CN109091792A - A kind of preparation method of flying dust chelating agent and heavy metal chelating agent - Google Patents
A kind of preparation method of flying dust chelating agent and heavy metal chelating agent Download PDFInfo
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- CN109091792A CN109091792A CN201811177404.2A CN201811177404A CN109091792A CN 109091792 A CN109091792 A CN 109091792A CN 201811177404 A CN201811177404 A CN 201811177404A CN 109091792 A CN109091792 A CN 109091792A
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- Prior art keywords
- chelating agent
- flying dust
- acid
- preparation
- heavy metal
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Classifications
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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
-
- 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
Abstract
The invention discloses the preparation methods of a kind of flying dust chelating agent and heavy metal chelating agent, the flying dust chelating agent is mixed with by compounding organic sequestering agent and aqueous slkali, the formula of the compounding organic sequestering agent are as follows: organic phospho acid, hydroxycarboxylic acid, dithionate, aqueous slkali, the preparation method of flying dust chelating agent is to be uniformly mixed organic phospho acid, hydroxycarboxylic acid, dithionate according to formula ratio, it is prepared into the compounding organic sequestering agent, the compounding organic sequestering agent is dissolved in the aqueous slkali of formula ratio, the flying dust chelating agent is uniformly mixing to obtain.Beneficial effect is: can react rapidly with heavy metal ion nearly all in waste water at normal temperature, generate the integration sediment being not soluted in water and with good chemical stability, removing heavy metals are removed to achieve the purpose that capture, production easily dehydration, more closely knit sludge, reduce sludge quantity, usage amount is few, removal rate is high, it is the features such as no pollution to the environment, applied widely, it can be used in the range of pH value 3-9.
Description
Technical field
The present invention relates to metal-chelator fields, more particularly to the preparation of a kind of flying dust chelating agent and heavy metal chelating agent
Method.
Background technique
With the continuous improvement of Chinese Urbanization and living standards of the people, municipal refuse yield is growing day by day, basic
Processing mode mainly has landfill, burning and compost, and incineration treatment technology treating capacity is big, volume reduction is good, innoxious thorough, and has heat
Can recycling effect, therefore, carrying out burning disposal to house refuse is that mode is effectively treated in innoxious, minimizing and recycling,
However, the disposition for burning the flying dust generated is also a big problem, due to two evils in incineration of refuse flyash containing higher concentration
English and heavy metal are dangerous solid waste, and by it, directly landfill can cause serious secondary pollution to surrounding enviroment, therefore,
Solidification and stabilization processing is had to pass through before entering final disposal.
Have both at home and abroad to the common method of flying ash solidification and stabilization at present following several: cement solidification method, melting are solid
Change technology, chemical stabilization processing technique, cement solidification are the intensity and immersion of solidified body when being solidified using cement or lime
Persistence is poor, and melting and solidification consumes a large amount of energy using high-temperature fusion process requirement, and the processing cost is high, chemical stabilization
Have many advantages, such as that simple process, stablizing effect are good, low-cost compared with other stabilization methods, to heavy metal chelant processing
Incineration of refuse flyash is tested, with Na2S is compared with treatment effects such as lime, and when reaching same stable effect, chelating agent makes
For dosage than inorganic stabilizers chemical drug much less, heavy metal chelant is usually liquid product, be easy to water mixed diluting, can be normal
It is added in rule treatment process, but heavy metal chelant currently on the market is many kinds of, wherein inorganic phosphate can be to environment
Especially waters pollutes, and aminocarboxylic acids biological degradability after chelated mineral is very poor, also can to environmental concerns, and
And some heavy metal chelants can only react solidification with part heavy metal ion, and removal rate is not high, narrow scope of application.
Summary of the invention
The object of the invention is that providing a kind of flying dust chelating agent and heavy metal chelating agent to solve the above-mentioned problems
Preparation method.
The present invention through the following technical solutions to achieve the above objectives:
A kind of preparation method of flying dust chelating agent and heavy metal chelating agent, the flying dust chelating agent be by compounding organic sequestering agent and
Aqueous slkali is mixed with, wherein formula components and its mass percent used by compounding organic sequestering agent are as follows: organic phospho acid: 5-
10%, hydroxycarboxylic acid: 3-11%, dithionate: 6-14%, aqueous slkali: 65-86%, the preparation method of the flying dust chelating agent
The following steps are included:
(1) organic phospho acid, hydroxycarboxylic acid, dithionate are uniformly mixed according to formula ratio, it is organic is prepared into the compounding
Chelating agent；
(2) the compounding organic sequestering agent is dissolved in the aqueous slkali of formula ratio, is stirred evenly, stood a period of time, obtain
The flying dust chelating agent.
The organic phospho acid is aminotrimethylenephosphonic acid, 1-hydroxy ethylidene-1,1-diphosphonic acid, ethylene diamine tetra methylene phosphonic acid, divinyl
Five methylenephosphonic acid of triamine, aminotrimethylenephosphonic acid it is one or more.
The hydroxycarboxylic acid be gluconic acid, polyacrylic acid, maleic acid it is one or more.
The dithionate is silver diethyl dithio carbamate, sodium diethyldithiocarbamate, ethyl
Potassium xanthate it is one or more.
The sodium hydroxide solution that the aqueous slkali is calcium hydroxide saturated solution or concentration is 2-6mol/L.
Stirring rate is 100-500r/min in step (2), when standing a length of 6-12h.
The pH value (1% water solubility) of the flying dust chelating agent is 9-12.
Beneficial effect is: can at normal temperature with heavy metal ion nearly all in waste water (mercury, lead, copper, chromium, nickel, manganese,
Zinc chrome etc.) reaction rapidly, the integration sediment being not soluted in water and with good chemical stability is generated, to reach capture
The purpose of removing heavy metals is gone, easily dehydration, more closely knit sludge is produced, reduces sludge quantity, usage amount is few, and removal rate is high, to environment
The features such as pollution-free, removal rate >=99.5% is applied widely, can use in the range of pH value 3-9.
Specific embodiment
Principles and features of the present invention are described below in conjunction with specific example, example is served only for explaining this hair
It is bright, it is not intended to limit the scope of the present invention, unless otherwise specified, conventional prior completion is all made of in following embodiments.
Embodiment one
A kind of preparation method of flying dust chelating agent and heavy metal chelating agent, the flying dust chelating agent be by compounding organic sequestering agent and
Aqueous slkali is mixed with, wherein formula components and its mass percent used by compounding organic sequestering agent are as follows: organic phospho acid:
5%, hydroxycarboxylic acid: 6%, dithionate: 8%, aqueous slkali: 81%, the preparation method of the flying dust chelating agent includes following step
It is rapid:
(1) organic phospho acid, hydroxycarboxylic acid, dithionate are uniformly mixed according to formula ratio, it is organic is prepared into the compounding
Chelating agent, wherein the organic phospho acid include aminotrimethylenephosphonic acid, 1-hydroxy ethylidene-1,1-diphosphonic acid, ethylene diamine tetra methylene phosphonic acid,
Diethylene triamine pentamethylene phosphonic, aminotrimethylenephosphonic acid, mass ratio 1.5:2:1:3:2.5, the hydroxycarboxylic acid are Portugal
Grape saccharic acid, the dithionate include silver diethyl dithio carbamate, sodium diethyldithiocarbamate, ethyl
Potassium xanthate, mass ratio 0.8:3:1；
(2) concentration that the compounding organic sequestering agent is dissolved in formula ratio is in the sodium hydroxide solution of 6mol/L, with 500r/
The stirring rate of min stirs evenly, and stands 6h, obtains the flying dust chelating agent.
The organic phospho acid is aminotrimethylenephosphonic acid, 1-hydroxy ethylidene-1,1-diphosphonic acid, ethylene diamine tetra methylene phosphonic acid, divinyl
Five methylenephosphonic acid of triamine, aminotrimethylenephosphonic acid it is one or more.
The pH value (1% water solubility) of the flying dust chelating agent is 11.2.
Embodiment two
A kind of preparation method of flying dust chelating agent and heavy metal chelating agent, the flying dust chelating agent be by compounding organic sequestering agent and
Aqueous slkali is mixed with, wherein formula components and its mass percent used by compounding organic sequestering agent are as follows: organic phospho acid 6%,
Hydroxycarboxylic acid 8%, dithionate 10%, aqueous slkali 76%, the preparation method of the flying dust chelating agent the following steps are included:
(1) organic phospho acid, hydroxycarboxylic acid, dithionate are uniformly mixed according to formula ratio, it is organic is prepared into the compounding
Chelating agent, wherein the organic phospho acid includes aminotrimethylenephosphonic acid, 1-hydroxy ethylidene-1,1-diphosphonic acid, ethylene diamine tetra methylene phosphonic acid,
Its mass ratio is 1:2:3, and the hydroxycarboxylic acid includes gluconic acid, polyacrylic acid, and mass ratio 1:1.5, described two is thio
Carboxylate includes silver diethyl dithio carbamate, sodium diethyldithiocarbamate, ehtyl potassium xanthate, mass ratio
For 3:1.5:2；
(2) concentration that the compounding organic sequestering agent is dissolved in formula ratio is in the sodium hydroxide solution of 2mol/L, with 150r/
The stirring rate of min stirs evenly, and stands 6h, obtains the flying dust chelating agent.
The pH value (1% water solubility) of the flying dust chelating agent is 9.8.
Embodiment three
A kind of preparation method of flying dust chelating agent and heavy metal chelating agent, the flying dust chelating agent be by compounding organic sequestering agent and
Aqueous slkali is mixed with, wherein formula components and its mass percent used by compounding organic sequestering agent are as follows: organic phospho acid 9%,
Hydroxycarboxylic acid 11%, dithionate 6%, aqueous slkali 74%, the preparation method of the flying dust chelating agent the following steps are included:
(1) organic phospho acid, hydroxycarboxylic acid, dithionate are uniformly mixed according to formula ratio, it is organic is prepared into the compounding
Chelating agent, wherein the organic phospho acid includes aminotrimethylenephosphonic acid, 1-hydroxy ethylidene-1,1-diphosphonic acid, mass ratio 4:1, institute
Stating hydroxycarboxylic acid includes gluconic acid, polyacrylic acid, maleic acid, mass ratio 1:0.7:2, and the dithionate includes
Silver diethyl dithio carbamate, sodium diethyldithiocarbamate, ehtyl potassium xanthate, mass ratio 1:2.5:
0.8；
(2) concentration that the compounding organic sequestering agent is dissolved in formula ratio is in the sodium hydroxide solution of 3mol/L, with 200r/
The stirring rate of min stirs evenly, and stands 8h, obtains the flying dust chelating agent.
The pH value (1% water solubility) of the flying dust chelating agent is 10.1.
Example IV
A kind of preparation method of flying dust chelating agent and heavy metal chelating agent, the flying dust chelating agent be by compounding organic sequestering agent and
Aqueous slkali is mixed with, wherein formula components and its mass percent used by compounding organic sequestering agent are as follows: organic phospho acid 7%,
Hydroxycarboxylic acid 10%, dithionate 13%, aqueous slkali 70%, the preparation method of the flying dust chelating agent the following steps are included:
(1) organic phospho acid, hydroxycarboxylic acid, dithionate are uniformly mixed according to formula ratio, it is organic is prepared into the compounding
Chelating agent, wherein the organic phospho acid includes 1-hydroxy ethylidene-1,1-diphosphonic acid, ethylene diamine tetra methylene phosphonic acid, five methene of diethylenetriamine
Phosphonic acids, aminotrimethylenephosphonic acid, mass ratio 2:1:1:0.5, the hydroxycarboxylic acid include gluconic acid, polyacrylic acid, horse
Carry out sour, mass ratio 0.5:1.5:1, the dithionate includes silver diethyl dithio carbamate, ethyl xanthan
Sour potassium, mass ratio 3:1；
(2) concentration that the compounding organic sequestering agent is dissolved in formula ratio is in the sodium hydroxide solution of 4mol/L, with 300r/
The stirring rate of min stirs evenly, and stands 10h, obtains the flying dust chelating agent.
The pH value (1% water solubility) of the flying dust chelating agent is 10.6.
Embodiment five
A kind of preparation method of flying dust chelating agent and heavy metal chelating agent, the flying dust chelating agent be by compounding organic sequestering agent and
Aqueous slkali is mixed with, wherein formula components and its mass percent used by compounding organic sequestering agent are as follows: organic phospho acid
10%, hydroxycarboxylic acid 4%, dithionate 12%, aqueous slkali 74%, the preparation method of the flying dust chelating agent include following step
It is rapid:
(1) organic phospho acid, hydroxycarboxylic acid, dithionate are uniformly mixed according to formula ratio, it is organic is prepared into the compounding
Chelating agent, wherein the organic phospho acid includes aminotrimethylenephosphonic acid, 1-hydroxy ethylidene-1,1-diphosphonic acid, mass ratio 4:1, institute
Stating hydroxycarboxylic acid includes gluconic acid, polyacrylic acid, maleic acid, mass ratio 1:0.7:2, and the dithionate includes
Silver diethyl dithio carbamate, sodium diethyldithiocarbamate, ehtyl potassium xanthate, mass ratio 1:2.5:
0.8；
(2) the compounding organic sequestering agent is dissolved in the calcium hydroxide saturated solution of formula ratio, with the stirring of 400r/min
Rate stirs evenly, and stands 12h, obtains the flying dust chelating agent.
The pH value (1% water solubility) of the flying dust chelating agent is 9.5.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.
Claims (7)
1. a kind of preparation method of flying dust chelating agent and heavy metal chelating agent, which is characterized in that the flying dust chelating agent is by multiple
It is mixed with organic sequestering agent and aqueous slkali, wherein formula components and its mass percent used by compounding organic sequestering agent
Are as follows: organic phospho acid: 5-10%, hydroxycarboxylic acid: 3-11%, dithionate: 6-14%, aqueous slkali: 65-86%, the flying dust chela
The preparation method of mixture the following steps are included:
(1) organic phospho acid, hydroxycarboxylic acid, dithionate are uniformly mixed according to formula ratio, it is organic is prepared into the compounding
Chelating agent；
(2) the compounding organic sequestering agent is dissolved in the aqueous slkali of formula ratio, is stirred evenly, stood a period of time, obtain
The flying dust chelating agent.
2. the preparation method of a kind of flying dust chelating agent and heavy metal chelating agent according to claim 1, which is characterized in that institute
Stating organic phospho acid is aminotrimethylenephosphonic acid, 1-hydroxy ethylidene-1,1-diphosphonic acid, ethylene diamine tetra methylene phosphonic acid, five methene of diethylenetriamine
Phosphonic acids, aminotrimethylenephosphonic acid it is one or more.
3. the preparation method of a kind of flying dust chelating agent and heavy metal chelating agent according to claim 1, which is characterized in that institute
State hydroxycarboxylic acid be gluconic acid, polyacrylic acid, maleic acid it is one or more.
4. the preparation method of a kind of flying dust chelating agent and heavy metal chelating agent according to claim 1, which is characterized in that institute
Stating dithionate is silver diethyl dithio carbamate, sodium diethyldithiocarbamate, ehtyl potassium xanthate
It is one or more.
5. the preparation method of a kind of flying dust chelating agent and heavy metal chelating agent according to claim 1, which is characterized in that institute
State the sodium hydroxide solution that aqueous slkali is calcium hydroxide saturated solution or concentration is 2-6mol/L.
6. the preparation method of a kind of flying dust chelating agent and heavy metal chelating agent according to claim 1, which is characterized in that step
Suddenly stirring rate is 100-500r/min in (2), when standing a length of 6-12h.
7. the preparation method of a kind of flying dust chelating agent and heavy metal chelating agent according to claim 1, which is characterized in that institute
The pH value (1% water solubility) for stating flying dust chelating agent is 9-12.
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| CN201811177404.2A CN109091792A (en) | 2018-10-10 | 2018-10-10 | A kind of preparation method of flying dust chelating agent and heavy metal chelating agent |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110559594A (en) * | 2019-08-27 | 2019-12-13 | 昆明理工大学 | multi-effect gaseous stabilizer and application thereof in heavy metal stabilization treatment |
| CN113563036A (en) * | 2021-08-27 | 2021-10-29 | 叶县鸿立实业有限公司 | Fly ash autoclaved brick containing fly ash of garbage power plant and preparation method thereof |
| CN113620351A (en) * | 2021-07-02 | 2021-11-09 | 湖北百杰瑞新材料股份有限公司 | Method for preparing nickel-cobalt-manganese ternary material precursor |
| CN113713313A (en) * | 2021-09-02 | 2021-11-30 | 中科南京绿色制造产业创新研究院 | Method for treating heavy metal in fly ash |
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| CN108607195A (en) * | 2018-06-08 | 2018-10-02 | 江苏华本环境科技有限公司 | A kind of stabilizing fly ash processing unit |
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| CN1600462A (en) * | 2004-10-12 | 2005-03-30 | 上海大学 | Treatment method for stabilizing flying ash in burning garbage |
| CN103586272A (en) * | 2013-12-02 | 2014-02-19 | 辽宁石油化工大学 | Application of polyamino polyether methylene phosphonate in clearance of cadmium contamination in soil |
| CN103639190A (en) * | 2013-12-17 | 2014-03-19 | 辽宁石油化工大学 | Method for restoring lead polluted soil with amino trimethylene phosphonic acid (ATMP) |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110559594A (en) * | 2019-08-27 | 2019-12-13 | 昆明理工大学 | multi-effect gaseous stabilizer and application thereof in heavy metal stabilization treatment |
| CN113620351A (en) * | 2021-07-02 | 2021-11-09 | 湖北百杰瑞新材料股份有限公司 | Method for preparing nickel-cobalt-manganese ternary material precursor |
| CN113563036A (en) * | 2021-08-27 | 2021-10-29 | 叶县鸿立实业有限公司 | Fly ash autoclaved brick containing fly ash of garbage power plant and preparation method thereof |
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| CN113713313B (en) * | 2021-09-02 | 2022-06-21 | 中科南京绿色制造产业创新研究院 | Method for treating heavy metal in fly ash |
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Application publication date: 20181228 |