CN106831514A - The preparation method and heavy metal chelant of heavy metal chelant - Google Patents
The preparation method and heavy metal chelant of heavy metal chelant Download PDFInfo
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- CN106831514A CN106831514A CN201710109526.7A CN201710109526A CN106831514A CN 106831514 A CN106831514 A CN 106831514A CN 201710109526 A CN201710109526 A CN 201710109526A CN 106831514 A CN106831514 A CN 106831514A
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- heavy metal
- metal chelant
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- carbon disulfide
- added dropwise
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C333/00—Derivatives of thiocarbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C333/14—Dithiocarbamic acids; Derivatives thereof
- C07C333/16—Salts of dithiocarbamic acids
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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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
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- General Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
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- Processing Of Solid Wastes (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The present invention discloses a kind of preparation method of heavy metal chelant.Comprise the following steps：By 4,4', 4 " triaminotriphenyl-methane is raw material, is dissolved in ethanol water, and adjusts solution ph to 10~12 using sodium hydroxide solution；Under condition of ice bath, carbon disulfide is progressively added dropwise；Wherein mole dosage of carbon disulfide is 4,4', 4 " 3 3.5 times of triaminotriphenyl-methane mole, rate of addition is 5 10ml/min；Carbon disulfide reacts 5 10 hours after being added dropwise to complete under stirring, continues to be added dropwise sodium hydroxide solution up to solution is without flocculence, obtains heavy metal chelant.The preparation method of the heavy metal chelant that the present invention is provided, centric quantity is more, leaching concentration is low for the heavy metal chelant unit formula amount chelating for preparing.The present invention also provides a kind of heavy metal chelant prepared by the method.
Description
【Technical field】
The present invention relates to metal-chelator technical field, and in particular to the preparation method and a huge sum of money of a kind of heavy metal chelant
Category chelating agent.
【Background technology】
Domestic garbage incineration flyash complicated component, major pollutant is the heavy metal with Leaching high, to environment
There is serious harm.Heavy metal is constantly migrated in the environment, conversion, contaminated soil and water environment cannot by itself
Catharsis is realized eliminating, and can not be decomposed by the microorganisms, and can be enriched with by biological chain, therefore flying dust is dealt with improperly and caused
Pollutant Heavy metals therein can produce serious harm in environment to health and natural environment.
At present, the most frequently used processing method has two kinds, and one kind is using cement solidification technology heavy metal curing process, a huge sum of money
Category is reacted by ion exchange, passivation, absorption, chemisorbed, sedimentation and the cement of aquation, finally in the hydrated silicate of cement
The relatively stable compound such as hydroxide or complex compound is formed on colloid surface；Two is chemical agent stabilization method, and chemical agent leads to
Cross its ion transit into low-solubility, the high-molecular complex or inorganic mineral of low migration with the chemical reaction of heavy metal
Matter.
The shortcoming of wherein cement solidification technology is big addition, and the increase-volume amount to flying dust is big, increases the volume of landfill；And phase
Chemical agent stabilization method is used in the technology of pass, the chelating agent of use is generally that (dithiocar-bamate is referred to as DTC quasi-chelate compounds
DTC), on-macromolecular compound is belonged to, unit formula amount contains that complexing center is few, and the complex compound generated with heavy metal can leach dense
Degree is high, and separation of heavy metal ions effect is poor.
Therefore, it is necessary to providing a kind of new technique solves above-mentioned technical problem.
【The content of the invention】
The purpose of the present invention is to overcome above-mentioned technical problem, there is provided a kind of preparation method of heavy metal chelant, is prepared into
Centric quantity is more, leaching concentration is low for the heavy metal chelant unit formula amount chelating for arriving.
The technical scheme is that：
A kind of preparation method of heavy metal chelant, comprises the following steps：
Step S1：By 4,4', 4 "-triaminotriphenyl-methane is raw material, is dissolved in ethanol water, and utilize NaOH
Solution adjusts solution ph to 10~12；
Step S2：Under condition of ice bath, carbon disulfide is progressively added dropwise；Wherein mole dosage of carbon disulfide is 4,4', 4 "-
3-3.5 times of triaminotriphenyl-methane mole, rate of addition is 5-10ml/min；
Step S3：Carbon disulfide reacts 5-10 hours after being added dropwise to complete under stirring, continues dropwise addition NaOH molten
Liquid is until solution, without flocculence, obtains heavy metal chelant.
Preferably, in the ethanol water, ethanol is 1 with the volume ratio of water:1.
Preferably, the molar concentration of sodium hydroxide solution is 2mol/L.
Preferably, the temperature of condition of ice bath is 0-5 DEG C.
The present invention also provides a kind of heavy metal chelant, is prepared by the preparation method of the heavy metal chelant.
Compared with correlation technique, the preparation method of the heavy metal chelant that the present invention is provided, beneficial effect is：
First, with 4,4', 4 "-triaminotriphenyl-methane is raw material, and chemical equation is：
The chelating agent monomolecular substance for preparing has multiple complexing centers, and the heavy metal ion capacity that can be chelated is big.
2nd, the chelating agent and the complex compound acid-resisting ability of heavy metal complexing generation are strong, stability is strong, leaching concentration
It is low.
【Specific embodiment】
Below will the invention will be further described by specific embodiment.
Embodiment one
A kind of preparation method of heavy metal chelant, comprises the following steps：
Step S1：By 100g4,4', 4 "-triaminotriphenyl-methane be raw material, be dissolved in 200ml ethanol waters, and profit
Solution ph to 10~12 is adjusted with the sodium hydroxide solution of 2mol/L；
Wherein, ethanol and the volume ratio of water are 1 in ethanol water:1
Step S2：Under stirring, under condition of ice bath, carbon disulfide is progressively added dropwise；The wherein mole dosage of carbon disulfide
It is 4,4', 4 " 3 times of-triaminotriphenyl-methane mole, rate of addition is 5ml/min；
Wherein, the temperature of condition of ice bath is 0-5 DEG C；
Step S3：Carbon disulfide reacts 5-10 hours after being added dropwise to complete under stirring, continues dropwise addition NaOH molten
Liquid is until solution, without flocculence, obtains heavy metal chelant.
Embodiment two
A kind of preparation method of heavy metal chelant, comprises the following steps：
Step S1：By 100g4,4', 4 "-triaminotriphenyl-methane be raw material, be dissolved in 300ml ethanol waters, and profit
Solution ph to 10~12 is adjusted with the sodium hydroxide solution of 2mol/L；
Wherein, ethanol and the volume ratio of water are 1 in ethanol water:1
Step S2：Under stirring, under condition of ice bath, carbon disulfide is progressively added dropwise；The wherein mole dosage of carbon disulfide
It is 4,4', 4 " 3.5 times of-triaminotriphenyl-methane mole, rate of addition is 8ml/min；
Wherein, the temperature of condition of ice bath is 0-5 DEG C；
Step S3：Carbon disulfide reacts 5-10 hours after being added dropwise to complete under stirring, continues dropwise addition NaOH molten
Liquid is until solution, without flocculence, obtains heavy metal chelant.
Embodiment three
A kind of preparation method of heavy metal chelant, comprises the following steps：
Step S1：By 100g4,4', 4 "-triaminotriphenyl-methane be raw material, be dissolved in 500ml ethanol waters, and profit
Solution ph to 10~12 is adjusted with the sodium hydroxide solution of 2mol/L；
Wherein, ethanol and the volume ratio of water are 1 in ethanol water:1
Step S2：Under stirring, under condition of ice bath, carbon disulfide is progressively added dropwise；The wherein mole dosage of carbon disulfide
It is 4,4', 4 " 3.2 times of-triaminotriphenyl-methane mole, rate of addition is 10ml/min；
Wherein, the temperature of condition of ice bath is 0-5 DEG C；
Step S3：Carbon disulfide reacts 5-10 hours after being added dropwise to complete under stirring, continues dropwise addition NaOH molten
Liquid is until solution, without flocculence, obtains heavy metal chelant.
Example IV
A kind of preparation method of heavy metal chelant, comprises the following steps：
Step S1：By 100g4,4', 4 "-triaminotriphenyl-methane be raw material, be dissolved in 400ml ethanol waters, and profit
Solution ph to 10~12 is adjusted with the sodium hydroxide solution of 2mol/L；
Wherein, ethanol and the volume ratio of water are 1 in ethanol water:1
Step S2：Under stirring, under condition of ice bath, carbon disulfide is progressively added dropwise；The wherein mole dosage of carbon disulfide
It is 4,4', 4 " 3.3 times of-triaminotriphenyl-methane mole, rate of addition is 6ml/min；
Wherein, the temperature of condition of ice bath is 0-5 DEG C；
Step S3：Carbon disulfide reacts 5-10 hours after being added dropwise to complete under stirring, continues dropwise addition NaOH molten
Liquid is until solution, without flocculence, obtains heavy metal chelant.
Compared with correlation technique, the preparation method of the heavy metal chelant that the present invention is provided, beneficial effect is：
First, with 4,4', 4 "-triaminotriphenyl-methane is raw material, and the chelating agent monomolecular substance for preparing has multiple
Complexing center, the heavy metal ion capacity that can be chelated is big.
2nd, the chelating agent and the complex compound acid-resisting ability of heavy metal complexing generation are strong, stability is strong, leaching concentration
It is low.
Above-described is only embodiments of the present invention, it should be noted here that for one of ordinary skill in the art
For, without departing from the concept of the premise of the invention, improvement can also be made, but these belong to protection model of the invention
Enclose.
Claims (5)
1. a kind of preparation method of heavy metal chelant, it is characterised in that comprise the following steps：
Step S1：By 4,4', 4 "-triaminotriphenyl-methane is raw material, is dissolved in ethanol water, and utilize sodium hydroxide solution
Adjust solution ph to 10~12；
Step S2：Under condition of ice bath, carbon disulfide is progressively added dropwise；Wherein mole dosage of carbon disulfide is 4,4', 4 "-three ammonia
3-3.5 times of base triphenylmenthane mole, rate of addition is 5-10ml/mi n；
Step S3：Carbon disulfide reacts 5-10 hours after being added dropwise to complete under stirring, continues dropwise addition sodium hydroxide solution straight
To solution without flocculence, heavy metal chelant is obtained.
2. the preparation method of heavy metal chelant according to claim 1, it is characterised in that in the ethanol water,
Ethanol is 1 with the volume ratio of water:1.
3. the preparation method of heavy metal chelant according to claim 1, it is characterised in that sodium hydroxide solution mole
Concentration is 2mo l/L.
4. the preparation method of heavy metal chelant according to claim 1, it is characterised in that in step S2, condition of ice bath
Temperature be 0-5 DEG C.
5. a kind of heavy metal chelant, it is characterised in that the system of the heavy metal chelant as any one of claim 1-4
Preparation Method is prepared.
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| CN201710109526.7A CN106831514A (en) | 2017-02-27 | 2017-02-27 | The preparation method and heavy metal chelant of heavy metal chelant |
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| CN201710109526.7A CN106831514A (en) | 2017-02-27 | 2017-02-27 | The preparation method and heavy metal chelant of heavy metal chelant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110203991A (en) * | 2018-11-23 | 2019-09-06 | 北京师范大学 | A kind of heavy metals removal preparation and its synthetic method and application |
| CN110217872A (en) * | 2019-06-27 | 2019-09-10 | 中冶南方都市环保工程技术股份有限公司 | A kind of heavy metal chelating agent and its preparation method and application |
| CN112430219A (en) * | 2020-11-23 | 2021-03-02 | 武汉工程大学 | Melamine derivative heavy metal chelating agent and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1631940A (en) * | 2004-11-12 | 2005-06-29 | 清华大学 | Macromolecular heavy metal chelating agent for stabilization of dangerous waste materials and method for preparing same |
| CN102432089A (en) * | 2011-11-14 | 2012-05-02 | 浙江至美环境科技有限公司 | Preparation method of broad-spectrum heavy metal trapping agent |
-
2017
- 2017-02-27 CN CN201710109526.7A patent/CN106831514A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631940A (en) * | 2004-11-12 | 2005-06-29 | 清华大学 | Macromolecular heavy metal chelating agent for stabilization of dangerous waste materials and method for preparing same |
| CN102432089A (en) * | 2011-11-14 | 2012-05-02 | 浙江至美环境科技有限公司 | Preparation method of broad-spectrum heavy metal trapping agent |
Non-Patent Citations (3)
| Title |
|---|
| EHSAN AMIN: ""Evaluation of p-phenylene-bis and phenyl dithiocarbamate sodium salts as inhibitors of mushroom tyrosinase", 《ACTA.ABP》 * |
| 李艳红: "氯化二烯丙基甲基羟丙多胺基铵基二硫代甲酸钠的合成及性能研究", 《中国优秀硕士学位论文全文数据库（工程科技I辑）》 * |
| 相波等: "DTC类重金属捕集剂研究的进展", 《电镀与环保》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110203991A (en) * | 2018-11-23 | 2019-09-06 | 北京师范大学 | A kind of heavy metals removal preparation and its synthetic method and application |
| CN110217872A (en) * | 2019-06-27 | 2019-09-10 | 中冶南方都市环保工程技术股份有限公司 | A kind of heavy metal chelating agent and its preparation method and application |
| CN110217872B (en) * | 2019-06-27 | 2021-09-21 | 中冶南方都市环保工程技术股份有限公司 | Heavy metal trapping agent and preparation method and application thereof |
| CN112430219A (en) * | 2020-11-23 | 2021-03-02 | 武汉工程大学 | Melamine derivative heavy metal chelating agent and preparation method thereof |
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