mixed carbon source | |
| CN114875423A (en) | Device and method for preparing ammonium bicarbonate by using carbon dioxide waste gas and nitrate waste water | |
| CN104787933B (en) | Treatment method for gold-smelting cyanide-containing wastewater | |
| CN107930375B (en) | Treatment method of desulfurization waste liquid generated by wet oxidation desulfurization of coke oven gas | |
| CN203820581U (en) | High-concentration coking desulfurization waste liquid treatment device | |
| CN101428887B (en) | Treatment for nickel-ammonia wastewater with aeration-hydrolyzing process | |
| CN108558084B (en) | Treatment method and device for electrolytic catalysis coupling advanced oxidation of organic matters in high-salt wastewater | |
| CN105110515A (en) | Treatment method of DSD (4, 4'-Diaminostilbene-2, 2'-disulfonic) acid wastewater | |
| CN113698010B (en) | Novel method for detoxifying cyanide cooperatively mediated by superoxide radical and hydroxyl radical | |
| CN106745951A (en) | A kind of production wastewater treatment method of ADC foaming agents | |
| CN110182884B (en) | Method for treating electroplating wastewater by catalytic decomplexation-adsorption of electroplating sludge and decomplexation-adsorption dual-functional material | |
| CN104276685A (en) | Process for recovering ammonia from wastewater containing ammonia nitrogen | |
| CN104150568B (en) | A kind of catalysis and micro-electrolysis material and preparation method thereof | |
| CN102838246B (en) | Method for treating ammonia-nitrogen wastewater by thermal decomposition and application of method | |
| CN114604885B (en) | Preparation method for preparing calcium chloride by using waste hydrochloric acid | |
| CN207608345U (en) | High cyanide containing wastewater integration reclaimer | |
| CN105819564A (en) | Treatment method for paraformaldehyde wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |