CN111773607A - Heavy metal chelating agent and solid product thereof - Google Patents
Heavy metal chelating agent and solid product thereof Download PDFInfo
- Publication number
- CN111773607A CN111773607A CN202010779738.8A CN202010779738A CN111773607A CN 111773607 A CN111773607 A CN 111773607A CN 202010779738 A CN202010779738 A CN 202010779738A CN 111773607 A CN111773607 A CN 111773607A
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- Prior art keywords
- heavy metal
- chelating agent
- solid product
- metal chelating
- percentage
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/33—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by chemical fixing the harmful substance, e.g. by chelation or complexation
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/08—Toxic combustion residues, e.g. toxic substances contained in fly ash from waste incineration
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/43—Inorganic substances containing heavy metals, in the bonded or free state
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a heavy metal chelating agent and a solid product thereof, wherein the heavy metal chelating agent at least comprises the following raw materials in percentage by mass: potassium piperazine dithiocarbamate (20-50%), disodium ethylene diamine tetraacetate (1-2%), reducing agent (11.5-24.5%) and pure water (the rest); the solid product is a solid matter from which pure water is removed; when the piperazine potassium dithio-carboxylate, the ethylene diamine tetraacetic acid and the reducing agent are combined for use, the heavy metal chelating agent and the solid product thereof can effectively inhibit the dissolution of heavy metals such as arsenic, selenium, hexavalent chromium, arsenic, selenium and the like, and do not generate harmful gas.
Description
Technical Field
The invention relates to a chelating agent, in particular to a heavy metal chelating agent and a solid product thereof.
Background
After the garbage recovered from cities is incinerated, toxic fly ash containing heavy metals is generated, if the toxic fly ash is not chelated, the national environmental protection requirement cannot be met, and the heavy metals are not allowed to be buried, so that a chelating agent needs to be added into the fly ash to inhibit the heavy metals from dissolving out.
At present, dithiocarboxylates of amine derivatives, such as potassium piperazine dithiocarboxylate, are mainly used and widely used as heavy metal treating agents because they do not generate highly toxic hydrogen sulfide.
However, arsenic, selenium, hexavalent chromium, arsenic, selenium, and the like contained in fly ash exist in the form of anions, and it is difficult to treat with chelating agents such as potassium dithiocarboxylates, which are amine derivatives.
At present, a method for treating heavy metal pollutants in fly ash by using iron sulfide is known, but the method is unstable to arsenic, selenium, hexavalent chromium and the like, has high corrosivity to dosing equipment, and can generate harmful gases such as carbon disulfide, hydrogen sulfide and the like due to decomposition of amine dithio-carboxylate due to strong acidity.
Disclosure of Invention
The present invention is directed to solving the above problems and to providing a heavy metal chelating agent and a solid product thereof.
The invention realizes the purpose through the following technical scheme:
the heavy metal chelating agent at least comprises the following raw materials in percentage by mass:
specifically, the reducing agent at least comprises the following raw materials in percentage by mass:
10% -20% of ferrous chloride;
1% -3% of trisodium citrate;
0.5 to 1.5 percent of ascorbic acid.
Specifically, the reducing agent at least comprises the following raw materials in percentage by mass:
10 to 20 percent of ferrous sulfate heptahydrate;
2% -3% of trisodium citrate;
0.5 to 1.5 percent of ascorbic acid.
As a preference, the preferred proportions of the components are:
as a preference, the preferred proportions of the components are:
as a preference, the preferred proportions of the components are:
a solid product based on the heavy metal chelating agent at least comprises the following raw materials in percentage by mass:
when in use, the solid product is required to be mixed with pure water for use, and the mixing mass ratio is 48: 52.
A solid product based on the heavy metal chelating agent at least comprises the following raw materials in percentage by mass:
when in use, the solid product is required to be mixed with pure water for use, and the mixing mass ratio is 65: 35.
A solid product based on the heavy metal chelating agent at least comprises the following raw materials in percentage by mass:
when in use, the solid product is required to be mixed with pure water for use, and the mixing mass ratio is 57: 43.
The invention has the beneficial effects that:
when the piperazine potassium dithio-carboxylate, the ethylene diamine tetraacetic acid and the reducing agent are combined for use, the heavy metal chelating agent and the solid product thereof can effectively inhibit the dissolution of heavy metals such as arsenic, selenium, hexavalent chromium, arsenic, selenium and the like, and do not generate harmful gas.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiment is only one embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The heavy metal chelating agent at least comprises the following raw materials in percentage by mass: 20 to 50 percent of piperazine dithio-carboxylic acid potassium, 1 to 2 percent of ethylene diamine tetraacetic acid disodium, 11.5 to 24.5 percent of reducing agent and the balance of pure water.
The formula is an initial formula, and meanwhile, the reducing agent can adopt two different formulas which are respectively (ferrous chloride + trisodium citrate + ascorbic acid) and (ferrous sulfate heptahydrate + trisodium citrate + ascorbic acid), and aiming at the different formulas, the proportion of the reducing agent is limited:
ferrous chloride (10% -20%), trisodium citrate (1% -3%), ascorbic acid (0.5% -1.5%).
Ferrous sulfate heptahydrate (10% -20%), trisodium citrate (2% -3%), ascorbic acid (0.5% -1.5%).
Aiming at the two different reducing agents, three optimal proportioning schemes are obtained through experiments, and the three optimal proportioning schemes are as follows:
(1) potassium piperazine dithiocarbamate (30%), disodium ethylenediamine tetraacetate (1.5%), ferrous chloride (15%), trisodium citrate (1%), ascorbic acid (0.5%), and pure water (balance).
(2) Potassium piperazine dithiocarbamate (40%), disodium ethylenediamine tetraacetate (2%), ferrous chloride (20%), trisodium citrate (2%), ascorbic acid (1%), and pure water (balance).
(3) Potassium piperazine dithiocarbamate (40%), disodium ethylene diamine tetraacetate (2%), ferrous sulfate heptahydrate (12%), trisodium citrate (2%), ascorbic acid (1%), and pure water (balance).
However, in actual work, if the blending of the components of the chelating agent with pure water is completed in advance, there are many inconveniences, such as: the transportation cost is increased, the loading difficulty is increased, the requirements of transportation vehicle conditions and road conditions are increased, and the like, so the chelating agent can be prepared into a solid product firstly, the solid product is transported to an area needing to be used, and the liquid chelating agent is obtained by blending the solid product with pure water according to a certain proportion.
A solid product based on a liquid heavy metal chelating agent obtains 3 solid products according to the optimal proportioning scheme, and the weight ratio is as follows:
(1) the solid product is mixed with pure water for use when in use, and the mixing mass ratio is 48: 52.
(2) The solid product is prepared from potassium piperazine dithiocarbamate (40/65), disodium ethylene diamine tetraacetate (2/65), ferrous chloride (20/65), trisodium citrate (2/65) and ascorbic acid (1/65), and is mixed with pure water for use at a mixing mass ratio of 65: 35.
(3) The solid product is prepared from potassium piperazine dithiocarbamate (40/57), disodium ethylene diamine tetraacetate (2/57), ferrous sulfate heptahydrate (12/57), trisodium citrate (2/57) and ascorbic acid (1/57), wherein the solid product is required to be mixed with pure water for use at a mixing mass ratio of 57: 43.
In the description above, references to "one embodiment," "an embodiment," "one example," "an example," etc., indicate that the embodiment or example so described may include a particular feature, structure, characteristic, property, element, or limitation, but every embodiment or example does not necessarily include the particular feature, structure, characteristic, property, element, or limitation. Moreover, repeated use of the phrase "in accordance with an embodiment of the present application" although it may possibly refer to the same embodiment, does not necessarily refer to the same embodiment.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The heavy metal chelating agent is characterized by at least comprising the following raw materials in percentage by mass:
2. the heavy metal chelating agent according to claim 1, wherein the reducing agent comprises at least the following raw materials in percentage by mass:
10% -20% of ferrous chloride;
1% -3% of trisodium citrate;
0.5 to 1.5 percent of ascorbic acid.
3. The heavy metal chelating agent according to claim 1, wherein the reducing agent comprises at least the following raw materials in percentage by mass:
10 to 20 percent of ferrous sulfate heptahydrate;
2% -3% of trisodium citrate;
0.5 to 1.5 percent of ascorbic acid.
4. A heavy metal chelating agent as claimed in claim 2, wherein the preferred proportions of the components are as follows:
5. a heavy metal chelating agent as claimed in claim 2, wherein the preferred proportions of the components are as follows:
6. a heavy metal chelating agent as claimed in claim 3, wherein the preferred proportions of the components are as follows:
7. a solid product based on the heavy metal chelating agent of claim 4, which is characterized by comprising at least the following raw materials in percentage by mass:
when in use, the solid product is required to be mixed with pure water for use, and the mixing mass ratio is 48: 52.
8. A solid product based on the heavy metal chelating agent of claim 5, which is characterized by comprising at least the following raw materials in percentage by mass:
when in use, the solid product is required to be mixed with pure water for use, and the mixing mass ratio is 65: 35.
9. A solid product based on the heavy metal chelating agent of claim 6, which is characterized by comprising at least the following raw materials in percentage by mass:
when in use, the solid product is required to be mixed with pure water for use, and the mixing mass ratio is 57: 43.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010779738.8A CN111773607A (en) | 2020-08-05 | 2020-08-05 | Heavy metal chelating agent and solid product thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010779738.8A CN111773607A (en) | 2020-08-05 | 2020-08-05 | Heavy metal chelating agent and solid product thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111773607A true CN111773607A (en) | 2020-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010779738.8A Pending CN111773607A (en) | 2020-08-05 | 2020-08-05 | Heavy metal chelating agent and solid product thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114751529A (en) * | 2022-01-13 | 2022-07-15 | 宜城成雄织造有限公司 | Environment-friendly phosphorus-free chelating agent and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005337914A (en) * | 2004-05-27 | 2005-12-08 | Tosoh Corp | Necessary quantity determination method for heavy metal treating agent |
| JP2006316183A (en) * | 2005-05-13 | 2006-11-24 | Tosoh Corp | Heavy metal treating agent and treating method of heavy metal using the same |
| JP2008184469A (en) * | 2006-04-20 | 2008-08-14 | Tosoh Corp | Mixture composition and method for treating heavy metal therewith |
| CN101857296A (en) * | 2010-06-29 | 2010-10-13 | 湖南科技大学 | Ethylenediamine-based heavy metal chelating agent and preparation method thereof |
| CN101947381A (en) * | 2009-07-08 | 2011-01-19 | 东曹株式会社 | The processing method of heavy metal treatment agent and heavy metal pollution material |
| CN102216410A (en) * | 2008-11-18 | 2011-10-12 | 东曹株式会社 | Solid heavy metal processing agent, method for producing same and use of same |
-
2020
- 2020-08-05 CN CN202010779738.8A patent/CN111773607A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005337914A (en) * | 2004-05-27 | 2005-12-08 | Tosoh Corp | Necessary quantity determination method for heavy metal treating agent |
| JP2006316183A (en) * | 2005-05-13 | 2006-11-24 | Tosoh Corp | Heavy metal treating agent and treating method of heavy metal using the same |
| JP2008184469A (en) * | 2006-04-20 | 2008-08-14 | Tosoh Corp | Mixture composition and method for treating heavy metal therewith |
| CN102216410A (en) * | 2008-11-18 | 2011-10-12 | 东曹株式会社 | Solid heavy metal processing agent, method for producing same and use of same |
| CN101947381A (en) * | 2009-07-08 | 2011-01-19 | 东曹株式会社 | The processing method of heavy metal treatment agent and heavy metal pollution material |
| CN101857296A (en) * | 2010-06-29 | 2010-10-13 | 湖南科技大学 | Ethylenediamine-based heavy metal chelating agent and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114751529A (en) * | 2022-01-13 | 2022-07-15 | 宜城成雄织造有限公司 | Environment-friendly phosphorus-free chelating agent and preparation method thereof |
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Application publication date: 20201016 |
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