CN102092873A - Method for preparing Cr6+ collecting agent with high selectivity - Google Patents
Method for preparing Cr6+ collecting agent with high selectivity Download PDFInfo
- Publication number
- CN102092873A CN102092873A CN2009102194424A CN200910219442A CN102092873A CN 102092873 A CN102092873 A CN 102092873A CN 2009102194424 A CN2009102194424 A CN 2009102194424A CN 200910219442 A CN200910219442 A CN 200910219442A CN 102092873 A CN102092873 A CN 102092873A
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- Prior art keywords
- polyacrylamide
- add
- trapping agent
- preparation
- collecting agent
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Abstract
The invention belongs to the field of environmental engineering, and discloses a method for preparing a Cr6+ collecting agent with high selectivity. The collecting agent is prepared by a series of means of coordination, cross linking and the like according to the structure and the property of polyacrylamide. The collecting agent has stable chemical performance, can selectively collect wastewater and sludge containing heavy metal Cr6+, garbage burnt fly ash and the like, and does not produce secondary pollution.
Description
Technical field
The invention belongs to field of environment protection, relate to a kind of highly selective Cr
6+The preparation method of trapping agent.
Background technology
Cr
6+Be mainly derived from the industry such as exploitation, smelting, electrolysis, plating of chemical industry, ore.For the property swallowed poisonous substance/imbedibility utmost point poisonous substance, environment there is lasting danger.At present for Cr
6+The improvement method mainly contains absorption method, coagulation, chemical reduction method etc.But these methods exist cost height, effect not ideal enough.Belong to the reductibility medicament more and add strong basicity oxyhydroxide, itself will pollute its production process environment, and the sediment instability that contains heavy metal that is produced when administering, and decomposes easily and causes secondary pollution.In recent years, more and more general at the high-molecular chelating agent research and the application of heavy metal ion, but sequestrant commonly used in the market is to Cr
6+Treatment effect bad and dosage is big, cost is high, exist and handle back effluent color dilution and S
2-Problems such as concentration over-standard.
The purpose of this invention is to provide a kind of be used for handling contain Cr
6+The preparation method of the high-selectivity heavy metal ion-trapping agent of waste water, this trapping agent also can be used for mud, the processing of incineration of refuse flyash etc.The present invention adopts polyacrylamide and hydrazine sulfate as main raw material, prepared Cr
6+The trapping agent product is not only effective, be easy to immobilization handles and reclaims chromium, and stable chemical performance, can not cause secondary pollution.Compare with domestic and international common chemical synthetic sequestrant, this trapping agent price is low, is easy to go into operation, and production application process is easy.
Summary of the invention
A kind of highly selective Cr
6+The preparation method of trapping agent is characterized in that this method may further comprise the steps:
1, coordination reaction: under the room temperature, dropping sodium solution in polyacrylamide is warming up to 35 ℃ and stirs after 1-3 hour, and reaction solution is standby.
2, crosslinking reaction: in 50 ℃ of water-baths, in reaction solution, add hydrazine sulfate, stir 5h, obtain mixed solution and be liquid Cr
6+Trapping agent.
Among the present invention, the mass ratio of sodium hydroxide and polyacrylamide is 1-3: 1, and volume ratio 1: 2-4, the molecular weight 300-500 ten thousand of polyacrylamide.Hydrazine sulfate add-on 1.5g.
Embodiment
Embodiment 1: under the room temperature, get 100ml, the 1g/L polyacrylamide is put into there-necked flask, add the sodium hydroxide of 50ml, 0.5mol/L, add 50ml water, 35 ℃ were stirred 2 hours; Add polyamines carbohydrate 5g again, be warming up to 40 ℃ of reactions 1.5 hours, be warming up to 50 ℃, react after 1 hour, add hydrazine sulfate 1.5g, under 50 ℃ of conditions, reacted 3 hours, stop heating, be cooled to room temperature.
Embodiment 2: take by weighing polyacrylamide 2g, put into the there-necked flask that has reflux exchanger, thermometer, under the room temperature, add water 200ml, sodium hydroxide 2.0g, stirred 1 hour, and be warming up to 40 ℃, reacted 3 hours, after being warming up to 50 ℃, add hydrazine sulfate 1.5g again, after continuing to stir 3h, stop heating.Cooled and filtered, drying obtains product.
Embodiment 3: get molecular weight 5,000,000 polyacrylamide 0.5g, add water 200ml, stirred 2 hours under 30 ℃ of conditions, hydro-oxidation sodium 2.0g stirred after 2 hours, was warming up to 50 ℃, added hydrazine sulfate 2.5g, reacted 5 hours, stopped heating, and cooling obtains product.
Claims (4)
1. highly selective Cr
6+The trapping agent preparation method is characterized in that:
(1) coordination reaction: under the room temperature, add polyacrylamide in reactor, dropping sodium adds water, stirs.
(2) crosslinking reaction: in the coordination reaction product, add hydrazine sulfate, continue to stir.
2. selectivity Cr according to claim 1
6+The preparation method of trapping agent is characterized in that: the polyacrylamide of preparation partial hydrolysis that trapping agent adopts can adopt the commodity polyacrylamide of molecular weight 〉=3,000,000 or monomer to synthesize.
3. selectivity Cr according to claim 1
6+The preparation method of trapping agent, will add when it is characterized in that crosslinking reaction can provide-NH
2-,-C=O-,-C=O-NH-,-C=S-,-OH, the material of-N-S-functional group.
4. method according to claim 1 is characterized in that among the present invention, and the mass ratio of sodium hydroxide and polyacrylamide is 1-3: 1, and volume ratio 1: 2-4, hydrazine sulfate add-on 1-3g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102194424A CN102092873B (en) | 2009-12-11 | 2009-12-11 | Method for preparing Cr6+ collecting agent with high selectivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102194424A CN102092873B (en) | 2009-12-11 | 2009-12-11 | Method for preparing Cr6+ collecting agent with high selectivity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102092873A true CN102092873A (en) | 2011-06-15 |
| CN102092873B CN102092873B (en) | 2013-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102194424A Active CN102092873B (en) | 2009-12-11 | 2009-12-11 | Method for preparing Cr6+ collecting agent with high selectivity |
Country Status (1)
| Country | Link |
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| CN (1) | CN102092873B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005049197A1 (en) * | 2003-11-19 | 2005-06-02 | Chelos Ab | Adsorption material and process for its production |
| CN101186370A (en) * | 2007-12-11 | 2008-05-28 | 南京师范大学 | Method for purifying chromium-containing industrial waste water by using composite flocculant |
| CN101314492A (en) * | 2007-05-29 | 2008-12-03 | 陈德琪 | Method for preparing novel remover for heavy metal ion and application thereof |
-
2009
- 2009-12-11 CN CN2009102194424A patent/CN102092873B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005049197A1 (en) * | 2003-11-19 | 2005-06-02 | Chelos Ab | Adsorption material and process for its production |
| CN101314492A (en) * | 2007-05-29 | 2008-12-03 | 陈德琪 | Method for preparing novel remover for heavy metal ion and application thereof |
| CN101186370A (en) * | 2007-12-11 | 2008-05-28 | 南京师范大学 | Method for purifying chromium-containing industrial waste water by using composite flocculant |
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| Publication number | Publication date |
|---|---|
| CN102092873B (en) | 2013-12-04 |
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